diff --git a/cookbook/validation/custom_constraint.rst b/cookbook/validation/custom_constraint.rst
index 20244298499..b8b4ccbc2a2 100644
--- a/cookbook/validation/custom_constraint.rst
+++ b/cookbook/validation/custom_constraint.rst
@@ -161,7 +161,7 @@ Constraint Validators with Dependencies
If your constraint validator has dependencies, such as a database connection,
it will need to be configured as a service in the Dependency Injection
Container. This service must include the ``validator.constraint_validator``
-tag and an ``alias`` attribute:
+tag and may include an ``alias`` attribute:
.. configuration-block::
@@ -189,21 +189,14 @@ tag and an ``alias`` attribute:
->register('validator.unique.your_validator_name', 'Fully\Qualified\Validator\Class\Name')
->addTag('validator.constraint_validator', array('alias' => 'alias_name'));
-Your constraint class should now use this alias to reference the appropriate
-validator::
+As mentioned above, Symfony will automatically look for a class named after
+the constraint, with ``Validator`` appended. You can override this in your constraint class::
public function validatedBy()
{
- return 'alias_name';
+ return 'Fully\Qualified\ConstraintValidator\Class\Name'; // or 'alias_name' if provided
}
-As mentioned above, Symfony will automatically look for a class named after
-the constraint, with ``Validator`` appended. If your constraint validator
-is defined as a service, it's important that you override the
-``validatedBy()`` method to return the alias used when defining your service,
-otherwise Symfony won't use the constraint validator service, and will
-instantiate the class instead, without any dependencies injected.
-
Class Constraint Validator
~~~~~~~~~~~~~~~~~~~~~~~~~~
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