bug #9647 use the correct class name to retrieve mapped class' metadata and reposi... (xabbuh)

This PR was merged into the 2.2 branch.

Discussion
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use the correct class name to retrieve mapped class' metadata and reposi...

...tory

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9646
| License       | MIT
| Doc PR        |

The validation context isn't necessarily the entity being validated. In case that you added the Unique Entity constraint inside your custom type via the ``constraints`` option the validation context will be the ``Form`` class itself. Thus, not the validation context should be used to get the class metadata and the repository of the validated entity, but the entity itself should be used.

Commits
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cd4df11 use the correct class name to retrieve mapped class' metadata and repository

Author: fabpot

src/Symfony/Bridge/Doctrine/Validator/Constraints/UniqueEntityValidator.php

@@ -74,8 +74,7 @@ public function validate($entity, Constraint $constraint)
             }
         }
 
-        $className = $this->context->getClassName();
-        $class = $em->getClassMetadata($className);
+        $class = $em->getClassMetadata(get_class($entity));
         /* @var $class \Doctrine\Common\Persistence\Mapping\ClassMetadata */
 
         $criteria = array();
@@ -110,7 +109,7 @@ public function validate($entity, Constraint $constraint)
             }
         }
 
-        $repository = $em->getRepository($className);
+        $repository = $em->getRepository(get_class($entity));
         $result = $repository->{$constraint->repositoryMethod}($criteria);
 
         /* If the result is a MongoCursor, it must be advanced to the first