Method: ActiveModel::Dirty#changes

Defined in:

activemodel/lib/active_model/dirty.rb

#changes ⇒ Object

Returns a hash of changed attributes indicating their original and new values like attr => [original value, new value].

person.changes # => {}
person.name = 'bob'
person.changes # => { "name" => ["bill", "bob"] }

# File 'activemodel/lib/active_model/dirty.rb', line 353

def changes
  mutations_from_database.changes
end