instance method `attribute_will_change!`

Ruby on Rails 4.1.16

Since v3.0.20 Private

Available in: v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

attribute_will_change!(attr)

Handle *_will_change! for method_missing.

Parameters

attr req

Source

# File activemodel/lib/active_model/dirty.rb, line 185
      def attribute_will_change!(attr)
        return if attribute_changed?(attr)

        begin
          value = __send__(attr)
          value = value.duplicable? ? value.clone : value
        rescue TypeError, NoMethodError
        end

        changed_attributes[attr] = value
      end

Defined in activemodel/lib/active_model/dirty.rb line 185 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveModel::Dirty

Signature

Parameters