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 



14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
 
# File 'lib/active_record/associations/has_many_association.rb', line 14

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
      if association_class.query_constraints_list
        primary_key_column = association_class.query_constraints_list
        ids = target.collect { |assoc| primary_key_column.map { |col| assoc.public_send(col) } }
      else
        primary_key_column = association_class.primary_key
        ids = target.collect { |assoc| assoc.public_send(primary_key_column) }
      end

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

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



61
62
63
64
 
# File 'lib/active_record/associations/has_many_association.rb', line 61

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