instance method `add_autosave_association_callbacks`

Ruby on Rails 4.2.9

Since v2.3.18 Last seen in v4.2.9 Private

Available in: v2.3.18 v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9

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add_autosave_association_callbacks(reflection)

Adds validation and save callbacks for the association as specified by the reflection.

For performance reasons, we don’t check whether to validate at runtime. However the validation and callback methods are lazy and those methods get created when they are invoked for the very first time. However, this can change, for instance, when using nested attributes, which is called after the association has been defined. Since we don’t want the callbacks to get defined multiple times, there are guards that check if the save or validation methods have already been defined before actually defining them.

Parameters

reflection req

Source

# File activerecord/lib/active_record/autosave_association.rb, line 178
        def add_autosave_association_callbacks(reflection)
          save_method = :"autosave_associated_records_for_#{reflection.name}"

          if reflection.collection?
            before_save :before_save_collection_association

            define_non_cyclic_method(save_method) { save_collection_association(reflection) }
            # Doesn't use after_save as that would save associations added in after_create/after_update twice
            after_create save_method
            after_update save_method
          elsif reflection.has_one?
            define_method(save_method) { save_has_one_association(reflection) } unless method_defined?(save_method)
            # Configures two callbacks instead of a single after_save so that
            # the model may rely on their execution order relative to its
            # own callbacks.
            #
            # For example, given that after_creates run before after_saves, if
            # we configured instead an after_save there would be no way to fire
            # a custom after_create callback after the child association gets
            # created.
            after_create save_method
            after_update save_method
          else
            define_non_cyclic_method(save_method) { save_belongs_to_association(reflection) }
            before_save save_method
          end

          define_autosave_validation_callbacks(reflection)
        end

Defined in activerecord/lib/active_record/autosave_association.rb line 178 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveRecord::AutosaveAssociation::ClassMethods

Signature

Parameters