Method: ActiveRecord::AttributeMethods::Dirty#will_save_change_to_attribute?

Defined in:
lib/active_record/attribute_methods/dirty.rb

#will_save_change_to_attribute?(attr_name, **options) ⇒ Boolean

Will this attribute change the next time we save?

This method is useful in validations and before callbacks to determine if the next call to save will change a particular attribute. It can be invoked as will_save_change_to_name? instead of will_save_change_to_attribute?("name").

Options

from

When specified, this method will return false unless the original value is equal to the given value.

to

When specified, this method will return false unless the value will be changed to the given value.

Returns:

  • (Boolean) 


138
139
140
 
# File 'lib/active_record/attribute_methods/dirty.rb', line 138

def will_save_change_to_attribute?(attr_name, **options)
  mutations_from_database.changed?(attr_name.to_s, **options)
end