diff options
Diffstat (limited to 'activemodel/lib/active_model/validations/confirmation.rb')
-rw-r--r-- | activemodel/lib/active_model/validations/confirmation.rb | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/activemodel/lib/active_model/validations/confirmation.rb b/activemodel/lib/active_model/validations/confirmation.rb new file mode 100644 index 0000000000..79c6635177 --- /dev/null +++ b/activemodel/lib/active_model/validations/confirmation.rb @@ -0,0 +1,44 @@ +module ActiveModel + module Validations + module ClassMethods + # 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 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, and by default only on save. To require confirmation, make sure to add a presence + # check for the confirmation attribute: + # + # validates_presence_of :password_confirmation, :if => :password_changed? + # + # Configuration options: + # * <tt>message</tt> - A custom error message (default is: "doesn't match confirmation") + # * <tt>on</tt> - Specifies when this validation is active (default is :save, other options :create, :update) + # * <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_confirmation_of(*attr_names) + configuration = { :message => ActiveRecord::Errors.default_error_messages[:confirmation], :on => :save } + configuration.update(attr_names.extract_options!) + + 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 + end + end +end
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