Encapsulates the pattern of wanting to validate a password or email address field with a confirmation.
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: âdoesn't match confirmationâ).
There is also a list of default options supported by every validator:
:if
, :unless
, :on
,
:allow_nil
, :allow_blank
, and
:strict
. See ActiveModel::Validation#validates
for more information
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