instance method
will_save_change_to_attribute?
Ruby on Rails 8.1.2
Since v5.2.8.1Signature
will_save_change_to_attribute?(attr_name, **options)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.
Parameters
-
attr_namereq -
optionskeyrest
Source
# File activerecord/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
Defined in activerecord/lib/active_record/attribute_methods/dirty.rb line 138
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Defined in ActiveRecord::AttributeMethods::Dirty