1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
module ActiveModel
module Validations
module ClassMethods
# Validates that the value of the specified attribute is not in a particular enumerable object.
#
# class Person < ActiveRecord::Base
# validates_exclusion_of :username, :in => %w( admin superuser ), :message => "You don't belong here"
# validates_exclusion_of :age, :in => 30..60, :message => "This site is only for under 30 and over 60"
# validates_exclusion_of :format, :in => %w( mov avi ), :message => "extension %s is not allowed"
# end
#
# Configuration options:
# * <tt>in</tt> - An enumerable object of items that the value shouldn't be part of
# * <tt>message</tt> - Specifies a customer error message (default is: "is reserved")
# * <tt>allow_nil</tt> - If set to true, skips this validation if the attribute is null (default is: false)
# * <tt>allow_blank</tt> - If set to true, skips this validation if the attribute is blank (default is: false)
# * <tt>if</tt> - Specifies a method, proc or string to call to determine if the validation should
# occur (e.g. :if => :allow_validation, or :if => Proc.new { |user| user.signup_step > 2 }). The
# method, proc or string should return or evaluate to a true or false value.
# * <tt>unless</tt> - Specifies a method, proc or string to call to determine if the validation should
# not occur (e.g. :unless => :skip_validation, or :unless => Proc.new { |user| user.signup_step <= 2 }). The
# method, proc or string should return or evaluate to a true or false value.
def validates_exclusion_of(*attr_names)
configuration = { :message => ActiveRecord::Errors.default_error_messages[:exclusion], :on => :save }
configuration.update(attr_names.extract_options!)
enum = configuration[:in] || configuration[:within]
raise(ArgumentError, "An object with the method include? is required must be supplied as the :in option of the configuration hash") unless enum.respond_to?("include?")
validates_each(attr_names, configuration) do |record, attr_name, value|
record.errors.add(attr_name, configuration[:message] % value) if enum.include?(value)
end
end
end
end
end
|
