CHANGELOG.md

Change Log

All notable changes to this project will be documented in this file. This file should follow the standards specified on [http://keepachangelog.com/] This project adheres to Semantic Versioning.

[11.5.0.beta.1] 2023-12-29

Added

• migrated to zeitwerk
• rails 7.1 support

Fixed

• caching of has one relationships

[11.4.0] 2023-12-02

Added

• Added support for cypher UNION

[11.3.1] 2023-02-12

Fixed

• Fixed an issue with keyword arguments on jruby-9.3 when none were passed

[11.3.0] 2023-02-10

Added

• support for keyword arguments in scopes

Fixed

• Fixed issue with psych #1684 (Thanks @chytreg)

[11.2.0] 2023-02-06

Added

• support for neo4j:schema:dump and :load for neo4j 4 and 5. No automatic migration of schema on major neo4j upgrades. Schema must be regenerated with neo4j:schema:dump or manually adjusted to new syntax on those upgrades.

[11.1.0] 2023-01-10

Added

• support for pure ruby driver, neo4j-ruby-driver 4.4
• support for neo4j 5

Fixed

• moved migrations into their own transactions
• Uniqueness within a scope defined by a proc
• Fixed lost @rel_var when branching QueryProxy

[11.0.2] 2021-11-05

Fixed

• Fixed issue where some has_one relationships where incorrectly deleted disregarding direction

[11.0.1] 2021-07-14

• It changes the relationship length assignment in query proxy eagerloading module to be consistent with query proxy relationship length syntax.

[11.0.0] 2021-06-25

Added

• support for neo4j 4.1, 4.2, 4.3

[10.1.0] 2021-02-05

Added

• support for ruby 3.0.0

[10.0.2] 2020-12-08

Fixed

• fixed bad require (#1634)
• removed unused exception class (Thanks @joshjordan)
• prevented after_commit callbacks from being called multiple times (Thanks @joshjordan)

[10.0.1] 2020-07-26

Fixed

• fixed incorrect id comparison, which could result in lost relationships (#1611)
• brought back BigDecimalConverter
• fixed rails template (Thanks @ekampp)

[10.0.0] 2020-07-06

• neo4j 4.0 support (default database only)
• dropped support for neo4j 3.3 or earlier
• full bolt support
• full causal cluster support
• removal of http support
• removal of embedded support (neo4j embedded is still supported via bolt)
• support for a neo4j ruby driver with an api of the official drivers
• discontinuation of the neo4j-core gem. Its functionality is replaced partially by neo4j-ruby-driver and partially by activegraph
• higher naming consistency with activerecord and the official neo4j-java-driver
• configuration more consistent with activerecord
• changed transaction API
• support for sessions with bookmarks and read and write transaction
• enforcing has one constraint on relationships
• better handling of has_many (no deletion and recreation)
• executing association callbacks on relationship deletion

[9.6.1] 2019-12-18

Fixed

• Fixed duplicate records with with_associations on QueryProxy. (#1576)

[9.6.0] 2019-09-3

Added

• support for activemodel and activesupport version 6 (thanks @mrhardikjoshi)

Fixed

• fixed cypher generation for remove_property (thanks @lshimokawa)
• cleaned up deprecations, unused files and badges (thanks @olleolleolle)

[9.5.3] 2019-08-16

Fixed

• Enforces has_one uniqness constraint on relationship with config flag. (#1566)
• Restricting activemodel and activesupport version to < 6.0.

[9.5.2] 2019-08-06

Fixed

• Made neo4j_community gem a development dependency rather than a runtime dependency.

[9.5.1] 2019-07-31

Fixed

• Reverse has_one relationships with ActiveRel (thanks @amitsuryavanshi / #1560)

[9.5.0] 2019-06-17

Added

• Variable length relatinships in eager laoding (thanks @amitsuryavanshi / #1545)

Fixed

• fixed wait_for_connection (thanks @ayghor / see #1540)
• Reverse has_one relationships (thanks @amitsuryavanshi / #1548)
• Missing require 'forwardable' (thanks @jschulenklopper / #1535)

[9.4.0] 2018-12-20

Added

• verbose_query_logs configuration option to allow outputting of source location of queries
• Adaptor classes loaded dynamically on demand
• Optionally specify the full adaptor class name instead of session type only (supports driver adaptor)

Fixed

• Wrong conflicting node aliases on same branch usage (see #1526)
• Incorrect order when order and with_associations are used together
• ScopeEvalContext redirects now all method missing calls to QueryProxy or Target

[9.3.0] 2018-07-12

Added

• Scopes will now automatically show up on instances as well as classes / proxies

[9.2.4] 2018-05-20

Fixed

• BigDecimal handling on properties (thanks @klobuczek / see #1507)

[9.2.3] 2018-05-10

Fixed

• Rescue when node labels cause a LoadError in addition to a NameError (thanks @Grafikart / see #1500)

[9.2.2] 2018-04-19

Fixed

• Introduced a fix to account for the fact that ActiveModel now returns a frozen Hash for changed_attributes (thanks @anamba and subvertallchris / see #1496 and #1499)

[9.2.1] 2018-04-01

Fixed

• Fixed .first and .last methods for QueryProxyMethods (thanks @kopylovvlad / see #1494)

[9.2.0] 2018-03-27

Added

• Ability to create association with labels: false by default (thanks @thefliik / see #1485)

[9.1.8] 2018-03-27

Fixed

• Micro-optimizations which help when dealing with a lot of data (thanks @jgaskins / see #1490)

[9.1.8] 2018-03-27

Fixed

• Micro-optimizations which help when dealing with a lot of data (thanks @jgaskins / see #1490)

[9.1.7] 2018-03-27

Fixed

• Created helpful error message to AssociationTree (thanks @thefliik / see #1488)

[9.1.6] 2018-03-27

Fixed

• Adding link to CHANGELOG.md as shown on https://olivierlacan.com/posts/changelogs-on-rubygems-org/

[9.1.5] 2018-03-18

Fixed

• Performance improvement for attributes (thanks @jgaskins / see #1487)

[9.1.4] 2018-02-20

Fixed

• Fixed issue with ActiveRel.find for when the ID isn't there (thanks @lshimokawa / WARNING: Use of ActiveRel.find is NOT recommended, see #1482)

[9.1.3] 2018-02-01

Fixed

• Fixed issue with Rails 5.1 where neo4j_config.session refers to the wrong this (thanks @RicardoTrindade / see #1471 and #1475)

[9.1.2] 2017-12-18

Fixed

• Issue where the order of ORDER BY was from .order method was not being respected for chains with with_association (thanks @klobuczek / see #1454)

[9.1.1] 2017-12-12

Fixed

• Model.find will, when raising an error about not being able to find the object, now call inspect on the ID value to make it clearer what the error is about (thanks @anamba / see #1314)

[9.1.0] 2017-11-24

Added

• Add rel_where_not to allow negative filtering of relationships (thanks @pmaite88 / see #1446)

[9.0.7] 2017-11-24

Fixes

• Fix "Variable other_rel not defined" error when destroying objects with a dependent: :delete_orphans associations (thanks @nearapogee, @TyGuy, and @leehericks / see #1395)

[9.0.6] 2017-11-21

Fixes

• Ensure RecordNotFound consistent in providing the model (thanks @leviwilson / see #1442)

[9.0.5] 2017-10-16

Fixes

• Ensure branch and with_association methods propagate distinct (thanks @klobuczek / see #1438)

[9.0.4] 2017-10-15

Fixes

• Change YAML.safe_load call in neo4j:schema:load rake task to allow Symbols (thanks @evanob / see #1439)

[9.0.3] 2017-10-12

Fixed

• Ensure branch method propagates with_association_tree context (brought forward from 8.3.1. Thanks @klobuczek / see #1437)

[9.0.2] 2017-10-08

• Accidental release

[9.0.1] 2017-09-26

Fixed

• Properties defined on a superclass after the subclass has been defined will now take effect on the subclass (intended to be released in 9.0.0) (thanks @thefliik / see #1428)

[9.0.0] 2017-09-26

Changed

• By default, enum values are now case-insensitive (but there are local and global _case_sensitive options see the docs) (thanks @thefliik / see #1419)

[8.3.4] 2017-10-16

Fixes

• Ensure branch and with_association methods propagate distinct (thanks @klobuczek / see #1438)

[8.3.3] 2017-10-15

Fixes

• Change YAML.safe_load call in neo4j:schema:load rake task to allow Symbols (thanks @evanob / see #1439)

[8.3.2] 2017-10-12

Fixes

• Ensure branch method propagates with_association_tree context (thanks @klobuczek / see #1437)

[8.3.1] 2017-10-08

• Accidental release

[8.3.0] 2017-09-25

Changed

• Allow chainable: true option when calling has_one associations to start chaining (thanks @thefliik / see #1422)

[8.2.5] 2017-09-23

Fixes

• Error when using pluck(:id) on an association which has an array argument for model_class (thanks @thefliik / see #1426)

[8.2.4] 2017-09-20

Fixes

• Fixes ability to run rails destroy model and rails destroy migration (thanks @thefliik / see #1420)

[8.2.3] 2017-09-19

Fixes

• Scopes now work when inherited three or more levels deep (see #1415, #1413, #1412 / thanks @thefliik)

[8.2.2] 2017-09-18

Fixes

• Allow enums to be created without associated indexes (thanks @thefliik / see #1411)

[8.2.1] 2017-09-01

Fixes

• Bringing forward changes from 8.1.x

[8.2.0] 2017-09-01

Added

• Ability to load nested associations with one query using with_associations (big thanks to @klobuczek / see #1398)

[8.1.4] 2017-08-17

Fixed

• Make sure that we handle the state of the SchemaMigration correctly when we get failures in non-transactional migrations (see #1383 / thanks @leviwilson and @ProGM)

[8.1.4] 2017-08-17

Fixed

• Issue where node Cypher variable could change during a branch (see issue #1348 / thanks @klobuczek for the report)

