Added required_fields to recoverable

lib/devise/models/recoverable.rb

@@ -24,6 +24,10 @@ module Models
     module Recoverable
       extend ActiveSupport::Concern
 
+      def self.required_fields(klass)
+        [:reset_password_sent_at, :reset_password_token]
+      end
+
       # Update password saving the record and clearing token. Returns true if
       # the passwords are valid and the record was saved, false otherwise.
       def reset_password!(new_password, new_password_confirmation)

test/models/recoverable_test.rb

@@ -195,4 +195,11 @@ def setup
       assert_equal "has expired, please request a new one", reset_password_user.errors[:reset_password_token].join
     end
   end
-end
+
+  test 'required_fields should contain the fields that Devise uses' do
+    assert_equal Devise::Models::Recoverable.required_fields(User), [
+      :reset_password_sent_at,
+      :reset_password_token
+    ]
+  end
+end