Method: ActiveRecord::AttributeMethods::Dirty#attribute_before_last_save

Defined in:

lib/active_record/attribute_methods/dirty.rb

#attribute_before_last_save(attr_name) ⇒ Object

Returns the original value of an attribute before the last save.

This method is useful in after callbacks to get the original value of an attribute before the save that triggered the callbacks to run. It can be invoked as name_before_last_save instead of attribute_before_last_save("name").

# File 'lib/active_record/attribute_methods/dirty.rb', line 108

def attribute_before_last_save(attr_name)
  mutations_before_last_save.original_value(attr_name.to_s)
end