[8.1.3] 2017-06-29

Fixed

• ActiveRel .first / .last aren't dependable for ordering in Neo4j enterprise, so fixed test (be aware that using .first / .last are not recommended in ActiveRel) (see #1396 / thanks @klobuczek)
• Labels for models are now returned alphabetically (see #1396 / thanks @klobuczek)
• JSON serialization is fixed for String and objects in general which respond to to_json (see #1397 / thanks @leviwilson)

[8.1.2] 2017-06-20

Fixed

• Populates relationship with with already retrieved node (see #1393 / thanks @klobuczek)

[8.1.1] 2017-06-15

Added

• Comment to the top of the schema.yml file to help explain it's presence

[8.1.0] 2017-06-07

Fixed

• Issue where neo4j:schema:load rake task would set schema migration properties as version rather than migration_id

[8.1.0.rc.2] 2017-06-06

Removed

• Support for jRuby 1.7.x

[8.1.0.rc.1] 2017-05-05

Added

• Created neo4j:schema:dump and neo4j:schema:load rake tasks to create schema.yml files which can be checked into the repository for quick setup of a fresh database

Changed

• Removed before and after callback options from associations (model callbacks still exist)

[8.0.18] 2017-06-04

Fixed

• Migration name when generating a model shouldn't be the same as the model (see #1387 / thanks @thefliik and @apotonick)

[8.0.17] 2017-05-03

Fixed

• Don't lock out Rails 5.1 in gemspec

[8.0.16] 2017-05-01

Fixed

• Don't lock out Rails 5.1 in gemspec

[8.0.15] 2017-04-24

Fixed

• Error message for getting distinct on count was not clear

[8.0.14] 2017-04-15

Fixed

• Simple change to description in gemspec file to remove "Ruby on Rails" and "Rack" as the gem can be use in any Ruby-based script / application

[8.0.13] 2017-04-07

Fixed

• Removed put(s|c) statements to avoid issues with background jobs (thanks @andyweiss1982 and @sureshblp71)

[8.0.12] 2017-03-28

Fixed

• Sessions in the neo4j gem are automatically set to have wrap_level: :proc to ensure that nodes and relationships are wrapped in models (even if you aren't using Rails)

[8.0.11] 2017-03-23

Fixed

• Fix issue where an association (which hasn't been accessed) is accessed from an ActiveNode callback

[8.0.9] 2017-03-15

Fixed

• Fix more Ruby 2.4 deprecations re: Integer (see #1363 / thanks @jboler)

[8.0.9] 2017-03-09

Fixed

• Support to_ary on association proxies to help support serializers (thanks @gnapse / see #1362)

[8.0.8] 2017-02-27

Fixed

• Performance and response consistency improvements to exists? methods

[8.0.7] 2017-02-24

Fixed

• Fix Ruby 2.4 deprecations re: Integer (see #1360 / thanks @jboler)

[8.0.6] 2017-02-04

Fixed

• Rake tasks broken without Rails (thanks @CoralineAda, @phreakocious, and @Joshfindit, see #1330, #1331, and #1353)

[8.0.5] 2017-01-05

Fixed

• When invalid session type is given, an exception will be raised to aid debugging (see #1335 / thanks @Joshfindit)

[8.0.4] 2017-01-03

Fixed

• Fixed/refactored wait_for_connection

[8.0.3] 2017-01-03

Fixed

• Fixed/refactored wait_for_connection

[8.0.2] 2016-12-22

Fixed

• Camelization of class names for migrations should now match the snake case of the migration file name (see #1329)

[8.0.1] 2016-12-20

Fixed

• Use UTC timezone for timestamps on migration files

[8.0.0] 2016-12-14

NO CHANGES FROM 8.0.0.rc.4

[8.0.0.rc.4] 2016-10-12

Changed

• find_or_create_by on an association does not look for nodes which aren't related to the node in question (thanks for the report @efatsi / see #1240)

Fixed

• Inconsistent drop_constraint and drop_index behavior: they were accepting force option (like add_* methods)
• PendingMigrationError not showing pending migrations versions
• Fixed silenced: true for Neo4j::Migration::Runner option, not working properly
• Removed "strange" inheritance between Neo4j::Migrations::Base and the legacy Neo4j::Migration class
• Avoid creating the SchemaMigration model constraint when it already exists

[8.0.0.rc.3] 2016-10-12

Added

• distinct method for QueryProxy (thanks @ProGM / see #1305)
• Added update_node_property / update_node_properties (aliased as update_column / update_columns)

[8.0.0.rc.2] 2016-10-07

Fixed

• Pending migration check was failing when there are no migrations

[8.0.0.rc.1] 2016-10-04

Changed

• Pending migrations check, now using a Rack Middleware instead of failing on startup (thanks @ProGM / see #1300)

Added

• Add support for undeclared properties on specific models (see #1294 / thanks @klobuczek)
• Add update_node_property and update_node_properties methods, aliased as update_column and update_columns, to persist changes without triggering validations, callbacks, timestamps, etc,...

[8.0.0.alpha.12] 2016-09-29

Fixed

• Allow multiple arguments to scopes (see #1297 / thanks @klobuczek)
• Fixed validations with unpersisted nodes (see #1293 / thanks @klobuczek & @ProGM)
• Fixed various association bugs (see #1293 / thanks @klobuczek & @ProGM)
• Fix as losing the current query chain scope (see #1298 and #1278 / thanks @ProGM & @ernestoe)

[8.0.0.alpha.11] 2016-09-27

Fixed

• Don't fire database when accessing to unpersisted model associations (thanks @klobuczek & @ProGM see #1273)
• size and length methods not taking account of @deferred_objects (see #1293)
• update was not rolling-back association changes when validations fail
• Broken Rails neo4j:migrate_v8 generator

Changed

• count method in associations, now always fire the database like AR does
• Neo4j now passes all association validations specs, taken from AR (thanks @klobuczek)

[8.0.0.alpha.10] 2016-09-16

Fixed

• Remove blank objects from association results to be compatible with ActiveRecord (see #1276 / thanks klobuczek)
• Allow https scheme in the NEO4J_URL (see #1287 / thanks jacob-ewald)

[8.0.0.alpha.9] 2016-09-14

Fixed

• String / symbol issue for session types in railtie
• Put in fix for allowing models to reload for wrapping nodes / relationshps

[8.0.0.alpha.8] 2016-09-14

Fixed

• Issues with railtie

[8.0.0.alpha.7] 2016-09-13

Changed

• Multiple sessions in Rails config no longer supported

[8.0.0.alpha.6] 2016-09-12

Fixed

• Instead of using session_type, session_url, session_path, and session_options in config session.type, session.url, session.path, and session.options should now be used.
• Issue where session_url (now session.url) was not working
• Broken sessions when threading

[8.0.0.alpha.5] 2016-09-08

Fixed

• Various issues with not be able to run migrations when migration were pending (see 22b7e6aaadd46c11d421b4dac8d3fb15f663a4c4)

[8.0.0.alpha.4] 2016-09-08

Added

• A Neo4j::Migrations.maintain_test_schema! method, to keep the test database up to date with schema changes. (see #1277)
• A Neo4j::Migrations.check_for_pending_migrations! method, that fails when there are pending migration. In Rails, it's executed automatically on startup. (see #1277)
• Support for ForbiddenAttributesProtection API from ActiveRecord. (thanks ProGM, see #1245)

Changed

• ActiveNode#destroy and ActiveRel#destroy now return the object in question rather than true to be compatible with ActiveRecord (see #1254)

Fixed

• Bugs with using neo_id as ActiveNode id_property (thanks klobuczek / see #1274)

[8.0.0.alpha.3]

Skipped

[8.0.0.alpha.2] 2016-08-05

Changed

• Improve migration output format / show execution time in migrations

Fixed

• Caching of model index and constraint checks
• Error when running schema migrations. Migrations now give a warning and instructions if a migration fails and cannot be recovered
• Error when running rake tasks to generate "force" creations of indexes / constraints and there is no migration directory
• WARNING is no longer displayed for constraints defined from id_property (either one which is implict or explict)

[8.0.0.alpha.1] 2016-08-02

Changed

• Improved QueryProxy and AssociationProxy #inspect method to show a result preview (thanks ProGM / see #1228 #1232)
• Renamed the old migration task to neo4j:legacy_migrate
• Renamed the ENV variable to silence migrations output from silenced to MIGRATIONS_SILENCED
• Changed the behavior with transactions when a validation fails. This is a potentially breaking change, since now calling save would not fail the current transaction, as expected. (thanks ProGM / see #1156)
• Invalid options to the property method now raise an exception (see #1169)
• Label #indexes/#constraints return array without needing to access [:property_keys]
• server_db server type is no longer supported. Use http instead to connect to Neo4j via the HTTP JSON API

Added

• Allow to pass a Proc for a default property value (thanks @knapo / see #1250)
• Adding a new ActiveRecord-like migration framework (thanks ProGM / see #1197)
• Adding a set of rake tasks to manage migrations (thanks ProGM / see #1197)
• Implemented autoloading for new and legacy migration modules (there's no need to require them anymore)
• Adding explicit identity method for use in Query strings (thanks brucek / see #1159)
• New adaptor-based API has been created for connecting to Neo4j (See the upgrade guide). Changes include:
• The old APIs are deprecated and will be removed later.
• In the new API, there is no such thing as a "current" session. Users of neo4j-core must create and maintain references themselves to their sessions
• New Neo4j::Core::Node and Neo4j::Core::Relationshp classes have been created to provide consistent results between adaptors. Neo4j::Core::Path has also been added
• New API is centered around Cypher. No special methods are defined to, for example, load/create/etc... nodes/relationships
• There is now a new API for making multiple queries in the same HTTP request
• It is now possible to subscribe separately to events for querying in different adaptors and for HTTP requests (see the docs)
• Schema queries (changes to indexes/constraints) happen in a separate thread for performance and reduce the complexity of the code
• New session API does not include replacement for on_next_session_available
• Adding a migration helper to mass relabel migrations (thanks @JustinAiken / see #1166 #1239)
• Added support for find_or_initialize_by and first_or_initialize methods from ActiveRecord (thanks ProGM / see #1164)
• Support for using Neo4j-provided IDs (neo_id) instead of UUID or another Ruby-provided ID. (Huge thanks to @klobuczek, see #1174)

Fixed

• Made some memory optimizations (thanks ProGM / see #1221)

[7.2.3] - 09-28-2016

Fixed

• as resetting scope of the current query chain (see #1298)

[7.2.2] - 09-22-2016

Fixed

• where clause with question mark parameter and array values only using the first element (see #1247 #1290)

[7.2.1] - 09-19-2016

Fixed

• During ActiveRel create, node and rel property values formatted like Cypher props ({val}) were interpreted as props, causing errors.

