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unreleased

Changed

  • Missing attribute error now includes the name of the class (issue #170 via #191) (@phillipoertel + @cllns)

Compare v1.6.0...master

1.6.0 2022-11-04

Changed

  • This version uses dry-core 1.0 (@flash-gordon + @solnic)

Compare v1.5.2...v1.6.0

1.5.2 2022-10-19

Fixed

  • Coercion failures keep the original error instead of just having a string (@flash-gordon + @newx)

Compare v1.5.1...v1.5.2

1.5.1 2022-10-17

Fixed

  • Fixed issues with auto-loading Extensions module (issue #183 fixed via #184) (@solnic)

Compare v1.5.0...v1.5.1

1.5.0 2022-10-15

Changed

  • Use zeitwerk for auto-loading (@flash-gordon)

Compare v1.4.0...v1.5.0

1.4.0 2021-01-21

Added

  • Support for wrapping constructors and fallbacks, see release notes for dry-types 1.5.0 (@flash-gordon)
  • Improvements of the attribute DSL, now it's possible to use optional structs as a base class (@flash-gordon) 
    class User < Dry::Struct
  attribute :name, Types::String
  attribute :address, Dry::Struct.optional do
    attribute :city, Types::String
  end
end

User.new(name: "John", address: nil) # => #<User name="John" address=nil>

Compare v1.3.0...v1.4.0

1.3.0 2020-02-10

Added

  • Nested structures will reuse type and key transformations from the enclosing struct (@flash-gordon)

    class User < Dry::Struct
  transform_keys(&:to_sym)

  attribute :name, Types::String
  attribute :address do
    # this struct will inherit transform_keys(&:to_sym)
    attribute :city, Types::String
  end

  # nested struct will _not_ transform keys because a parent
  # struct is given
  attribute :contacts, Dry::Struct do
    attribute :email, Types::String
  end
end

  • Dry::Struct::Constructor finally acts like a fully-featured type (@flash-gordon)

  • Dry::Struct.abstract declares a struct class as abstract. An abstract class is used as a default superclass for nested structs (@flash-gordon)

  • Dry::Struct.to_ast and struct compiler (@flash-gordon)

  • Struct composition with Dry::Struct.attributes_from. It's more flexible than inheritance (@waiting-for-dev + @flash-gordon)

    class Address < Dry::Struct
  attribute :city, Types::String
  attribute :zipcode, Types::String
end

class Buyer < Dry::Struct
  attribute :name, Types::String
  attributes_from Address
end

class Seller < Dry::Struct
  attribute :name, Types::String
  attribute :email, Types::String
  attributes_from Address
end

Changed

  • [internal] metadata is now stored inside schema (@flash-gordon)

Compare v1.2.0...v1.3.0

1.2.0 2019-12-20

Changed

  • Dry::Struct::Value is deprecated. Dry::Struct instances were never meant to be mutable, we have no support for this. The only difference between Dry::Struct and Dry::Struct::Value is that the latter is deeply frozen. Freezing objects slows the code down and gives you very little benefit in return. If you have a use case for Value, it won't be hard to roll your own solution using ice_nine (flash-gordon)
  • In the thread of the previous change, structs now use immutable equalizer. This means Struct#hash memoizes its value after the first invocation. Depending on the case, this may speed up your code significantly (flash-gordon)

Compare v1.1.1...v1.2.0

1.1.1 2019-10-13

Changed

  • Pattern matching syntax is simplified with deconstruct_keys (k-tsj)

    User = Dry.Struct(name: 'string', email: 'string')

user = User.new(name: 'John Doe', email: '[email protected]')

case user
in User(name: 'John Doe', email:)
  puts email
else
  puts 'Not John'
end

    See more examples in the specs.

Compare v1.1.0...v1.1.1

1.1.0 2019-10-07

Added

  • Experimental support for pattern matching 🎉 (flash-gordon)

Compare v1.0.0...v1.1.0

1.0.0 2019-04-23

Added

  • Struct.call now accepts an optional block that will be called on failed coercion. This behavior is consistent with dry-types 1.0. Note that .new doesn't take a block (flash-gordon) 
    User = Dry::Struct(name: 'string')
User.(1) { :oh_no }
# => :oh_no

Changed

  • valid? and === behave differently, === works the same way Class#=== does and valid? checks if the value can be coerced to the struct (flash-gordon)

Compare v0.7.0...v1.0.0

0.7.0 2019-03-22

Changed

  • [BREAKING] Struct.input was renamed Struct.schema, hence Struct.schema returns an instance of Dry::Types::Hash::Schema rather than a Hash. Schemas are also implementing Enumerable but they iterate over key types. New API: 
    User.schema.each do |key|
  puts "Key name: #{ key.name }"
  puts "Key type: #{ key.type }"
end
    To get a type by its name use .key: 
    User.schema.key(:id) # => #<Dry::Types::Hash::Key ...>
  • [BREAKING] transform_types now passes one argument to the block, an instance of the Key type. Combined with the new API from dry-types it simplifies declaring omittable keys: 
    class StructWithOptionalKeys < Dry::Struct
  transform_types { |key| key.required(false) }
  # or simply
  transform_types(&:omittable)
end
  • Dry::Stuct#new is now more efficient for partial updates (flash-gordon)
  • Ruby 2.3 is EOL and not officially supported. It may work but we don't test it.

