instance method `saved_change_to_attribute`

Ruby on Rails 7.2.3

Since v5.2.8.1

Available in: 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:

saved_change_to_attribute(attr_name)

Returns the change to an attribute during the last save. If the attribute was changed, the result will be an array containing the original value and the saved value.

This method is useful in after callbacks, to see the change in an attribute during the save that triggered the callbacks to run. It can be invoked as saved_change_to_name instead of saved_change_to_attribute("name").

Parameters

attr_name req

Source

# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 98
      def saved_change_to_attribute(attr_name)
        mutations_before_last_save.change_to_attribute(attr_name.to_s)
      end

Defined in activerecord/lib/active_record/attribute_methods/dirty.rb line 98 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveRecord::AttributeMethods::Dirty

Signature

Parameters