From d72a07f1d1478db9daed847eadb35bfd840674f6 Mon Sep 17 00:00:00 2001 From: Roberto Vasquez Angel Date: Wed, 25 Jul 2012 17:07:05 +0200 Subject: Add `ActiveModel::Validations::AbsenceValidator`, a validator to check the absence of attributes. Add `ActiveModel::Errors#add_on_present` method. Adds error messages to present attributes. --- .../lib/active_model/validations/absence.rb | 31 ++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 activemodel/lib/active_model/validations/absence.rb (limited to 'activemodel/lib/active_model/validations') diff --git a/activemodel/lib/active_model/validations/absence.rb b/activemodel/lib/active_model/validations/absence.rb new file mode 100644 index 0000000000..6790554907 --- /dev/null +++ b/activemodel/lib/active_model/validations/absence.rb @@ -0,0 +1,31 @@ +module ActiveModel + module Validations + # == Active Model Absence Validator + class AbsenceValidator < EachValidator #:nodoc: + def validate(record) + record.errors.add_on_present(attributes, options) + end + end + + module HelperMethods + # Validates that the specified attributes are blank (as defined by + # Object#blank?). Happens by default on save. + # + # class Person < ActiveRecord::Base + # validates_absence_of :first_name + # end + # + # The first_name attribute must be in the object and it must be blank. + # + # Configuration options: + # * :message - A custom error message (default is: "must be blank"). + # + # There is also a list of default options supported by every validator: + # +:if+, +:unless+, +:on+ and +:strict+. + # See ActiveModel::Validation#validates for more information + def validates_absence_of(*attr_names) + validates_with AbsenceValidator, _merge_attributes(attr_names) + end + end + end +end -- cgit v1.2.3