Defined In

lib/active_model/observing.rb
lib/active_model/test_case.rb
lib/active_model/validations/length.rb
lib/active_model/validations/format.rb
lib/active_model/validations/confirmation.rb
lib/active_model/validations/callbacks.rb
lib/active_model/validations/inclusion.rb
lib/active_model/validations/exclusion.rb
lib/active_model/validations/with.rb
lib/active_model/validations/numericality.rb
lib/active_model/validations/presence.rb
lib/active_model/validations/validates.rb
lib/active_model/validations/acceptance.rb
lib/active_model/serialization.rb
lib/active_model/callbacks.rb
lib/active_model/translation.rb
lib/active_model/version.rb
lib/active_model/validator.rb
lib/active_model/mass_assignment_security.rb
lib/active_model/serializers/xml.rb
lib/active_model/serializers/json.rb
lib/active_model/naming.rb
lib/active_model/attribute_methods.rb
lib/active_model/deprecated_error_methods.rb
lib/active_model/errors.rb
lib/active_model/dirty.rb
lib/active_model/lint.rb
lib/active_model/conversion.rb
lib/active_model/validations.rb
lib/active_model/mass_assignment_security/sanitizer.rb
lib/active_model/mass_assignment_security/permission_set.rb
lib/active_model.rb

module ActiveModel