Fix exception when configuration is used without doctrine/orm nor doctrine/common

[webnet-fr]

Q	A
Branch?	master
Bug fix?	yes
New feature?	no
Fixed tickets	symfony/symfony#29390

Hi there is a ReflectionException Class Doctrine\Common\Proxy\AbstractProxyFactory does not exist when the DoctrineBundle is used without doctrine/common being installed.

Consider this scenario

1. Here are deps in the composer.json of my project:

"require": {
    "php": "^7.1.3",
    "ext-ctype": "*",
    "ext-iconv": "*",
    "symfony/console": "4.2.*",
    "symfony/flex": "^1.1",
    "symfony/framework-bundle": "4.2.*",
    "symfony/yaml": "4.2.*"
},

2. I install DoctrineBundle with require doctrine/doctrine-bundle.

3. I activate DoctrineBundle in Kernel. This entails ReflectionException Class Doctrine\Common\Proxy\AbstractProxyFactory does not exist exception.

So when people only need doctrine/dbal and doctrine/doctrine-bundle in theirs projects are forced to install doctrine/common just to avoid this exctption.

This PR resolves the issue.

Cheers.

[Majkl578]

Looks good, can you please add a test?

[webnet-fr]

Hi @Majkl578. It's done!

[Philipp91]

@webnet-fr Just in case GitHub didn't notify you: The unit test fails on Travis.

[kimhemsoe]

Ready? :D

[webnet-fr]

@kimhemsoe yep!

[kimhemsoe]

@Majkl578 ping :)

Tests added.

[alcaeus]

I've squashed your commits and rebased on top of 1.10.x so this can go in as bugfix in the next patch release. Thanks for your contribution, @webnet-fr!

[petrofcikmatus]

Will you please release 1.10.1 with this PR merged? It has been merged 24 days ago.

I created new symfony 4.2.x project today and I still got this exception. This might be frustrating for new developers.

cc @kimhemsoe

edit: I noticed there is PR #884 in 1.10.1 milestone, but without activity since 4th December.

[alcaeus]

I'll take time to release 1.10.1 on Monday 👍

[alcaeus]

1.10.1 has been released.