Class: ActiveRecord::Associations::HasManyAssociation

Inherits:
CollectionAssociation show all
Includes:
ForeignAssociation
Defined in:
lib/active_record/associations/has_many_association.rb

Overview

Active Record Has Many Association

This is the proxy that handles a has many association.

If the association has a :through option further specialization is provided by its child HasManyThroughAssociation.

Direct Known Subclasses

HasManyThroughAssociation

Instance Attribute Summary

Attributes inherited from Association

#disable_joins, #owner, #reflection, #target

Instance Method Summary collapse

Methods included from ForeignAssociation

#foreign_key_present?, #nullified_owner_attributes

Methods inherited from CollectionAssociation

#add_to_target, #build, #concat, #delete, #delete_all, #destroy, #destroy_all, #empty?, #find, #find_from_target?, #ids_reader, #ids_writer, #include?, #load_target, #null_scope?, #reader, #replace, #reset, #scope, #size, #target=, #writer

Methods inherited from Association

#create, #create!, #extensions, #initialize, #initialize_attributes, #inversed_from, #inversed_from_queries, #klass, #load_target, #loaded!, #loaded?, #marshal_dump, #marshal_load, #reload, #remove_inverse_instance, #reset, #reset_negative_cache, #reset_scope, #scope, #set_inverse_instance, #set_inverse_instance_from_queries, #stale_target?

Constructor Details

This class inherits a constructor from ActiveRecord::Associations::Association

Instance Method Details

#handle_dependency ⇒ Object

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# File 'lib/active_record/associations/has_many_association.rb', line 13

def handle_dependency
  case options[:dependent]
  when :restrict_with_exception
    raise ActiveRecord::DeleteRestrictionError.new(reflection.name) unless empty?

  when :restrict_with_error
    unless empty?
      record = owner.class.human_attribute_name(reflection.name).downcase
      owner.errors.add(:base, :'restrict_dependent_destroy.has_many', record: record)
      throw(:abort)
    end

  when :destroy
    # No point in executing the counter update since we're going to destroy the parent anyway
    load_target.each { |t| t.destroyed_by_association = reflection }
    destroy_all
  when :destroy_async
    load_target.each do |t|
      t.destroyed_by_association = reflection
    end

    unless target.empty?
      association_class = target.first.class
      primary_key_column = association_class.primary_key.to_sym

      ids = target.collect do |assoc|
        assoc.public_send(primary_key_column)
      end

      enqueue_destroy_association(
        owner_model_name: owner.class.to_s,
        owner_id: owner.id,
        association_class: reflection.klass.to_s,
        association_ids: ids,
        association_primary_key_column: primary_key_column,
        ensuring_owner_was_method: options.fetch(:ensuring_owner_was, nil)
      )
    end
  else
    delete_all
  end
end

#insert_record(record, validate = true, raise = false) ⇒ Object

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# File 'lib/active_record/associations/has_many_association.rb', line 56

def insert_record(record, validate = true, raise = false)
  set_owner_attributes(record)
  super
end