[7.2.0] - 08-23-2016

Added

• Backporting #1245 to 7.x versions. It implements the ForbiddenAttributesProtection API from ActiveRecord.

[7.1.4] - 09-20-2016

Fixed

• where clause with question mark parameter and array values only using the first element (see #1247 #1290)

[7.1.3] - 08-18-2016

Changed

• Default value for enum is nil instead of the first value. This is a BREAKING change but is being released as a patch because the original behavior was considered a bug. See this pull request (thanks to ProGM and andyweiss1982)

[7.1.2] - 08-01-2016

Fixed

• Fixed issue where the label wrapping cache would get stuck

[7.1.1] - 07-22-2016

Fixed

• AssociationProxy changed so that pluck can be used in rails/acivesupport 5 (thanks ProGM / see #1243)

[7.1.0] - 07-14-2016

Changed

• Gemspec dependency requirements were modified where ActiveModel, ActiveSupport, and Railties are concerned. The gem now requires >= 4.0, < 5.1.
• ActiveModel::Serializers::Xml is only included if supported if available.

[7.0.16] - 09-20-2016

Fixed

• where clause with question mark parameter and array values only using the first element (see #1247 #1290)

[7.0.15] - 08-18-2016

Changed

• Default value for enum is nil instead of the first value. This is a BREAKING change but is being released as a patch because the original behavior was considered a bug. See this pull request (thanks to ProGM and andyweiss1982)

[7.0.14] - 07-10-2016

Fixed

• Bug in setting NEO4J_TYPE (thanks bloomdido / see #1235)

[7.0.12] - 06-27-2016

Fixed

• Bug where models weren't being loaded correctly by label (thanks bloomdido / see #1220)

[7.0.11] - 06-09-2016

Fixed

• Fix dipendence from JSON when using outside of rails (thanks ProGM)

[7.0.10] - 06-07-2016

Fixed

• Calling .create on associations shouldn't involve extra queries (thanks for the report from rahulmeena13 / see #1216)

[7.0.9] - 05-30-2016

Fixed

• Fix to parens in Cypher query for with_associations for Neo4j 3.0 (thanks ProGM / see #1211)

[7.0.8] - 05-27-2016

Fixed

• Fix to find_in_batches (thanks to ProGM / see #1208)

[7.0.7] - 05-26-2016

Fixed

• Allow models to use their superclass' scopes (forward-ported from 6.1.11 / thanks to veetow for the heads-up / see #1205)

[7.0.6] - 05-11-2016

Added

• Explination about why you can't have an index and a constraint at the same time

[7.0.5] - 05-06-2016

Fixed

• Added parens to delete_all query to support new required syntax in Neo4j 3.0

[7.0.4] - 05-06-2016

Fixed

• A bug/inconsistency between ActiveNode's class method create and instance save led to faulty validation of associations in some cases.

[7.0.3] - 04-28-2016

Fixed

• Added parens to queries to support new required syntax in Neo4j 3.0

[7.0.2] - 04-10-2016

Fixed

• Multiparameter Attributes for properties of type Time were failing due to a hack that should have been removed with ActiveAttr's removal
• Rel creation factory was not using backticks around rel type during create action.

[7.0.1] - 03-22-2016

Fixed

• Conversion of string values from form inputs (thanks to jbhannah / see #1163)

[7.0.0] - 03-18-2016

No changes from rc.7

[7.0.0.rc.7] - 03-16-2016

Changed

• with_associations now generates separate OPTIONAL MATCH clauses, separated by WITH clauses and is preceeded by a WITH clause.

[7.0.0.rc.6] - 03-16-2016

Fixed

• Question mark methods (node.foo?) broke when ActiveAttr was removed

[7.0.0.rc.5] - 03-14-2016

Fixed

• Fixed issue where backticks weren't being added to where clauses for with_associations

[7.0.0.rc.4] - 03-11-2016

Fixed

• Catching errors for 404s in Rails (thanks ProGm, see #1153)

[7.0.0.rc.3] - 03-08-2016

Fixed

• Allow for array values when querying for enums (i.e. where(enum_field: [:value1, :value2])) (see #1150)

[7.0.0.rc.2] - 03-08-2016

Fixed

• Issue where creating relationships via has_one association created two relationships (forward ported from 6.0.7 / 6.1.9)

[7.0.0.rc.1] - 03-08-2016

Changed

• All explicit dependencies on ActiveAttr code that was not removed outright can now be found in the Neo4j::Shared namespace.
• All type conversion uses Neo4j.rb-owned converters in the Neo4j::Shared::TypeConverters namespace. This is of particular importance where Boolean is concerned. Where explicitly using ActiveAttr::Typecasting::Boolean, use Neo4j::Shared::Boolean.
• Neo4j::Shared::TypeConverters.converters was replaced with Neo4j::Shared::TypeConverters::CONVERTERS.
• Error classes refactor: All errors now inherits from Neo4j::Error. All specific InvalidParameterError were replaced with a more generic Neo4j::InvalidParameterError.
• When calling Node.find(...) with missing ids, Neo4j::RecordNotFound now returns a better error message and some informations about the query.

Internal

• Ran transpec and fixed error warning (thanks brucek / #1132)

Added

• A number of modules and unit tests were moved directly from the ActiveAttr gem, which is no longer being maintained.
• ActiveNode models now respond to update_all (thanks ProGM / #1113)
• Association chains now respond to update_all and update_all_rels (thanks ProGM / #1113)
• Rails will now rescue all Neo4j::RecordNotFound errors with a 404 status code by default
• A clone of ActiveRecord::Enum API. See docs for details. (thanks ProGM / #1129)
• Added #branch method to QueryProxy to allow for easy branching of matches in association chains (thanks ProGM / #1147 / #1143)
• The .match method on ActiveNode model class has changed to allow a second argument which takes on_create, on_match, and set keys. These allow you to define attribute values for the Cypher MERGE in the different cases (thanks leviwilson / see #1123)

Removed

• All external ActiveAttr dependencies.
• All call class methods from Type Converters. Use to_ruby instead.
• Neo4j::ActiveNode::Labels::InvalidQueryError, since it's unused.

[6.1.12] - 05-27-2016

Fixed

• Fix to find_in_batches (thanks to ProGM / see #1208)

[6.1.11] - 05-25-2016

Fixed

• Allow models to use their superclass' scopes (thanks to veetow for the heads-up / see #1205)

[6.1.10] - 03-14-2016

Fixed

• Fixed issue where backticks weren't being added to where clauses for with_associations

[6.1.9] - 2016-03-08

Fixed

• Issue where creating relationships via has_one association created two relationships (forward ported from 6.0.7)

[6.1.8] - 2016-03-02

Fixed

• The @attributes hash of the first node of each class returned from the database would have have the wrong id property key. This did not appear to cause any problems accessing the value and would be normal for subsequent saves of the affected node as well as all other nodes.

[6.1.7] - 2016-02-16

Fixed

• Bug related to creating subclassed nodes alongside rels in ActiveRel. (#1135. Thanks, brucek!)

[6.1.6] - 2016-02-03

Added

• wait_for_connection configuration variable allows you to tell the gem to wait for up to 60 seconds for Neo4j to be available. This is useful in environments such as Docker Compose

[6.1.5] - 2016-01-28

Fixed

• Calls to .find/.find_by_id/.find_by_ids now respect scopes and associations

[6.1.4] - 2016-01-26

Fixed

• Model generators now respect module namespaces (thanks to michaeldelorenzo in #1119)

[6.1.3] - 2016-01-20

Fixed

• Issue where ActiveRel.create would not work with RelatedNode (rel.from_node) instances (Thanks, djvs #1107)

[6.1.2] - 2016-01-19

Fixed

• Issue where inspect failed outside of Rails (Thanks to louspringer, #1111)

[6.1.1] - 2016-01-01

Fixed

• Fixed version requirement for neo4j-core in gemspec

[6.1.0] - 2016-01-01

Changed

• When a model_class is specified on an association which is not an ActiveNode model, an error is raised
• The model_class option on associations can no longer be a Class constant (should be a String, Symbol, nil, false, or an Array of Symbols/Strings)
• The rel_class option on associations can no longer be a Class constant (should be a String, Symbol, or nil)
• The from_class and to_class arguments can no longer be a Class constant (should be a String, Symbol, :any, or false)
• ActiveNode and ActiveRel models can now be marshaled (thanks to jhoffner for the suggestion in #1093)

Fixed

• Inheritance of properties in ActiveRel is fixed (see #1080)

Added

• config/neo4j.yml now renders with an ERB step (thanks to mrstif via #1060)
• #increment, #increment! and #concurrent_increment! methods added to instances of ActiveNode and ActiveRel (thanks to ProGM in #1074)

[6.0.9] - 05-27-2016

Fixed

• Fix to find_in_batches (thanks to ProGM / see #1208)

[6.0.8] - 03-14-2016

Fixed

• Fixed issue where backticks weren't being added to where clauses for with_associations

[6.0.7] - 03-08-2016

Fixed

• Issue where creating relationships via has_one association created two relationships

[6.0.6] - 01-20-2016

Fixed

• Issue where inspect failed outside of Rails (Thanks to louspringer, #1111)

