Symfony2 FOSREST JMS\Serializer bundles error

Question

Can you help to fix the following error?

InvalidArgumentException: "fos_rest.serializer" must implement FOS\RestBundle\Serializer\Serializer (instance of "JMS\Serializer\Serializer" given).
in C:\wamp\www\SymfonyRestAPI\src\FOS\RestBundle\DependencyInjection\Compiler\SerializerConfigurationPass.php line 58
at SerializerConfigurationPass->process(object(ContainerBuilder)) in C:\wamp\www\SymfonyRestAPI\vendor\symfony\symfony\src\Symfony\Component\DependencyInjection\Compiler\Compiler.php line 117
at Compiler->compile(object(ContainerBuilder)) in C:\wamp\www\SymfonyRestAPI\vendor\symfony\symfony\src\Symfony\Component\DependencyInjection\ContainerBuilder.php line 613
at ContainerBuilder->compile() in C:\wamp\www\SymfonyRestAPI\app\bootstrap.php.cache line 2502
at Kernel->initializeContainer() in C:\wamp\www\SymfonyRestAPI\app\bootstrap.php.cache line 2281
at Kernel->boot() in C:\wamp\www\SymfonyRestAPI\app\bootstrap.php.cache line 2312
at Kernel->handle(object(Request)) in C:\wamp\www\SymfonyRestAPI\web\app_dev.php line 28

This is too broad. But i think you must add the code of your config file. Which class is related to "fos_rest.serializer" — Brice Favre, Mar 14 '16 at 09:16
I followed all the steps of symfony tutorial but always the same error, in appKernel.php file i added new FOS\RestBundle\FOSRestBundle(), new JMS\SerializerBundle\JMSSerializerBundle() — Ndb, Mar 14 '16 at 09:21
in composer.json i added "friendsofsymfony/rest-bundle": "0.11.*", "jms/serializer-bundle": "0.12.x-dev" but same error again — Ndb, Mar 14 '16 at 09:23
Please add the content of your comments in the answer. You should provide a [mcve]. — A.L, Mar 14 '16 at 14:27
@A.L probably means: 'Please add the content of your comments in the *question*' — GitaarLAB, Mar 31 '16 at 16:01

Guilhem N · Answer 1 · 2016-03-31T16:44:24.090

This exception has been introduced in FOSRestBundle 2.0 (see here) because of a serializer abstraction layer introduced in 2.0 too. It is normally automatically managed by the bundle which detects the JMS serializer.

Did you add the JMSSerializerBundle to your kernel as following?

// app/AppKernel.php
class AppKernel extends Kernel
{
    public function registerBundles()
    {
        $bundles = array(
            // ...
            new JMS\SerializerBundle\JMSSerializerBundle(),,
        );

        // ...
    }
}

This should be the problem here.

If it isn't, then maybe you tried to define directly the serializer FOSRestBundle uses, the following is a bad practice most of the time and should only be used if you know what you do:

// services.yml
services:
    fos_rest.serializer:
        // This won't work in case your class doesn't
        // implement FOS\RestBundle\Serializer\Serializer
        class: My\Serializer

If my second proposition is your case, you custom serializer has to implement the interface FOS\RestBundle\Serializer\Serializer.

How do you do that? Can you please explain it in your answer? — A.L, Mar 31 '16 at 16:05
Sorry I mean this could be what makes this error happen, I'll improve my answer. — Guilhem N, Mar 31 '16 at 16:07
https://github.com/FriendsOfSymfony/FOSRestBundle/commit/db66463430d048fbe38619df35490c2980c3e82c#diff-b4c2bb665099019e5209acdfe6371d2a — Mick, Oct 17 '17 at 01:01

Symfony2 FOSREST JMS\Serializer bundles error

1 Answers1