From d8fc381ebc89e3934f266bfb0c304ca241d5ad93 Mon Sep 17 00:00:00 2001 From: David Heinemeier Hansson Date: Sun, 24 Apr 2005 16:25:57 +0000 Subject: Added validates_exclusion_of as a negative of validates_inclusion_of git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1236 5ecf4fe2-1ee6-0310-87b1-e25e094e27de --- activerecord/lib/active_record/validations.rb | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'activerecord/lib/active_record') diff --git a/activerecord/lib/active_record/validations.rb b/activerecord/lib/active_record/validations.rb index fb8879ef2a..9af4010a51 100755 --- a/activerecord/lib/active_record/validations.rb +++ b/activerecord/lib/active_record/validations.rb @@ -11,6 +11,7 @@ module ActiveRecord @@default_error_messages = { :inclusion => "is not included in the list", + :exclusion => "is reserved", :invalid => "is invalid", :confirmation => "doesn't match confirmation", :accepted => "must be accepted", @@ -470,6 +471,30 @@ module ActiveRecord end end + # 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" + # end + # + # Configuration options: + # * in - An enumerable object of items that the value shouldn't be part of + # * message - Specifies a customer error message (default is: "is reserved") + # * allow_nil - If set to true, skips this validation if the attribute is null (default is: false) + def validates_exclusion_of(*attr_names) + configuration = { :message => ActiveRecord::Errors.default_error_messages[:exclusion], :on => :save } + configuration.update(attr_names.pop) if attr_names.last.is_a?(Hash) + + 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]) if enum.include?(value) + end + end + # Validates whether the associated object or objects are all themselves valid. Works with any kind of association. # # class Book < ActiveRecord::Base -- cgit v1.2.3