[6.0.5] - 12-29-2015

Fixed

• If a property and a scope have the same name, a "Stack level too deep" error occurs. Fixed by removing the instance method which scopes define. Could break something, but I very much doubt anybody is using this, and if they are it's likely a bug (#1088)

[6.0.4] - 12-23-2015

Fixed

• When a model_class is specified on an association which is not an ActiveNode model, an error is raised

[6.0.3] - 12-18-2015

Fixed

• Fixed issue where find_or_create was prioritizing property`s default value rather than what was being passed in (Thanks to brucek via #1071)

[6.0.2] - 12-16-2015

Fixed

• Fixed issue where association setting can't be set on initialize via #new (#1065)

[6.0.1] - 11-27-2015

Fixed

• #with_associations should use multiple OPTIONAL MATCH clauses instead of one so that matches are independent (behavior changed in Neo4j 2.3.0) (forward ported from 5.2.15)

[6.0.0] - 11-24-2015

Fixed

• Refactor unpersisted association logic to store objects directly on the object rather than the association proxy since different association proxies may be created at different times (see #1043)

[6.0.0.rc.4] - 11-19-2015

Fixed

• Following a '#with' with a '#count' no longer causes issues with variables specified twice

[6.0.0.rc.3] - 11-18-2015

Fixed

• Removed extra MATCH which occurs from proxy_as calls

[6.0.0.rc.2] - 11-17-2015

Changed

• QueryProxy#<< and #create, when rel_class option is set, will use RelClass.create! instead of create to alert the user of failed rel creations.

[6.0.0.rc.1] - 11-13-2015

This release contains no changes since the last alpha. Below are all modifications introduced in alpha releases.

Changed

• _classname property has been completely removed, officially dropping support for Neo4j < 2.1.5.
• ActiveRel#creates_unique and the :unique Association option take arguments to control how the query is built. See #1038.
• #<< and #create methods on associations now create with the rel_class when available so that validations/callbacks/defaults are all used as expected
• Allow calling of #method= methods via model new method Hash argument
• Remove uniqueness validation for id_property because we already have Neo4j constraints
• Improved eager loading when no with_associations is specified (see #905)
• Change size and length so that they match expected Ruby / ActiveRecord behavior (see http://stackoverflow.com/questions/6083219/activerecord-size-vs-count and #875)
• Refactoring around indexing and constraints in Neo4j::ActiveNode. The public interfaces are unchanged.
• Neo4j::Shared::DeclaredPropertyManager was renamed Neo4j::Shared::DeclaredProperties. All methods referencing the old name were updated to reflect this.
• Methods that were using Neo4j::Session#on_session_available were updated to reflect the upstream change to on_next_session_available.
• rel_where will now use ActiveRel classes for type conversion, when possible.
• Converters will look for a converted? method to determine whether an object is of the appropriate type for the database. This allows converters to be responsible for multiple types, if required.
• Removed the ability to set both an exact index and unique constraint on the same property in a model. Unique constraints also provide exact indexes.
• Deprecated all methods in ActiveRel's Query module except for those that allow finding by id.
• Return true on successful #save! calls (Thanks to jmdeldin)

Added

• Optional three-argument signature for ActiveRel#create and #create!, just like initialize.
• Alternate ActiveRel init syntax: RelClass.new(from_node, to_node, args). This is optional, so giving a single hash with props with or without nodes is still possible.
• ActiveRel create actions can now handle unpersisted nodes.
• rel_order method for association chaining
• Support config/neo4j.yaml
• Look for ENV variables for Neo4j URL / path for Rails apps
• New classes for schema operations, predictably called Neo4j::Schema::Operation and subclasses UniqueConstraintOperation and ExactIndexOperation. These provide methods to aid in the additional, removal, and presence checking of indexes and constraints.
• A few methods were added to Neo4j::Shared::DeclaredProperties to make it easier to work with. In particular, [key] acts as a shortcut for DeclaredProperties#registered_properties.
• Type Converters were added for String, Integer, Fixnum, BigDecimal, and Boolean to provide type conversion for these objects in QueryProxy.
• Support for Array arguments to ActiveRel's from_class and to_class.

Fixed

• Regression RE: properties being overwritten with their defaults on save in alpha.10.
• Long properties in ActiveNode/ActiveRel #inspect are truncated
• Property defaults are set initially when an instance of a model is loaded, then checked again before save to ensure valid? works.
• QueryProxy was not converting Boolean properties correctly
• Certain actions that were intended as once-in-the-app's-lifetime events, notably schema operations, will only occur immediately upon the first session's establishment.
• Context now set for Model.all QueryProxy so that logs can reflect that it wasn't just a raw Cypher query

Removed

• Railtie was removing username/password and putting them into the session options. This has been unneccessary in neo4j-core for a while now

[6.0.0.alpha.12] - 11-5-2015

Changed

• _classname property has been completely removed, officially dropping support for Neo4j < 2.1.5.
• ActiveRel#creates_unique and the :unique Association option take arguments to control how the query is built. See #1038.

Added

• Optional three-argument signature for ActiveRel#create and #create!, just like initialize.

[6.0.0.alpha.11] - 11-3-2015

Fixed

• Regression RE: properties being overwritten with their defaults on save in alpha.10.

Changed

• #<< and #create methods on associations now create with the rel_class when available so that validations/callbacks/defaults are all used as expected
• Allow calling of #method= methods via model new method Hash argument

Added

• Alternate ActiveRel init syntax: RelClass.new(from_node, to_node, args). This is optional, so giving a single hash with props with or without nodes is still possible.

[6.0.0.alpha.10] - 11-2-2015

Fixed

• Long properties in ActiveNode/ActiveRel #inspect are truncated
• Property defaults are set initially when an instance of a model is loaded, then checked again before save to ensure valid? works.

Added

• ActiveRel create actions can now handle unpersisted nodes.

[6.0.0.alpha.9] - 10-27-2015

Fixed

• uninitialized constant Neo4j::Core::CypherSession error

[6.0.0.alpha.8] - 10-19-2015

Added

• rel_order method for association chaining

[6.0.0.alpha.7] - 10-19-2015

Changed

• Remove uniqueness validation for id_property because we already have Neo4j constraints

Added

• Support config/neo4j.yaml

[6.0.0.alpha.6] - 10-18-2015

Changed

• Improved eager loading when no with_associations is specified (see #905)

[6.0.0.alpha.5] - 10-18-2015

Changed

• Change size and length so that they match expected Ruby / ActiveRecord behavior (see http://stackoverflow.com/questions/6083219/activerecord-size-vs-count and #875)

[6.0.0.alpha.4] - 10-17-2015

Fixed

• QueryProxy was not converting Boolean properties correctly

[6.0.0.alpha.3] - 10-14-2015

Removed

• Railtie was removing username/password and putting them into the session options. This has been unneccessary in neo4j-core for a while now

[6.0.0.alpha.2] - 10-14-2015

Added

• Look for ENV variables for Neo4j URL / path for Rails apps

[6.0.0.alpha.1] - 10-12-2015

Changed

• Refactoring around indexing and constraints in Neo4j::ActiveNode. The public interfaces are unchanged.
• Neo4j::Shared::DeclaredPropertyManager was renamed Neo4j::Shared::DeclaredProperties. All methods referencing the old name were updated to reflect this.
• Methods that were using Neo4j::Session#on_session_available were updated to reflect the upstream change to on_next_session_available.
• rel_where will now use ActiveRel classes for type conversion, when possible.
• Converters will look for a converted? method to determine whether an object is of the appropriate type for the database. This allows converters to be responsible for multiple types, if required.
• Removed the ability to set both an exact index and unique constraint on the same property in a model. Unique constraints also provide exact indexes.
• Deprecated all methods in ActiveRel's Query module except for those that allow finding by id.
• Return true on successful #save! calls (Thanks to jmdeldin)

Added

• New classes for schema operations, predictably called Neo4j::Schema::Operation and subclasses UniqueConstraintOperation and ExactIndexOperation. These provide methods to aid in the additional, removal, and presence checking of indexes and constraints.
• A few methods were added to Neo4j::Shared::DeclaredProperties to make it easier to work with. In particular, [key] acts as a shortcut for DeclaredProperties#registered_properties.
• Type Converters were added for String, Integer, Fixnum, BigDecimal, and Boolean to provide type conversion for these objects in QueryProxy.
• Support for Array arguments to ActiveRel's from_class and to_class.

Fixed

• Certain actions that were intended as once-in-the-app's-lifetime events, notably schema operations, will only occur immediately upon the first session's establishment.
• Context now set for Model.all QueryProxy so that logs can reflect that it wasn't just a raw Cypher query

[5.2.15] - 11-27-2015

Fixed

• #with_associations should use multiple OPTIONAL MATCH clauses instead of one so that matches are independent (behavior changed in Neo4j 2.3.0)

[5.2.13] - 10-26-2015

Fixed

• Fixed #after_initialize and #after_find callbacks.
• The #touch method should to raise errors when unsuccessful and avoid #attributes for performance.

[5.2.12] - 10-25-2015

Fixed

• Fix the #touch method for ActiveNode and ActiveRel

[5.2.11] - 10-18-2015

Fixed

• Unable to give additional options as first argument to chained QueryProxy method

[5.2.10] - 10-14-2015

Fixed

• has_one does not define _id methods if they are already defined. Also use method_defined? instead of respond_to? since it is at the class level

[5.2.9] - 09-30-2015

Fixed

• Better error message for ActiveRel creation when from_node|to_node is not persisted

[5.2.8] - 09-30-2015

Fixed

• Support references in model/scaffold generators

[5.2.7] - 09-25-2015

Fixed

• Allow for association model_class to be prepended with double colons

[5.2.6] - 09-16-2015

Fixed

• Fixed issue where caching an association causes further queries on the association to return the cached result

[5.2.5] - 09-11-2015

Fixed

• Regression in last release caused properties to revert to default on update if not present in the properties for update

[5.2.4] - 09-11-2015

Fixed

• Use debug log level for query logging
• updated_at properties were not being added up update events, only updated.
• Default values of Boolean properties were not being set when default: false
• props_for_update was using String keys instead of Symbols, like props_for_update
• props_for_create and props_for_update were not adding default property values to the hash.
• ActiveNode's merge and find_or_create methods were not setting default values of declared properties when ON CREATE was triggered. The code now uses props_for_create.