Compare v0.6.0...v0.7.0

0.6.0 2018-10-24

Added

  • Struct.attribute? is an easy way to define omittable attributes (flash-gordon):

    class User < Dry::Struct
  attribute  :name,  Types::Strict::String
  attribute? :email, Types::Strict::String
end
# User.new(name: 'John') # => #<User name="John">

Fixed

  • Struct#to_h recursively converts hash values to hashes, this was done to be consistent with current behavior for arrays (oeoeaio + ZimbiX)

Changed

  • [BREAKING] Struct.attribute? in the old sense is deprecated, use has_attribute? as a replacement

Compare v0.5.1...v0.6.0

0.5.1 2018-08-11

Added

  • Pretty print extension (ojab) 
    Dry::Struct.load_extensions(:pretty_print)
PP.pp(user)
#<Test::User
 name="Jane",
 age=21,
 address=#<Test::Address city="NYC", zipcode="123">>

Fixed

  • Constant resolution is now restricted to the current module when structs are automatically defined using the block syntax. This shouldn't break any existing code (piktur)

Compare v0.5.0...v0.5.1

0.5.0 2018-05-03

Added

  • Dry::Struct.transform_types accepts a block which is yielded on every type to add. Since types are dry-types' objects that come with a robust DSL it's rather simple to restore the behavior of constructor_type. See #64 for details (flash-gordon)

    Example: evaluate defaults on nil values

    class User < Dry::Struct
  transform_types do |type|
    type.constructor { |value| value.nil? ? Undefined : value  }
  end
end

  • Data::Struct.transform_keys accepts a block/proc that transforms keys of input hashes. The most obvious usage is simbolization but arbitrary transformations are allowed (flash-gordon)

  • Dry.Struct builds a struct by a hash of attribute names and types (citizen428)

    User = Dry::Struct(name: 'strict.string') do
  attribute :email, 'strict.string'
end

  • Support for Struct.meta, note that .meta returns a new class (flash-gordon)

    class User < Dry::Struct
  attribute :name, Dry::Types['strict.string']
end

UserWithMeta = User.meta(foo: :bar)

User.new(name: 'Jade').class == UserWithMeta.new(name: 'Jade').class # => false

  • Struct.attribute yields a block with definition for nested structs. It defines a nested constant for the new struct and supports arrays (AMHOL + flash-gordon)

      class User < Dry::Struct
    attribute :name, Types::Strict::String
    attribute :address do
      attribute :country, Types::Strict::String
      attribute :city, Types::Strict::String
    end
    attribute :accounts, Types::Strict::Array do
      attribute :currency, Types::Strict::String
      attribute :balance, Types::Strict::Decimal
    end
  end

  # ^This automatically defines User::Address and User::Account

Fixed

  • Adding a new attribute invalidates attribute_names (flash-gordon)
  • Struct classes track subclasses and define attributes in them, now it doesn't matter whether you define attributes first and then subclass or vice versa. Note this can lead to memory leaks in Rails environment when struct classes are reloaded (flash-gordon)

Compare v0.4.0...v0.5.0

0.4.0 2017-11-04

Fixed

  • Struct#new doesn't call .to_hash recursively (flash-gordon)

Changed

  • Attribute readers don't override existing instance methods (solnic)
  • Struct#new uses raw attributes instead of method calls, this makes the behavior consistent with the change above (flash-gordon)
  • constructor_type now actively rejects :weak and :symbolized values (GustavoCaso)

Compare v0.3.1...v0.4.0

0.3.1 2017-06-30

Added

  • Struct.constructor that makes dry-struct more aligned with dry-types; now you can have a struct with a custom constructor that will be called before calling the new method (v-kolesnikov)
  • Struct.attribute? and Struct.attribute_names for introspecting struct attributes (flash-gordon)
  • Struct#__new__ is a safe-to-use-in-gems alias for Struct#new (flash-gordon)

Compare v0.3.0...v0.3.1

0.3.0 2017-05-05

Added

  • Dry::Struct#new method to return new instance with applied changeset (Kukunin)

Fixed

  • .[] and .call does not coerce subclass to superclass anymore (Kukunin)
  • Raise ArgumentError when attribute type is a string and no value provided is for new (GustavoCaso)

Changed

  • .new without arguments doesn't use nil as an input for non-default types anymore (flash-gordon)

Compare v0.2.1...v0.3.0

0.2.1 2017-02-27

Fixed

  • Fixed Dry::Struct::Value which appeared to be broken in the last release (flash-gordon)

Compare v0.2.0...v0.2.1

0.2.0 2016-02-26

Changed

  • Struct attributes can be overridden in a subclass (flash-gordon)

Compare v0.1.1...v0.2.0

0.1.1 2016-11-13

Fixed

  • Make Dry::Struct act as a constrained type. This fixes the behavior of sum types containing structs (flash-gordon)

Compare v0.1.0...v0.1.1

0.1.0 2016-09-21

Added

  • :strict_with_defaults constructor type (backus)

Changed

  • [BREAKING] :strict was renamed to :permissive as it ignores missing keys (backus)
  • [BREAKING] :strict now raises on unexpected keys (backus)
  • Structs no longer auto-register themselves in the types container as they implement Type interface and we don't have to wrap them in Type::Definition (flash-gordon)

Compare v0.0.1...v0.1.0

0.0.1 2016-07-17

Initial release of code imported from dry-types