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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:
# * <tt>:in</tt> - 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 <tt>Range#cover?</tt>, otherwise with <tt>include?</tt>. When using
# a proc or lambda the instance under validation is passed as an argument.
# * <tt>:within</tt> - A synonym(or alias) for <tt>:in</tt>
# * <tt>:message</tt> - 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 <tt>ActiveModel::Validation#validates</tt> for more information
def validates_inclusion_of(*attr_names)
validates_with InclusionValidator, _merge_attributes(attr_names)
end
end
end
end
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