[5.2.3] - 09-07-2015

Added bugfixes from 5.1.4 and 5.1.5 that were missed in earlier 5.2.x releases:

• AssociationProxy now responds to serializable_hash so that include can be used in render json in Rails controllers
• Fixed errors when trying to call #{association}_ids= on an unpersisted node with UUIDs or an array thereof.
• Removed extra Cypher query to replace relationships when working with unpersisted nodes and association=.
• Bug related to Rails reloading an app and returning nodes without first reinitializing models, resulting in CypherNodes.

[5.2.2] - 09-06-2015

Fixed

• Fixed setting of association(_id|_ids) on .create

[5.2.1] - 09-04-2015

Fixed

• Now possible to configure record_timestamps with rails config

[5.2.0] - 08-30-2015

Added

• props_for_persistence, props_for_create, props_for_update instance methods for all nodes and rels. Each returns a hash with properties appropriate for sending to the database in a Cypher query to create or update an object.
• Added record_timestamps configuration do default all ActiveNode and ActiveRel models to have created_at and updated_at timestamps (from #939, thanks @rebecca-eakins)
• Added timestamp_type configuration to specify how timestamps should be stored (from #939, thanks @rebecca-eakins)

Changed

• Methods related to basic node and rel persistence (save, create_model, _create_node, others) were refactored to make the processes simpler, clearer, and slightly faster.
• Unit test directory structure was rearranged to mirror the lib directory.

[5.1.3] - 08-23-2015

Fixed

• has_one associations are now properly cached (like has_many associations)
• QueryProxy now responds to #to_ary. Fixes integration with ActiveModelSerializer gem

[5.1.2] - 08-20-2015

Fixed

• When association has model_class and type: false the association doesn't work (see: #930)

[5.1.1] - 08-19-2015

Fixed

• Fixed a bug where the Neo4j::Timestamps mixin was not able to be included

[5.1.0.rc.3] - 08-17-2015

Fixed

• Associations defined in ActiveNode models will delegate unique? to the model set in rel_class. This makes it easier for the rel class to act as the single source of truth for relationship behavior.

Added

• ActiveRel: #{related_node}_neo_id instance methods to match CypherRelationship. Works with start/from and end/to.
• ActiveRel: type now has a new alias, rel_type. You might recognize this from the (Cypher|Embedded)Relationship class and ActiveNode association option.
• Contributing to the gem? Rejoice, for it now supports Dotenv.

[5.1.0.rc.2] - 08-16-2015

Added

• Ability to use #where_not method on ActiveNode / QueryProxy

[5.1.0.rc.1] - 08-14-2015

Fixed

• Added a before_remove_const method to clear cached models when Rails reload! is called. 5.0.1 included a workaround but this appears to cut to the core of the issue. See #855.
• To prevent errors, changing an index to constraint or constraint to index will drop the existing index/constraint before adding the new.
• Fixed AssociationProxy#method_missing so it properly raises errors.

Added

• Added ability to view model_class from Association class for rails_admin Neo4j adapter
• QueryProxy where will now look for declared properties matching hash keys. When found, it will send the value through that property's type converter if the type matches the property's unconverted state.
• Improved handling of unpersisted nodes with associations. You can now use << to create associations between unpersisted nodes. A save will cascade through unpersisted objects, creating nodes and rels along the way. See #871
• Support formatted cypher queries for easy reading by humans via the pretty_logged_cypher_queries configuration variable
• Ability to query for just IDs on associations
• On QueryProxy objects you can now use an :id key in where and find_by methods to refer to the property from id_property (uuid by default)
• Added ActiveRel.creates_unique and deprecated ActiveRel.creates_unique_rel
• Added #inspect method to ActiveRel to show Cypher-style representation of from node, to node, and relationship type
• Added Neo4j::Timestamps, Neo4j::Timestamps::Created, and Neo4j::Timestamps::Updated mixins to add timestamp properties to ActiveNode or ActiveRel classes

Changed

• Methods related to ActiveNode's IdProperty module were refactored to improve performance and simplify the API. Existing default_properties methods were reworked to reflect their use as-implemented: storage for a single default property, not multiple.
• Implementation adjustments that improve node and rel initialization speed, particularly when loading large numbers of objects from the database.

[5.0.15] - 08-12-2015

Fixed

• reload! within Rails apps will work correctly. An earlier release included a workaround but this uses ActiveModel's system for clearing caches to provide a more thorough resolution.

[5.0.14] - 08-09-2015

Fixed

• Calling all on a QueryProxy chain would cause the currently set node identity within Cypher to be lost.

[5.0.13] - 08-07-2015

Fixed

• Backport AssociationProxy#method_missing fix to raise errors on invalid methods
• Fix the count issue on depth two associations (#881)

[5.0.12] - ?

Fixed

• Break between associations so that potential where clauses get applied to the correct (OPTIONAL )MATCH clause

Fixed

• Delegate first and last from AssociationProxy to QueryProxy
• Fix order behavior for first and last in QueryProxy

[5.0.11] - ?

Fixed

• Delegate first and last from AssociationProxy to QueryProxy
• Fix order behavior for first and last in QueryProxy

[5.0.10] - 2015-07-31

Fixed

• Fix what should have been a very obvious bug in _active_record_destroyed_behavior behavior
• Add eager loading to QueryProxy so that it works in all expected places

[5.0.9] - 2015-07-29

Fixed

• "NameError: uninitialized constant Class::Date" (#852)

[5.0.8] - 2015-07-26

Changed

• Copied QueryClauseMethods doc from master

[5.0.7] - 2015-07-26

Changed

• Copied docs folder from master because a lot of work had gone into the docs since 5.0.0 was released

[5.0.6] - 2015-07-22

Fixed

• Fix query logging so that by default it only outputs to the user in the console and development server. Logger can be changed with neo4j.config.logger configuration option

[5.0.5] - 2015-07-19

Added

• Added log_cypher_queries configuration option so that queries aren't on by default but that they can be controlled

[5.0.4] - 2015-07-17

Fixed

• Fixed bug which caused QueryProxy context to repeat (showed up in query logging)

[5.0.3] - 2015-07-14

Changed

• Moved #with_associations method from AssociationProxy to QueryProxy so that all QueryProxy chains can benefit from it.
• Added _active_record_destroyed_behavior semi-hidden configuration variable so that behavior for ActiveNode#destroyed? and ActiveRel#destroyed? can be changed to upcoming 6.0.0 behavior (matching ActiveRecord) where the database is not accessed.

[5.0.2] - 2015-06-30

Fixed

• Fix error when calling #empty? or #blank? on a query chain with on order specified
• Make #find_each and #find_in_batches return the actual objects rather than the result objects
• Query logging on console should be to STDOUT with puts. Using Rails.logger outputs to the file in the log directory
• Modified queryproxy include? to accept a uuid instead of full node

[5.0.1] - 2015-06-23

Fixed

• Longstanding bug that would prevent association changes (<< and ActiveRel.create) in Rails after reload! had been called, see #839
• ActiveNode#inspect wasn't displaying the id_property
• Default property values and magic typecasting not being inherited correctly

Changed

• In the absense of a model_class key, associations defined in ActiveNode models will use from_/to_class defined in rel_class to find destination. (Huge thanks to @olance, #838)
• ActiveRel's DSL was made a bit friendlier by making the type, from_class and to_class methods return their set values when called without arguments.
• Reworked ActiveRel's wrapper to behave more like ActiveNode's, removing some duplicate methods and moving others to Neo4j::Shared, resulting in a big performance boost when returning large numbers of rels.
• Updated gemspec to require neo4j-core 5.0.1+

Added

• ActiveRel was given find_or_create_by, usable across single associations.

[5.0.0] - 2015-06-18

Fixed

• Prevented to_key from requiring an extra DB query. (See #827)

Added

• QueryProxy associations accept labels: false option to prevent generated Cypher from using labels.

Changed

• Properties explicitly set to type Time will no longer be converted to DateTime.

[5.0.0.rc.3] - 2015-06-07

Fixed

• Associations now allow unique option. Error handling is generalized to make this testable (Thanks to @olance, see #824)

[5.0.0.rc.2] - 2015-05-20

Changed

• Set Ruby version requirement back to 1.9.3 because of problems with JRuby

[5.0.0.rc.1] - 2015-05-20

Changed

• Ruby 2.0.0 now required (>= 2.2.1 is recommended)
• All ActiveNode associations now require either a type, origin, or rel_class option. Only one is allowed
• Defining associations will fail if unknown options are used (#796)
• Model#find fails if no node found (Model#find_by available when nil result desired) (#799)
• #find_or_create and #merge model class methods have been added
• Ensuring that all model callbacks are happening within transactions
• Major refactoring using rubocop with a lot of focus on speed improvements
• Specifically when loading many nodes at once we've measured 3x speed improvements

Fixed

• #find on QueryProxy objects now does a model find rather than an Enumerable find
• Subclassed model classes now both create and query against it's ancestor's labels in addition to it's own (#690)
• #first and #last now work property when precedend by an #order in a QueryProxy chain (#720)
• #count when called after #limit will be performed within the bounds of limit specified

Added

• Eager Loading is now supported! See: [http://neo4jrb.readthedocs.org/en/latest/ActiveNode.html#eager-loading]
• Associations now return AssociationProxy objects (which are Enumerable) which have convenient #inspect methods for cleaner viewing in the Ruby console
• model_class key on associations now supports an Array (#589)
• When using all inside of a class method an argument for the node name can now be passed in (#737)
• Query(Proxy) syntax of where("foo = ?", val) and where("foo = {bar}", bar: val) now supported (#675)
• module_handling config option now available to control how class module namespaces translate to Neo4j labels (#753) (See: [http://neo4jrb.readthedocs.org/en/latest/Configuration.html])
• #id_property method has new constraints option to disable automatic uuid constraint (#738/#736)

(There are probably other changes too!)

