Adapt to changes in Rails 5.2.

lib/ransack/adapters/active_record/context.rb

@@ -14,7 +14,9 @@ class Context < ::Ransack::Context
 
         def initialize(object, options = {})
           super
-          @arel_visitor = @engine.connection.visitor
+          if ::ActiveRecord::VERSION::STRING < Constants::RAILS_5_2
+            @arel_visitor = @engine.connection.visitor
+          end
         end
 
         def relation_for(object)
@@ -25,7 +27,7 @@ def type_for(attr)
           return nil unless attr && attr.valid?
           name         = attr.arel_attribute.name.to_s
           table        = attr.arel_attribute.relation.table_name
-          schema_cache = @engine.connection.schema_cache
+          schema_cache = ::ActiveRecord::Base.connection.schema_cache
           unless schema_cache.send(database_table_exists?, table)
             raise "No table named #{table} exists."
           end
@@ -135,7 +137,7 @@ def join_sources
         end
 
         def alias_tracker
-          @join_dependency.alias_tracker
+          @join_dependency.send(:alias_tracker)
         end
 
         def lock_association(association)
@@ -145,11 +147,11 @@ def lock_association(association)
         if ::ActiveRecord::VERSION::STRING >= Constants::RAILS_4_1
           def remove_association(association)
             return if @lock_associations.include?(association)
-            @join_dependency.join_root.children.delete_if { |stashed|
+            @join_dependency.instance_variable_get(:@join_root).children.delete_if { |stashed|
               stashed.eql?(association)
             }
             @object.joins_values.delete_if { |jd|
-              jd.join_root.children.map(&:object_id) == [association.object_id]
+              jd.instance_variable_get(:@join_root).children.map(&:object_id) == [association.object_id]
             }
           end
         else
@@ -280,12 +282,17 @@ def build_joins(relation)
                 relation.table.from(relation.table), string_joins
             end
 
-          join_dependency = JoinDependency.new(
-            relation.klass, association_joins, join_list
-          )
-
-          join_nodes.each do |join|
-            join_dependency.alias_tracker.aliases[join.left.name.downcase] = 1
+          if ::ActiveRecord::VERSION::STRING < Constants::RAILS_5_2
+            join_dependency = JoinDependency.new(relation.klass, association_joins, join_list)
+            join_nodes.each do |join|
+              join_dependency.send(:alias_tracker).aliases[join.left.name.downcase] = 1
+            end
+          else
+            alias_tracker = ::ActiveRecord::Associations::AliasTracker.create(::ActiveRecord::Base.connection, relation.table.name, join_list)
+            join_dependency = JoinDependency.new(relation.klass, relation.table, association_joins, alias_tracker)
+            join_nodes.each do |join|
+              join_dependency.alias_tracker.aliases[join.left.name.downcase] = 1
+            end
           end
 
           if ::ActiveRecord::VERSION::STRING >= Constants::RAILS_4_1
@@ -308,29 +315,42 @@ def build_or_find_association(name, parent = @base, klass = nil)
         if ::ActiveRecord::VERSION::STRING >= Constants::RAILS_4_1
 
           def find_association(name, parent = @base, klass = nil)
-            @join_dependency.join_root.children.detect do |assoc|
+            @join_dependency.instance_variable_get(:@join_root).children.detect do |assoc|
               assoc.reflection.name == name &&
               (@associations_pot.empty? || @associations_pot[assoc] == parent) &&
               (!klass || assoc.reflection.klass == klass)
             end
           end
 
           def build_association(name, parent = @base, klass = nil)
-            jd = JoinDependency.new(
-              parent.base_klass,
-              Polyamorous::Join.new(name, @join_type, klass),
-              []
-            )
-            found_association = jd.join_root.children.last
+            if ::ActiveRecord::VERSION::STRING < Constants::RAILS_5_2
+              jd = JoinDependency.new(
+                parent.base_klass,
+                Polyamorous::Join.new(name, @join_type, klass),
+                []
+              )
+              found_association = jd.join_root.children.last
+            else
+              alias_tracker = ::ActiveRecord::Associations::AliasTracker.create(::ActiveRecord::Base.connection, parent.table.name, [])
+              jd = JoinDependency.new(
+                parent.base_klass,
+                parent.base_klass.arel_table,
+                Polyamorous::Join.new(name, @join_type, klass),
+                alias_tracker
+              )
+              found_association = jd.instance_variable_get(:@join_root).children.last
+            end
+
+
             @associations_pot[found_association] = parent
 
             # TODO maybe we dont need to push associations here, we could loop
             # through the @associations_pot instead
-            @join_dependency.join_root.children.push found_association
+            @join_dependency.instance_variable_get(:@join_root).children.push found_association
 
             # Builds the arel nodes properly for this association
             @join_dependency.send(
-              :construct_tables!, jd.join_root, found_association
+              :construct_tables!, jd.instance_variable_get(:@join_root), found_association
               )
 
             # Leverage the stashed association functionality in AR
@@ -340,7 +360,7 @@ def build_association(name, parent = @base, klass = nil)
           end
 
           def extract_joins(association)
-            parent = @join_dependency.join_root
+            parent = @join_dependency.instance_variable_get(:@join_root)
             reflection = association.reflection
             join_constraints = if ::ActiveRecord::VERSION::STRING < Constants::RAILS_5_1
                                  association.join_constraints(

lib/ransack/adapters/active_record/ransack/context.rb

@@ -30,7 +30,9 @@ def initialize(object, options = {})
       @associations_pot = {}
       @lock_associations = []
 
-      if ::ActiveRecord::VERSION::STRING >= Constants::RAILS_4_1
+      if ::ActiveRecord::VERSION::STRING >= Constants::RAILS_5_2
+        @base = @join_dependency.instance_variable_get(:@join_root)
+      elsif ::ActiveRecord::VERSION::STRING >= Constants::RAILS_4_1
         @base = @join_dependency.join_root
         @engine = @base.base_klass.arel_engine
       else

lib/ransack/constants.rb

@@ -47,6 +47,7 @@ module Constants
 
     RAILS_4_1           = '4.1'.freeze
     RAILS_5_1           = '5.1'.freeze
+    RAILS_5_2           = '5.2'.freeze
 
     RANSACK_SLASH_SEARCHES = 'ransack/searches'.freeze
     RANSACK_SLASH_SEARCHES_SLASH_SEARCH = 'ransack/searches/search'.freeze

lib/ransack/helpers/form_builder.rb

@@ -6,9 +6,15 @@ module ActionView::Helpers::Tags
   # https://github.com/rails/rails/commit/c1a118a
   class Base
     private
-    def value(object)
-      object.send @method_name if object # use send instead of public_send
-    end
+    if ::ActiveRecord::VERSION::STRING < '5.2'
+      def value(object)
+        object.send @method_name if object # use send instead of public_send
+      end
+    else # rails/rails#29791
+      def value
+        @object.send @method_name if @object
+      end
+    end      
   end
 end