method

validates_confirmation_of

v1.0.0 - Show latest stable - 0 notes - Class: ActiveRecord::Validations::ClassMethods

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What's this?

validates_confirmation_of(*attr_names) public

Encapsulates the pattern of wanting to validate a password or email address field with a confirmation. 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 person has to already have a password attribute (a column in the people table), but the password_confirmation is virtual. It exists only as an in-memory variable for validating the password. This check is performed only if password_confirmation is not nil and by default on save.

Configuration options:

message - A custom error message (default is: "doesn‘t match confirmation")
on - Specifies when this validation is active (default is :save, other options :create, :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.

Show source

# File activerecord/lib/active_record/validations.rb, line 324
      def validates_confirmation_of(*attr_names)
        configuration = { :message => ActiveRecord::Errors.default_error_messages[:confirmation], :on => :save }
        configuration.update(attr_names.pop) if attr_names.last.is_a?(Hash)

        attr_accessor *(attr_names.map { |n| "#{n}_confirmation" })

        validates_each(attr_names, configuration) do |record, attr_name, value|
          record.errors.add(attr_name, configuration[:message]) unless record.send("#{attr_name}_confirmation").nil? or value == record.send("#{attr_name}_confirmation")
        end
      end

validates_confirmation_of

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