Changes above this point should conform to [http://keepachangelog.com/]

[4.1.2]

• Fixes two bugs related to inheritance: one regarding ActiveRel classes and relationship types, the other regarding ActiveNode primary_key properties not being set when a model is loaded prior to Neo4j session.

[4.1.1]

• Switches use of Fixnum to Integer to improve 32-bit support

[4.1.0]

This release includes many performance fixes and new features. The most notable:

• Huge stylist cleanup/refactoring by Brian on the entire gem by Brian armed with Rubocop. See http://neo4jrb.io/blog/2014/12/29/stay-out-of-trouble.html.
• Every node create, update, and destroy is now wrapped in a transaction. See http://neo4jrb.io/blog/2015/01/06/transactions_everywhere.html.
• New dependent options for associations: :delete, :destroy, :delete_orphans, :destroy_orphans. See http://neo4jrb.io/blog/2015/01/07/association_dependent_options.html.
• New unique: true option for associations, creates_unique_rel class method for ActiveRel. Both of these will result in relationship creation Cypher using "CREATE UNIQUE" instead of "CREATE".
• Fixed an n+1 query issue during node creation and update.
• Dieter simplified some code related to frozen attributes. See #655. We now have a new website online at http://neo4jrb.io! Keep an eye on it for news and blogs related to this and other projects.

[4.0.0]

• Change neo4j-core dependency from 3.1.0 to 4.0.0.

[4.0.0.rc.4]

• _classname property is disabled by default for ActiveRel! It had been disabled for ActiveNode, this just evens the score.
• Fixes a bug to create better result labels in Cypher.
• Made the delete_all and destroy_all ActiveNode class methods consistent with their ActiveRecord counterparts. destroy_all previously performed its deletes in Cypher but it should have been returning nodes to Ruby and calling destroy. delete_all didn't exist at all.

[4.0.0.rc.3]

Released minutes after rc.2 to catch one late addition!

• Adds serialization support for QueryProxy.

[4.0.0.rc.2]

This release builds on features introduced in the first RC. We are releasing this as another RC because the API may be tweaked before release.

• New proxy_as for Core::Query to build QueryProxy chains onto Core::Query objects!
• Using proxy_as, new optional method in QueryProxy to use the OPTIONAL MATCH Cypher function.
• match_to and methods that depend on it now support arrays of nodes or IDs.
• New rels_to/all_rels_to methods.
• New delete and destroy methods in QueryProxy to easily remove relationships.
• Serialized objects will include IDs by default.

[4.0.0.rc.1]

This release introduces API changes that may be considered breaking under certain conditions. See See https://github.com/neo4jrb/neo4j/wiki/Neo4j.rb-v4-Introduction. Please use https://github.com/neo4jrb/neo4j/issues for support regarding this update! You can also reach us on Twitter: @neo4jrb (Brian) and @subvertallmedia (Chris).

• Default behavior changed: relationship types default to all caps, no prepending of "#". This behavior can be changed.
• ActiveRel models no longer require explicit calling of type. When missing, the model will infer a type using the class name following the same rules used to determine automatic relationship types from ActiveNode models.
• _classname properties will not be added automatically if you are using a version Neo4j >= 2.1.5. Instead, models are found using labels or relationship type. This is a potentially breaking change, particularly where ActiveRel is concerned. See the link at the beginning of this message for the steps required to work around this.
• Query scopes are now chainable! Call all at the start of your scope or method to take advantage of this.
• Changes required for Neo4j 2.2.
• Support for custom typecasters.
• New method rel_where, expanded behavior of match_to and first_rel_to
• Implemented ActiveSupport load hooks.
• Assorted performance improvements and refactoring.

[3.0.4]

• Gemspec requires the latest neo4j-core.
• Fixed a pagination bug — thanks, @chrisgogreen!
• New QueryProxy methods match_to and first_rel_to are pretty cool.
• include_root_in_json is now configurable through config.neo4j.include_root_in_json or Neo4j::Config[:include_root_in_json]. Also cool.
• There's a new delete_all method for QueryProxy, too.
• @codebeige removed the include? class method, which was smart.
• Did I mention we won an award from Neo Tech? Check it out. https://github.com/neo4jrb/neo4j#welcome-to-neo4jrb

[3.0.3]

• Gemspec has been updated to require neo4j-core 3.0.5
• Added find_in_batches
• Pagination has been updated to allow better ordering. Relaunch of neo4j-will_paginate as neo4j-will_paginate_redux is imminent!
• Everything is better: create's handling of blocks, better behavior from count, better ActiveRel from_class/to_class checks, better handling of rel_class strings, and more
• Added a new find_or_create_by class method

Big thanks to new contributors Miha Rekar and Michael Perez! Also check out or Github issues, where we're discussing changes for 3.1.0. https://github.com/neo4jrb/neo4j/issues

[3.0.2]

• "Model#all" now evaluates lazily, models no longer include Enumerable
• Faster, more efficient uniqueness validations
• Adjusted many common queries to use params, will improve performance
• ActiveRel fixes: create uses Core Query instead of Core's rels method, { classname: #{_classname} } no longer inserted into every query, find related node IDs without loading the nodes
• Allow inheritance when checking model class on a relation (Andrew Jones)
• Provided migrations will use Rake.original_dir instead of Rails.env to provide better compatibility with frameworks other than Rails
• rel_class option in ActiveNode models will now accept string of a model name
• Additional bug fixes

[3.0.1]

• Removed reference to neo4j-core from Gemfile and set neo4j.gemspec to use neo4j-core ~>3.0.0

[3.0.0]

No change from rc 4

[3.0.0.rc.4]

• UUIDs are now automatically specified on models as neo IDs won't be reliable in future versions of neo4j
• Migrations now supported (including built-in migrations to migrate UUIDs and insert the _classname property which is used for performance)
• Association reflection
• Model.find supports ids/node objects as well as arrays of id/node objects
• rake tasks now get automatically included into rails app

[3.0.0.rc.3]

• thread safety improvements
• scope and general refactoring
• Added ability to create relationships on init (persisted on save)

[3.0.0.rc.2]

• Use newer neo4j-core release

[3.0.0.rc.1]

• Support for count, size, length, empty, blank? for has_many relationship
• Support for rails logger of cypher queries in development
• Support for distinct count
• Optimized methods: https://github.com/andreasronge/neo4j/wiki/Optimized-Methods
• Queries should respect mapped label names (#421)
• Warn if no session is available
• Fix broken == and equality (#424)

[3.0.0.alpha.11]

• Bug fixes

[3.0.0.alpha.10]

• ActiveRel support, see Wiki pages (chris #393)

[3.0.0.alpha.9]

• Complete rewrite of the query api, see wiki page (#406, chris, brian)
• Performance improvements (#382,#400, #402, chris)
• idproperty - user defined primary keys (#396,#389)
• Reimplementation of Neo4j::Config
• Serialization of node properties (#381)
• Better first,last syntax (#379)

[3.0.0.alpha.8]

• Integration with new Query API from neo4j-core including:
• • .query_as and #query_as methods to get queries from models (#366)
• • .qq method for QuickQuery syntax ( https://github.com/andreasronge/neo4j/wiki/Neo4j-v3#quickquery-work-in-progress / #366)
• Before and after callbacks on associations (#373)
• .find / .all / .count changed to be more like ActiveRecord
• .first / .last methods (#378)
• .find_by / .find_by! (#375)

[3.0.0.alpha.7]

• Bug fix uniqueness-validator (#356 from JohnKellyFerguson)
• Many improvements, like update_attributes and validation while impl orm_adapter, Brian Underwood
• Impl orm_adapter API for neo4j so it can be used from for example devise, Brian Underwood (#355)
• Fix of inheritance of Neo4j::ActiveNode (#307)
• Expose add_label, and remove_label (#335)
• Fixed auto loading of classes bug, (#349)
• Bumped neo4j-core, 3.0.0.alpha.16

[3.0.0.alpha.6]

• Support for Heroku URLs, see wiki https://github.com/andreasronge/neo4j/wiki/Neo4j-v3 (#334)

[3.0.0.alpha.5]

• Added allow session options via 'config.neo4j.session_options' so it can run on heroku (#333)
• Relaxed Dependencies for Rails 4.1 (#332)
• Using neo4j-core version 3.0.0.alpha.12

[3.0.0.alpha.4]

• Implemented validates_uniqueness_of (#311)
• Using neo4j-core version 3.0.0.alpha.11

[3.0.0.alpha.3]

• Support for rails scaffolds
• Support for created_at and updated_at (#305)
• Support for ability to select a session to use per model (#299)
• BugFix: updating a model should not clear out old properties (#296)

[3.0.0.alpha.2]

• Support for both embedded (only JRuby) and server API (runs on MRI Ruby !)
• Simple Rails app now work
• Support for has_n and has_one method
• ActiveModel support, callback, validation
• Declared properties (via active_attr gem)

[2.3.0 / 2013-07-18]

• Fix Issue with HA console when ruby-debug is loaded (#261, thekendalmiller)
• Use 1.9 Neo4j

[2.2.4 / 2013-05-19]

• get_or_create should return wrapped ruby nodes, alex-klepa, #241, #246
• Make sure freeze does not have side effects, #235
• Fix for carrierwave-neo4j (attribute_defaults), #235

[2.2.3 / 2012-12-28]

• Support for HA cluster with neo4j 1.9.X, #228, #99, #223
• Make sure the Identity map is cleared after an exception, #214
• Relationship other_node should return wrapped node, #226
• Automatically convert DateTimes to UTC, (neo4j-wrapper #7)
• get_or_create should return a wrapped node (neo4j-wrapper #8)
• Make it work with Neo4j 1.7.1 (neo4j-core, #19)

