require "active_model/validations/clusivity" module ActiveModel module Validations class InclusionValidator < EachValidator # :nodoc: include Clusivity def validate_each(record, attribute, value) unless include?(record, value) record.errors.add(attribute, :inclusion, options.except(:in, :within).merge!(value: value)) end end end module HelperMethods # Validates whether the value of the specified attribute is available in a # particular enumerable object. # # class Person < ActiveRecord::Base # validates_inclusion_of :gender, in: %w( m f ) # validates_inclusion_of :age, in: 0..99 # validates_inclusion_of :format, in: %w( jpg gif png ), message: "extension %{value} is not included in the list" # validates_inclusion_of :states, in: ->(person) { STATES[person.country] } # validates_inclusion_of :karma, in: :available_karmas # end # # Configuration options: # * :in - An enumerable object of available items. This can be # supplied as a proc, lambda or symbol which returns an enumerable. If the # enumerable is a numerical, time or datetime range the test is performed # with Range#cover?, otherwise with include?. When using # a proc or lambda the instance under validation is passed as an argument. # * :within - A synonym(or alias) for :in # * :message - Specifies a custom error message (default is: "is # not included in the list"). # # There is also a list of default options supported by every validator: # +:if+, +:unless+, +:on+, +:allow_nil+, +:allow_blank+, and +:strict+. # See ActiveModel::Validation#validates for more information def validates_inclusion_of(*attr_names) validates_with InclusionValidator, _merge_attributes(attr_names) end end end end