Class: ActiveRecord::Associations::HasManyThroughAssociation
- Inherits:
-
HasManyAssociation
- Object
- Association
- CollectionAssociation
- HasManyAssociation
- ActiveRecord::Associations::HasManyThroughAssociation
- Includes:
- ThroughAssociation
- Defined in:
- lib/active_record/associations/has_many_through_association.rb
Overview
:nodoc:
Instance Attribute Summary
Attributes inherited from Association
#inversed, #owner, #reflection, #target
Instance Method Summary collapse
- #concat(*records) ⇒ Object
- #concat_records(records) ⇒ Object
-
#initialize(owner, reflection) ⇒ HasManyThroughAssociation
constructor
A new instance of HasManyThroughAssociation.
- #insert_record(record, validate = true, raise = false) ⇒ Object
-
#size ⇒ Object
Returns the size of the collection by executing a SELECT COUNT(*) query if the collection hasn’t been loaded, and by calling collection.size if it has.
Methods inherited from HasManyAssociation
Methods included from ForeignAssociation
Methods inherited from CollectionAssociation
#add_to_target, #any?, #build, #count, #create, #create!, #delete, #delete_all, #destroy, #destroy_all, #distinct, #empty?, #fifth, #find, #first, #forty_two, #fourth, #ids_reader, #ids_writer, #include?, #last, #length, #load_target, #many?, #null_scope?, #reader, #replace, #replace_on_target, #reset, #scope, #second, #select, #take, #third, #transaction, #writer
Methods inherited from Association
#aliased_table_name, #association_scope, #initialize_attributes, #interpolate, #klass, #load_target, #loaded!, #loaded?, #marshal_dump, #marshal_load, #reload, #reset, #reset_scope, #scope, #set_inverse_instance, #stale_target?, #target_scope
Constructor Details
#initialize(owner, reflection) ⇒ HasManyThroughAssociation
Returns a new instance of HasManyThroughAssociation.
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# File 'lib/active_record/associations/has_many_through_association.rb', line 9 def initialize(owner, reflection) super @through_records = {} @through_association = nil end |
Instance Method Details
#concat(*records) ⇒ Object
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# File 'lib/active_record/associations/has_many_through_association.rb', line 31 def concat(*records) unless owner.new_record? records.flatten.each do |record| raise_on_type_mismatch!(record) end end super end |
#concat_records(records) ⇒ Object
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# File 'lib/active_record/associations/has_many_through_association.rb', line 41 def concat_records(records) ensure_not_nested records = super(records, true) if owner.new_record? && records records.flatten.each do |record| build_through_record(record) end end records end |
#insert_record(record, validate = true, raise = false) ⇒ Object
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# File 'lib/active_record/associations/has_many_through_association.rb', line 55 def insert_record(record, validate = true, raise = false) ensure_not_nested if record.new_record? if raise record.save!(:validate => validate) else return unless record.save(:validate => validate) end end save_through_record(record) if has_cached_counter? && !through_reflection_updates_counter_cache? ActiveSupport::Deprecation.warn(<<-MSG.squish) Automatic updating of counter caches on through associations has been deprecated, and will be removed in Rails 5. Instead, please set the appropriate `counter_cache` options on the `has_many` and `belongs_to` for your associations to #{through_reflection.name}. MSG update_counter_in_database(1) end record end |
#size ⇒ Object
Returns the size of the collection by executing a SELECT COUNT(*) query if the collection hasn’t been loaded, and by calling collection.size if it has. If the collection will likely have a size greater than zero, and if fetching the collection will be needed afterwards, one less SELECT query will be generated by using #length instead.
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# File 'lib/active_record/associations/has_many_through_association.rb', line 21 def size if has_cached_counter? owner._read_attribute cached_counter_attribute_name(reflection) elsif loaded? target.size else super end end |