propel-bundle/Resources/doc/unique_object_validator.markdown

The UniqueObjectValidator

In a form, if you want to validate the unicity of a field in a table you have to use the UniqueObjectValidator. The only way to use it is in a validation.yml file, like this:

Acme\DemoBundle\Model\User:
    constraints:
        - Propel\PropelBundle\Validator\Constraints\UniqueObject: username

For validate the unicity of more than just one fields:

Acme\DemoBundle\Model\User:
    constraints:
        - Propel\PropelBundle\Validator\Constraints\UniqueObject: [username, login]

As many validator of this type as you want can be used.

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