rails--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, which has different behaviour.

  Rafael Mendonça França

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

  Method's name is causing confusion with the reset_#{attribute} methods. While reset_name sets the value of the name attribute to previous value reset_changes only discards the changes.

  Rafael Mendonça França

• Added restore_attributes method to ActiveModel::Dirty API which restores the value of changed attributes to previous value.

  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.