rails/activemodel/CHANGELOG.md

• Passwords with spaces only allowed in ActiveModel::SecurePassword.

  Presence validation can be used to restore old behavior.

  Yevhene Shemet

• Validate options passed to ActiveModel::Validations.validate.

  Preventing, in many cases, the simple mistake of using validate instead of validates.

  Sonny Michaud

• Deprecate reset_#{attribute} in favor of restore_#{attribute}.

  These methods may cause confusion with the reset_changes that behaves differently of them.

• Deprecate ActiveModel::Dirty#reset_changes in favor of #clear_changes_information.

  This method name is causing confusion with the reset_#{attribute} methods. While reset_name set the value of the name attribute for the previous value reset_changes only discard the changes and previous changes.

• Added restore_attributes method to ActiveModel::Dirty API to restore all the changed values to the previous data.

  Igor G.

• Allow proc and symbol as values for only_integer of NumericalityValidator

  Robin Mehner

• has_secure_password now verifies that the given password is less than 72 characters if validations are enabled.

  Fixes #14591.

  Akshay Vishnoi

• Remove deprecated Validator#setup without replacement.

  See #10716.

  Kuldeep Aggarwal

• Add plural and singular form for length validator's default messages.

  Abd ar-Rahman Hamid

• Introduce validate as an alias for valid?.

  This is more intuitive when you want to run validations but don't care about the return value.

  Henrik Nyh

Please check 4-1-stable for previous changes.