module ActiveModel # == Active Model Confirmation Validator module Validations class ConfirmationValidator < EachValidator def validate_each(record, attribute, value) if (confirmed = record.send("#{attribute}_confirmation")) && (value != confirmed) record.errors.add(attribute, :confirmation, options) end end def setup(klass) klass.send(:attr_accessor, *attributes.map do |attribute| :"#{attribute}_confirmation" unless klass.method_defined?(:"#{attribute}_confirmation") end.compact) end end module HelperMethods # Encapsulates the pattern of wanting to validate a password or email # address field with a confirmation. For example: # # Model: # class Person < ActiveRecord::Base # validates_confirmation_of :user_name, :password # validates_confirmation_of :email_address, # :message => "should match confirmation" # end # # View: # <%= password_field "person", "password" %> # <%= password_field "person", "password_confirmation" %> # # The added +password_confirmation+ attribute is virtual; it exists only # as an in-memory attribute for validating the password. To achieve this, # the validation adds accessors to the model for the confirmation # attribute. # # NOTE: This check is performed only if +password_confirmation+ is not # +nil+. To require confirmation, make sure # to add a presence check for the confirmation attribute: # # validates_presence_of :password_confirmation, :if => :password_changed? # # Configuration options: # * :message - A custom error message (default is: "doesn't match # confirmation"). # * :on - Specifies when this validation is active. Runs in all # validation contexts by default (+nil+), other options are :create # and :update. # * :if - 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. # * :unless - 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. # * :strict - Specifies whether validation should be strict. # See ActiveModel::Validation#validates! for more information def validates_confirmation_of(*attr_names) validates_with ConfirmationValidator, _merge_attributes(attr_names) end end end end