instance method `saved_change_to_attribute?`

Ruby on Rails 6.1.7.10

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, **options)

Did this attribute change when we last saved?

This method is useful in after callbacks to determine if an attribute was changed 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").

Options

from When passed, this method will return false unless the original value is equal to the given option

to When passed, this method will return false unless the value was changed to the given value

Parameters

attr_name req
options keyrest

Source

# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 51
      def saved_change_to_attribute?(attr_name, **options)
        mutations_before_last_save.changed?(attr_name.to_s, **options)
      end

Defined in activerecord/lib/active_record/attribute_methods/dirty.rb line 51 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveRecord::AttributeMethods::Dirty

Signature

Options

Parameters