31 lines
1.1 KiB
Ruby
31 lines
1.1 KiB
Ruby
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+, +:allow_nil+, +:allow_blank+, and +:strict+.
|
|
# See <tt>ActiveModel::Validations#validates</tt> for more information
|
|
def validates_absence_of(*attr_names)
|
|
validates_with AbsenceValidator, _merge_attributes(attr_names)
|
|
end
|
|
end
|
|
end
|
|
end
|