[2.2.2 - skipped]

[2.2.1 / 2012-12-18]

• Fix for JRuby 1.7.1 and Equal #225
• Fix for create nodes and relationship using Cypher (neo4j-core #17)

[2.2.0 / 2012-10-02]

• Using neo4j-cypher gem (1.0.0)
• Fix of neo4j-core configuration issue using boolean values #218
• Fixed RSpec issue on JRuby 1.7.x #217
• Aliased has_many to has_n, #183

[2.2.0.rc1 / 2012-09-21]

• Use neo4j-core and neo4j-wrapper version 2.2.0.rc1
• Use the neo4j-cypher gem
• Better support for Orm Adapter, #212
• Use Cypher query when finder method does not have a lucene index, #210

[2.0.1 / 2012-06-06]

• Use neo4j-core and neo4j-wrapper version 2.0.1

[2.0.0 / 2012-05-07]

(same as rc2)

[2.0.0.rc2 / 2012-05-04]

• Enable Identity Map by default
• Added versioning for Neo4j::Core

[2.0.0.rc1 / 2012-05-03]

• Fix of rake task to upgrade to 2.0
• Various Cypher DSL improvements, core(#3,#4,#5), #196
• Added Neo4j::VERSION

[2.0.0.alpha.9 / 2012-04-27]

• Fix for rails scaffold generator

[2.0.0.alpha.8 / 2012-04-27]

• Fix for "relationship to :all assigned twice for single instance" #178
• Fix for callback fire more then once (=> performance increase) #172
• Support for lucene search on array properties, #118
• Support for creating unique entities (get_or_create) #143
• Support for specifying has_n/has_one relationship with Strings instead of Class #160
• Support for serializer of hash and arrays on properties #185
• Fix for Neo4j::Rails::Relationship default property, #195
• Added support for pagination, see the neo4j-will_paginate gem
• Fixed Rails generators
• Added Cypher DSL support for is_a?
• Fix for "write_attribute persistes, contrary to AR convention" closes #182

[2.0.0.alpha.7 / 2012-04-19]

• fix for Neo4j::Config bug - did not work from rails to set the db location, closes #191
• has_n and has_one method generate class method returning the name of the relationship as a Symbol, closes #170
• Raise exception if trying to index boolean property, closes #180
• Made start_node= and end_node= protected closes 186
• Support for things like @dungeon.monsters.dangerous { |m| m[:weapon?] == 'sword' } closes #181

[2.0.0.alpha.6 / 2012-04-15]

• Complete rewrite and smaller change of API + lots of refactoring and better RSpecs
• Moved code to the neo4j-core and neo4j-wrapper gems
• Changed API - index properties using the Neo4j::Rails::Model (property :name, :index => :exact)
• Changed API - rel_type always returns a Symbol
• Changed API - #rels and #rel first parameter is always :outgoing, :incoming or :both
• Cypher DSL support, see neo4j-core
• Made the Lucene indexing more flexible
• Renamed size methods to count since it does simply count all the relationships (e.g. Person.all.count)
• Modularization - e.g. make it possible to create your own wrapper
• Added builder method for has_one relationships (just like ActiveRecord build_best_friend)

[2.0.0.alpha.5 / 2012-03-27]

• Fix for HA/cluster bug [#173]
• Upgrade to neo4j-community jars 1.7.0.alpha.1
• Fix for rails 3.2 [#131]
• Fix for BatchInserter bug, [#139]
• Added rake task for upgrading [#116]
• Added scripts for upgrading database [#116]

[2.0.0.alpha.4 / 2012-01-17]

• Fix node and rel enumerable for JRuby 1.9, Dmytrii Nagirniak
• Remove the will_paginate and move it to a separate gem Dmytrii Nagirniak, [#129][#132]
• Use type converter to determine how to handle multi-param attributes, Dmyitrii Nagirniak [#97]
• Set default storage_path in Rails to db [#96]
• Fix numeric Converter with nils and Float converter, Dmytrii Nagirniak
• Fix Neo4j::Rails::Model.find incorrect behavior with negative numbers, Dmytrii Nagirniak [#101]
• Allow to use symbols in batch inserter [#104]
• Split neo4j-jars gem into three jars, community,advanced&enterprise

== 2.0.0.alpha.1 / 2012-01-11

• Split JARS into a separate gem (neo4j-jars) [#115]
• Changed prefix of relationships so that it allows having incoming relationships from different classes with different relationship names. Migration is needed to update an already existing database - see issue #116. [#117]
• Fix for undefined method 'add_unpersited_outgoing_rel' [#111]
• Fix for Rails models named Property [#108] (Vivek Prahlad)

== 1.3.1 / 2011-12-14

• Make all relationships visible in Rails callback (rspecs #87, Dmytrii Nagirniak) [#211]
• Enable travis to build JRuby 1.9 (pull #87, Dmytrii Nagirniak) [#214]
• Support for composite lucene queries with OR and NOT (pull #89, Deepak N)
• Enforce the correct converter on a property type when the type is given (pull #86, Dmytrii Nagirniak)
• Development: make it easier to run RSpecs and guard (pull #85, Dmytrii Nagirniak)
• Added ability to disable observer (pull #84, Dmytrii Nagirniak)
• Fixing multiple assignment of has_one assocaition (pull #83 Deepak N)
• Accept association_id for has_one assocations (pull #82, Deepak N)
• Upgrade to 1.6.M01 Neo4j java jars [#209]
• Defer warning message 'Unknown outgoing relationship' (pull #81, Vivek Prahlad)
• Added string converter, e.g. property :name, :type => String (pull #80, Dmytrii Nagirniak)
• Added symbol converter e.g. property :status, :type => Symbol (pull #79, Dmytrii Nagirniak) [#205]

== 1.3.0 / 2011-12-06

• Added neo4j-upgrade script to rename lucene index files and upgrade to 1.5 [#197]
• Expose Neo4j::NodeMixin#index_types returning available indices (useful for Cypher queries) [#194]
• The to_other method is now available also in the Neo4j::Rails API [#193]
• Expose rel_type method for Neo4j::Rails::Relationship [#196]
• Support for breadth and depth first traversals [#198]
• Support for cypher query [#197]
• Fix for rule node concurrency issue (pull #78, Vivek Prahlad)
• Bugfix for the uniqueness validation for properties with quotes (pull #76, Vivek Prahlad)
• More performance tweaks (pull #75, #77, Vivek Prahlad)
• Fixing add_index for properties other than type string (pull #74, Deepak N)
• Significant performance boost for creating large numbers of models in a transaction (pull #73, Vivek Prahlad)
• Upgrade to neo4j 1.5 jars (pull #72, Vivek Prahlad)
• Fix for assigning nil values to incoming has_one relation (pull #70, Deepak N)
• Support for revert and fixes for Neo4j::Rails::Versioning (pull #71, Vivek Prahlad)

== 1.2.6 / 2011-11-02

• Generators can now generate relationships as well [#195]
• Better will_paginate support for Neo4j::Rails::Model [#194]
• Fixing updated_at to be set only if model has changed (pull #68, Deepak N)
• Bringing back changes removed during identiy map to fix bug [#190] (Deepak N)
• Fixing updated_at to be set only if model has changed, using callbacks instead of overriding method for stamping time (Deepak N)
• Added versioning support (pull #67) (Vivek Prahlad)

== 1.2.5 / 2011-10-21

• Faster traversals by avoiding loading Ruby wrappers (new method 'raw' on traversals) [#189]
• Support for IdentityMap [#188]
• Improved performance in event handler (Vivek Prahlad)
• Fixing issue with validates_presence_of validation (Vivek Prahlad)
• Implemented compositions support on Neo4j::Rails::Relationship (Kalyan Akella)
• Added after_initialize callback (Deepak N)
• Fixed performance issues on node deleted (Vivek Prahlad)
• Fixed a performance issue in the index_registry (Vivek Prahlad)
• Fixed uniqueness validation for :case_sensitive => false (Vivek Prahlad)
• Fixed update_attributes deleting relations when model is invalid (Deepak N)
• Fixed timestamp rails generator (Marcio Toshio)

== 1.2.4 / 2011-10-07

• Support for traversing with Neo4j::Node#eval_paths and setting uniqueness on traversals [#187]
• Removed unnecessary node creation on database start up (class nodes attached to reference node) (Vivek Prahlad)
• Safer multitenancy - automatically reset the reference node in thread local context after each request using rack middleware
• Bugfixes for multitenancy (Deepak N and Vivek Prahlad)

== 1.2.3 / 2011-10-01

• Multitenancy support by namespaced-indices & changeable reference node (Vivek Prahlad, pull 41)
• Added a Neo4j::Rails::Model#columns which returns all defined properties [#186]
• Fixed validation associated entities, parent model should be invalid if its nested model(s) is invalid (Vivek Prahlad)
• Fixed property validation to read value before conversion as per active model conventions (Deepak N)
• Fixed property_before_type_cast for loaded models (Deepak N)
• Better support for nested models via ActionView field_for [#185]
• BUG: fix for null pointer issue after delete_all on Neo4j::Rails::Model#has_n relationships (Vivek Prahlad)
• BUG: init_on_create was not called when creating a new relationship via the << operator [#183]

== 1.2.2 / 2011-09-15

• Added compositions support for rails mode (Deepak N)
• Added support for nested transactions at the Rails model level (Vivek Prahlad)
• Fixing issue where save for invalid entities puts them into an inconsistent state (Vivek Prahlad)
• Fix for issue with save when validation fails (Vivek Prahlad)
• Fix for accepts_nested_attributes_for when the associated entities are created before a new node (Vivek Prahlad)
• Fix to allow has_one relationships to handle nil assignments in models (Vivek Prahlad)
• Observers support for neo4j rails model using active model (Deepak N)
• Override ActiveModel i18n_scope for neo4j (Deepak N)
• Added finders similar to active record and mongoid (Deepak N)
• Added find!, find_or_create_by and find_or_initialize_by methods, similar to active record finders (Deepak N)

