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Class: ActiveRecord::Associations::Builder::Association

Do not use. This class is for internal use only.
Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
BelongsTo, CollectionAssociation, HasMany, HasOne, SingularAssociation
Inherits: Object
Defined in: activerecord/lib/active_record/associations/builder/association.rb

Constant Summary

Class Attribute Summary

Class Method Summary

Class Attribute Details

.extensions (rw)

[ GitHub ] 

  


# File 'activerecord/lib/active_record/associations/builder/association.rb', line 17



attr_accessor :extensions


  







Class Method Details



  

    .add_after_commit_jobs_callback(model, dependent)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/builder/association.rb', line 145



def self.add_after_commit_jobs_callback(model, dependent)
  if dependent == :destroy_async
    mixin = model.generated_association_methods

    unless mixin.method_defined?(:_after_commit_jobs)
      model.after_commit(-> do
        _after_commit_jobs.each do |job_class, job_arguments|
          job_class.perform_later(**job_arguments)
        end
      end)

      mixin.class_eval <<-CODE, __FILE__, __LINE__ + 1
        def _after_commit_jobs
          @_after_commit_jobs ||= []
        end
      CODE
    end
  end
end


  








  

    .add_destroy_callbacks(model, reflection)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/builder/association.rb', line 140



def self.add_destroy_callbacks(model, reflection)
  name = reflection.name
  model.before_destroy(->(o) { o.association(name).handle_dependency })
end


  








  

    .build(model, name, scope, options, &block)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/builder/association.rb', line 25



def self.build(model, name, scope, options, &block)
  if model.dangerous_attribute_method?(name)
    raise ArgumentError, "You tried to define an association named #{name} on the model #{model.name}, but " \
                         "this will conflict with a method #{name} already defined by Active Record. " \
                         "Please choose a different association name."
  end

  reflection = create_reflection(model, name, scope, options, &block)
  define_accessors(model, reflection)
  define_callbacks(model, reflection)
  define_validations(model, reflection)
  define_change_tracking_methods(model, reflection)
  reflection
end


  








  

    .build_scope(scope)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/builder/association.rb', line 53



def self.build_scope(scope)
  if scope && scope.arity == 0
    proc { instance_exec(&scope) }
  else
    scope
  end
end


  








  

    .check_dependent_options(dependent, model)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/builder/association.rb', line 130



def self.check_dependent_options(dependent, model)
  if dependent == :destroy_async && !model.destroy_association_async_job
    err_message = "A valid destroy_association_async_job is required to use `dependent: :destroy_async` on associations"
    raise ActiveRecord::ConfigurationError, err_message
  end
  unless valid_dependent_options.include?(dependent)
    raise ArgumentError, "The :dependent option must be one of #{valid_dependent_options}, but is :#{dependent}"
  end
end


  








  

    .create_reflection(model, name, scope, options, &block)  
  



  

    
  





  
Raises:


    
  
  • 
    (ArgumentError)
  
    • 





  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/builder/association.rb', line 40



def self.create_reflection(model, name, scope, options, &block)
  raise ArgumentError, "association names must be a Symbol" unless name.kind_of?(Symbol)

  validate_options(options)

  extension = define_extensions(model, name, &block)
  options[:extend] = [*options[:extend], extension] if extension

  scope = build_scope(scope)

  ActiveRecord::Reflection.create(macro, name, scope, options, model)
end


  








  

    .define_accessors(model, reflection)   (private)
  



  

    

Defines the setter and getter methods for the association class Post < ::ActiveRecord::Base



has_many :comments



end



Post.first.comments and Post.first.comments= methods are defined by this method…


  



  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/builder/association.rb', line 95



def self.define_accessors(model, reflection)
  mixin = model.generated_association_methods
  name = reflection.name
  define_readers(mixin, name)
  define_writers(mixin, name)
end


  








  

    .define_callbacks(model, reflection)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/builder/association.rb', line 77



def self.define_callbacks(model, reflection)
  if dependent = reflection.options[:dependent]
    check_dependent_options(dependent, model)
    add_destroy_callbacks(model, reflection)
    add_after_commit_jobs_callback(model, dependent)
  end

  Association.extensions.each do |extension|
    extension.build(model, reflection)
  end
end


  








  

    .define_change_tracking_methods(model, reflection)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/builder/association.rb', line 122



def self.define_change_tracking_methods(model, reflection)
  # noop
end


  








  

    .define_extensions(model, name)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/builder/association.rb', line 73



def self.define_extensions(model, name)
  # noop
end


  








  

    .define_readers(mixin, name)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/builder/association.rb', line 102



def self.define_readers(mixin, name)
  mixin.class_eval <<-CODE, __FILE__, __LINE__ + 1
    def #{name}
      association(:#{name}).reader
    end
  CODE
end


  








  

    .define_validations(model, reflection)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/builder/association.rb', line 118



def self.define_validations(model, reflection)
  # noop
end


  








  

    .define_writers(mixin, name)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/builder/association.rb', line 110



def self.define_writers(mixin, name)
  mixin.class_eval <<-CODE, __FILE__, __LINE__ + 1
    def #{name}=(value)
      association(:#{name}).writer(value)
    end
  CODE
end


  








  

    .macro   (private)
  



  

    
  





  
Raises:


    
  
  • 
    (NotImplementedError)
  
    • 





  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/builder/association.rb', line 61



def self.macro
  raise NotImplementedError
end


  








  

    .valid_dependent_options   (private)
  



  

    
  





  
Raises:


    
  
  • 
    (NotImplementedError)
  
    • 





  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/builder/association.rb', line 126



def self.valid_dependent_options
  raise NotImplementedError
end


  








  

    .valid_options(options)   (private)
  

  [ GitHub ]


  

  


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



def self.valid_options(options)
  VALID_OPTIONS + Association.extensions.flat_map(&:valid_options)
end


  








  

    .validate_options(options)   (private)
  

  [ GitHub ]


  

  


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



def self.validate_options(options)
  options.assert_valid_keys(valid_options(options))
end