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Module: ActiveRecord::Associations

Do not use. This module is for internal use only.
Relationships & Source Files
Namespace Children
Modules:
Builder, ClassMethods, ForeignAssociation, ThroughAssociation
Classes:
AliasTracker, Association, AssociationScope, BelongsToAssociation, BelongsToPolymorphicAssociation, CollectionAssociation, CollectionProxy, DisableJoinsAssociationScope, HasManyAssociation, HasManyThroughAssociation, HasOneAssociation, HasOneThroughAssociation, JoinDependency, NestedError, Preloader, SingularAssociation
Extension / Inclusion / Inheritance Descendants
Included In:
Base
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::ActiveSupport::Concern, ::ActiveSupport::Autoload
Defined in: activerecord/lib/active_record/associations.rb,
activerecord/lib/active_record/associations/alias_tracker.rb,
activerecord/lib/active_record/associations/association.rb,
activerecord/lib/active_record/associations/association_scope.rb,
activerecord/lib/active_record/associations/belongs_to_association.rb,
activerecord/lib/active_record/associations/belongs_to_polymorphic_association.rb,
activerecord/lib/active_record/associations/collection_association.rb,
activerecord/lib/active_record/associations/collection_proxy.rb,
activerecord/lib/active_record/associations/disable_joins_association_scope.rb,
activerecord/lib/active_record/associations/foreign_association.rb,
activerecord/lib/active_record/associations/has_many_association.rb,
activerecord/lib/active_record/associations/has_many_through_association.rb,
activerecord/lib/active_record/associations/has_one_association.rb,
activerecord/lib/active_record/associations/has_one_through_association.rb,
activerecord/lib/active_record/associations/join_dependency.rb,
activerecord/lib/active_record/associations/nested_error.rb,
activerecord/lib/active_record/associations/preloader.rb,
activerecord/lib/active_record/associations/singular_association.rb,
activerecord/lib/active_record/associations/through_association.rb,
activerecord/lib/active_record/associations/join_dependency/join_association.rb,
activerecord/lib/active_record/associations/join_dependency/join_base.rb,
activerecord/lib/active_record/associations/join_dependency/join_part.rb,
activerecord/lib/active_record/associations/preloader/association.rb,
activerecord/lib/active_record/associations/preloader/batch.rb,
activerecord/lib/active_record/associations/preloader/branch.rb,
activerecord/lib/active_record/associations/preloader/through_association.rb

Overview

See ClassMethods for documentation.

Class Method Summary

::ActiveSupport::Concern - Extended

class_methods

Define class methods from given block.
included

Evaluate given block in context of base class, so that you can write class macros here.
prepended

Evaluate given block in context of base class, so that you can write class macros here.
append_features, prepend_features

::ActiveSupport::Autoload - Extended

autoload, autoload_at, autoload_under, eager_autoload, eager_load!

Instance Method Summary

Class Method Details

.eager_load!

[ GitHub ] 

  


# File 'activerecord/lib/active_record/associations.rb', line 44



def self.eager_load!
  super
  Preloader.eager_load!
  JoinDependency.eager_load!
end


  







Instance Method Details



  

    #association(name)  
  



  

    

Returns the association instance for the given name, instantiating it if it doesn’t already exist


  



  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations.rb', line 51



def association(name) # :nodoc:
  association = association_instance_get(name)

  if association.nil?
    unless reflection = self.class._reflect_on_association(name)
      raise AssociationNotFoundError.new(self, name)
    end
    association = reflection.association_class.new(self, reflection)
    association_instance_set(name, association)
  end

  association
end


  








  

    #association_cached?(name)  ⇒ Boolean 
  



  

    
  





  


  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations.rb', line 65



def association_cached?(name) # :nodoc:
  @association_cache.key?(name)
end


  








  

    #association_instance_get(name)   (private)
  



  

    

Returns the specified association instance if it exists, nil otherwise.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations.rb', line 81



def association_instance_get(name)
  @association_cache[name]
end


  








  

    #association_instance_set(name, association)   (private)
  



  

    

Set the specified association instance.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations.rb', line 86



def association_instance_set(name, association)
  @association_cache[name] = association
end


  








  

    #init_internals   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations.rb', line 75



def init_internals
  super
  @association_cache = {}
end


  








  

    #initialize_dup  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations.rb', line 69



def initialize_dup(*) # :nodoc:
  @association_cache = {}
  super
end