== 1.2.1 / 2011-08-29

• Fixed failing RSpecs for devise-neo4j gem - column_names method on neo4j orm adapter throws NoMethodError (thanks Deepak N)

== 1.2.0 / 2011-08-16

• Upgrade to java library neo4j 1.4.1, see http://neo4j.rubyforge.org/guides/configuration.html

== 1.1.4 / 2011-08-10

• Fixed dependency to will_paginate, locked to 3.0.pre4 (newly released 3.0.0 does not work yet with neo4j.rb)

  == 1.1.3 / 2011-08-09

• real recursive rule to the top class, subclasses with rules did not work (Frédéric Vanclef)

• BUG: not able to create array properties on relationships (Pere Urbon)

• BUG: lucene did not work if starting up neo4j in read only mode (like rails console when the rails is already running)

== 1.1.2 / 2011-06-08

• Added configuration option 'enable_rules' to disable the _all relationships and custom rules [#176]
• Added a #node method on the Neo4j::Node and Neo4j::NodeMixin. Works like the #rel method but returns the node instead. [#174]
• Simplify creating relationship between two existing nodes [#175]

== 1.1.1 / 2011-05-26

• Made neo4j compatible with rails 3.1.0.rc1 [#170]
• Fix for neo4j-devise [#171]
• BUG: Neo4j::GraphAlgo shortest path does raise exception if two nodes are not connected [#172]

== 1.1.0 / 2011-05-13

• Support for embedding neo4j.rb by providing an already running db instance (#168)
• Neo4j::Rails::Relationships should be ActiveModel compliant (#156)
• Support for incoming relationships in Neo4j::Rails::Model (#157)
• to_json method for models no tags √ resolved (#154)
• Implement hash so that it will work with Sets (#160)
• Modified the traverser to allow iterating over paths not just over end_nodes (#161)
• Create method should take a block to initialize itself (#162)
• Upgrade to 1.3 neo4j java library (#164)
• Default `nodes' invocation for Algo path finders (#165)
• Property and index class methods modified to take arbitrary number of symbols optionally followed by options hash (#166)
• BUG: Setting property :system on Neo4j::Rails::Model should work (#163)
• BUG: update_attributes should convert values according to Type (#155)
• BUG: Neo4j::RelationshipMixin#relationship_type broken #(169)
• BUG: Relationship.load(nil) == Relationship.load(0) (#167)
• BUG: Full text search returns nil in rails model (#153)

[1.0.0 / 2011-03-02]

• Complete rewrite of everything.
• Replaced the lucene module with using the java neo4j-lucene integration instead
• Lots of improvements of the API
• Better ActiveModel/Rails integration

[0.4.4 / 2010-08-01]

• Fixed bug on traversing when using the RelationshipMixin (#121)
• BatchInserter and JRuby 1.6 - Fix iteration error with trying to modify in-place hash

[0.4.3 / 2010-04-10]

• Fixed .gitignore - make sure that we do not include unnecessarily files like neo4j databases. Release 0.4.2 contained test data.
• Added synchronize around Index.new so that two thread can't modify the same index at the same time.

[0.4.2 / 2010-04-08]

• No index on properties for the initialize method bug (#116)
• Tidy up Thread Synchronization in Lucene wrapper - lucene indexing performance improvement (#117)
• Permission bug loading neo4j jar file (#118)
• Spike: Make NodeMixin ActiveModel complient - experimental (#115)

[0.4.1 / 2010-03-11]

• Migrations (#108)
• BatchInserter (#111)
• Neo4j::Relationship.new should take a hash of properties (#110)
• Upgrade to neo4j-1.0 (#114)
• Bigfix: has_one should replace old relationship (#106)
• Bugfix: custom accessors for NodeMixin#update (#113)
• Bugfix: Indexed properties problem on extented ruby classes critical "properties indexer" (#112)

[0.4.0 / 2010-02-06]

• Performance improvements and Refactoring: Use and Extend Neo4j Java Classes (#97)
• Support for Index and Declaration of Properties on Relationships (#91)
• Upgrade to neo4j-1.0 rc (#100)
• All internal properties should be prefix with a '_',0.4.0 (#105)
• Generate relationship accessor methods for declared has_n and has_one relationships (#104)
• New way of creating relationship - Neo4j::Relationship.new (#103)
• Neo4j#init_node method should take one or more args (#98)
• Namespaced relationships: has_one...from using the wrong has_n...to(#92)
• Neo4j::NodeMixin and Neo4j::Node should allow a hash for initialization (#99)

[0.3.3 / 2009-11-25]

• Support for a counter property on has_lists (#75)
• Support for Cascade delete. On has_n, had_one and has_list (#81)
• NodeMixin#all should work with inheritance - Child classes should have a relationship of their own. (#64)
• Support for other lucene analyzer then StandardAnalyzer (#87)
• NodeMixin initialize should accept block like docs (#82)
• Add incoming relationship should work as expected: n1.relationships.incoming(:foo) << n2 (#80)
• Delete node from a has_list relationship should work as expected (#79)
• Improve stacktraces (#94)
• Removed sideeffect of rspecs (#90)
• Add debug method on NodeMixin to print it self (#88)
• Removed to_a method (#73)
• Upgrade to neo4j-1.0b10 (#95)
• Upgrade to lucene 2.9.0 (#83)
• Refactoring: RSpecs (#74)
• Refactoring: aggregate each, renamed to property aggregator (#72)
• BugFix: neo4j gem cannot be built from the source (#86)
• BugFix: Neo4j::relationship should not raise Exception if there are no relationships (#78)

[0.3.2 / 2009-09-17]

• Added support for aggregating nodes (#65)
• Wrapped Neo4j GraphAlgo AllSimplePath (#70)
• Added traversal with traversal position (#71)
• Removed DynamicAccessors mixin, replaced by [] operator (#67)
• Impl Neo4j.all_nodes (#69)
• Upgrated Neo4j jar file to 1.0-b9
• The Neo4j#relationship method now allows a filter parameter (#66)
• Neo4j.rb now can read database not created by Neo4j.rb - does not require classname property (#63)
• REST - added an "all" value for the depth traversal query parameter (#62)
• REST - Performance improvments using the Rest Mixin (#60)

[0.3.1 / 2009-07-25]

• Feature, extension - find path between given pair of nodes (#58)
• Fix a messy exception on GET /nodes/UnknownClassName (#57)
• Bug - exception on GET /nodes/classname/rel if rel is a has_one relationship (#56)
• Bug: GET /nodes/classname missing out nodes with no properties (#55)
• Bug: Lucene sorting caused exception if there were no documents (#54)
• Bug: reindexer fails to connect nodes to the IndexNode (#53)

[0.3.0 / 2009-06-25]

• Neo4j should track node changes
• RESTful support for lucene queries, sorting and paging
• RESTful support for Relationships
• RESTful support for Node and properties
• Experimental support for Master-Slave Replication via REST
• RESTful Node representation should contain hyperlinks to relationships
• Added some handy method like first and empty? on relationships
• Use new neo4j: neo-1.0-b8
• Add an event handler for create/delete nodes start/stop neo, update property/relationship
• The NodeMixin should behave like a hash, added [] and []= methods
• Support list topology - has_list and belongs_to_list Neo4j::NodeMixin Classmethods
• Should be possible to add relationships without declaring them (Neo4j#relationships.outgoing(:friends) << node)
• Neo4j extensions file structure, should be easy to create your own extensions
• Rename relation to relationship (Neo4j::Relations => Neo4j::Relationships, DynamicRelation => Relationship) [data incompatible change]
• Auto Transaction is now optional
• Setting Float properties fails under JRuby1.2.0
• Bug: Indexing relationships does not work
• Make the ReferenceNode include Neo4j::NodeMixin
• Added handy Neo4j class that simply includes the Neo4j::NodeMixin
• Neo4j::IndexNode now holds references to all nodes (Neo4j.ref_node -> Neo4j::IndexNode -> ...)

[0.2.1 / 2009-03-15]

• Refactoring of lucene indexing of the node space (28)
• Fixed bug on Neo4j::Nodemixin#property? (#22)

[0.2.0 / 2009-01-20]

• Impl. Neo4j::Node#traverse - enables traversal and filtering using TraversalPosition info (#17,#19)
• Impl. traversal to any depth (#15)
• Impl. traversal several relationships type at the same time (#16)
• Fixed a Lucene timezone bug (#20)
• Lots of refactoring of the neo4j.rb traversal code and RSpecs

[0.1.0 / 2008-12-18]

• Property can now be of any type (and not only String, Fixnum, Float)
• Indexing and Query with Date and DateTime
• YARD documentation
• Properties can be removed
• A property can be set to nil (it will then be removed).

[0.0.7 / 2008-12-10]

• Added method to_param and methods on the value object needed for Ruby on Rails
• Impl. update from a value object/hash for a node
• Impl. generation of value object classes/instances from a node.
• Refactoring the Transaction handling (reuse PlaceboTransaction instances if possible)
• Removed the need to start and stop neo. It will be done automatically when needed.

[0.0.6 / 2008-12-03]

• Removed the configuration from the Neo4j.start method. Now exist in Neo4j::Config and Lucene::Config.
• Implemented sort_by method.
• Lazy loading of search result. Execute the query and load the nodes only if needed.
• Added support to use lucene query language, example: Person.find("name:foo AND age:42")
• All test now uses RAM based lucene indexes.

[0.0.5 / 2008-11-17]

• Supports keeping lucene index in memory instead of on disk
• Added support for lucene full text search
• Fixed so neo4j runs on JRuby 1.1.5
• Implemented support for reindex all instances of a node class. This is needed if the lucene index is kept in memory or if the index is changed.
• Added ReferenceNode. All nodes now have a relationship from this reference node.
• Lots of refactoring
• Added the IMDB example. It shows how to create a neo database, lucene queries and node traversals.

[0.0.4 / 2008-10-23]

• First release to rubyforge