Symfony make entity command results in Exception

[snipershady]

Bug Report

Symfony make entity command results in Exception

Q	A
BUG	yes
Version	2.12

Summary

Symfony make entity command results in Exception

Current behavior

symfony console make:entity

[critical] Error thrown while running command "make:entity". Message: "Cannot access protected property Doctrine\ORM\Mapping\Driver\AttributeDriver::$classNames"

How to reproduce

• Set up new Symfony project
• Use doctrine/orm 2.12 package
• run make:entity

Expected behavior

No exception

Temporary workaround

Downgrade
doctrine/orm to 2.11.2

[greg0ire]

Please provide a stack trace

[snipershady]

php bin/console make:entity --verbose

In DoctrineHelper.php line 187:
                                                                                              
  [Error]                                                                                     
  Cannot access protected property Doctrine\ORM\Mapping\Driver\AnnotationDriver::$classNames  

Exception trace:
  at /home/shady/public_html/mynewproject/vendor/symfony/maker-bundle/src/Doctrine/DoctrineHelper.php:187
 ReflectionProperty->setValue() at /home/shady/public_html/mynewproject/vendor/symfony/maker-bundle/src/Doctrine/DoctrineHelper.php:187
 Symfony\Bundle\MakerBundle\Doctrine\DoctrineHelper->getMetadata() at /home/shady/public_html/mynewproject/vendor/symfony/maker-bundle/src/Doctrine/DoctrineHelper.php:162
 Symfony\Bundle\MakerBundle\Doctrine\DoctrineHelper->getEntitiesForAutocomplete() at /home/shady/public_html/mynewproject/vendor/symfony/maker-bundle/src/Maker/MakeEntity.php:515
 Symfony\Bundle\MakerBundle\Maker\MakeEntity->createEntityClassQuestion() at /home/shady/public_html/mynewproject/vendor/symfony/maker-bundle/src/Maker/MakeEntity.php:116
 Symfony\Bundle\MakerBundle\Maker\MakeEntity->interact() at /home/shady/public_html/mynewproject/vendor/symfony/maker-bundle/src/Command/MakerCommand.php:99
 Symfony\Bundle\MakerBundle\Command\MakerCommand->interact() at /home/shady/public_html/mynewproject/vendor/symfony/console/Command/Command.php:276
 Symfony\Component\Console\Command\Command->run() at /home/shady/public_html/mynewproject/vendor/symfony/console/Application.php:1007
 Symfony\Component\Console\Application->doRunCommand() at /home/shady/public_html/mynewproject/vendor/symfony/framework-bundle/Console/Application.php:94
 Symfony\Bundle\FrameworkBundle\Console\Application->doRunCommand() at /home/shady/public_html/mynewproject/vendor/symfony/console/Application.php:299
 Symfony\Component\Console\Application->doRun() at /home/shady/public_html/mynewproject/vendor/symfony/framework-bundle/Console/Application.php:80
 Symfony\Bundle\FrameworkBundle\Console\Application->doRun() at /home/shady/public_html/mynewproject/vendor/symfony/console/Application.php:171
 Symfony\Component\Console\Application->run() at /home/shady/public_html/mynewproject/vendor/symfony/runtime/Runner/Symfony/ConsoleApplicationRunner.php:54
 Symfony\Component\Runtime\Runner\Symfony\ConsoleApplicationRunner->run() at /home/shady/public_html/mynewproject/vendor/autoload_runtime.php:29
 require_once() at /home/shady/public_html/mynewproject/bin/console:11

make:entity [-a|--api-resource] [-b|--broadcast] [--regenerate] [--overwrite] [--] [<name>]

[greg0ire]

This should be reported to Symfony, and happens here: https://github.com/symfony/maker-bundle/blob/c5575532031eab8592ab6b1226e893b1a6b5bb0e/src/Doctrine/DoctrineHelper.php#L180-L187

It is caused by doctrine/persistence#246, but we cannot be held responsible by this as accessing protected properties through reflection is not really supposed to be supported. Also note the bug was revealed by something I'm probably going to have to revert in #9670 . So it might vanish in future versions, and come back later.