method

changed

rails latest stable - Class: ActiveModel::Dirty

changed()

public

Returns an array with the name of the attributes with unsaved changes.

person.changed # => []
person.name = 'bob'
person.changed # => ["name"]

# File activemodel/lib/active_model/dirty.rb, line 288
    def changed
      mutations_from_database.changed_attribute_names
    end