Contents

module ActiveModel
  module Validations
    # == Active Model Absence Validator
    class AbsenceValidator < EachValidator #:nodoc:
      def validate_each(record, attr_name, value)
        record.errors.add(attr_name, :present, options) if value.present?
      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:
      # * <tt>:message</tt> - 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 <tt>ActiveModel::Validation#validates</tt> for more information
      def validates_absence_of(*attr_names)
        validates_with AbsenceValidator, _merge_attributes(attr_names)
      end
    end
  end
end

Version data entries

32 entries across 32 versions & 2 rubygems

Version	Path
activemodel-4.0.13	lib/active_model/validations/absence.rb
activemodel-4.0.13.rc1	lib/active_model/validations/absence.rb
activemodel-4.0.11.1	lib/active_model/validations/absence.rb
activemodel-4.0.12	lib/active_model/validations/absence.rb
activemodel-4.0.11	lib/active_model/validations/absence.rb
activemodel-4.0.10	lib/active_model/validations/absence.rb
activemodel-4.0.10.rc2	lib/active_model/validations/absence.rb
activemodel-4.0.10.rc1	lib/active_model/validations/absence.rb
activemodel-4.0.9	lib/active_model/validations/absence.rb
activemodel-4.0.8	lib/active_model/validations/absence.rb
activemodel-4.0.7	lib/active_model/validations/absence.rb
activemodel-4.0.6	lib/active_model/validations/absence.rb
activemodel-4.0.6.rc3	lib/active_model/validations/absence.rb
activemodel-4.0.6.rc2	lib/active_model/validations/absence.rb
activemodel-4.0.6.rc1	lib/active_model/validations/absence.rb
activemodel-4.0.5	lib/active_model/validations/absence.rb
activemodel-4.0.4	lib/active_model/validations/absence.rb
activemodel-4.0.4.rc1	lib/active_model/validations/absence.rb
activemodel-4.0.3	lib/active_model/validations/absence.rb
activemodel-4.1.0.beta2	lib/active_model/validations/absence.rb