FOS rest bundle: unable to find template

I get the exception:
> Unable to find template ""

The other similar questions didn't help; and weirdly enough it was working fine and then suddenly started giving me this exception.

composer:
> "friendsofsymfony/rest-bundle": "0.13.*@dev",
> "jms/serializer-bundle": "0.12.*@dev",


I'm following [Automatic route generation: single RESTful controller (for simple resources)](

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)


config:

fos_rest:
format_listener: true
routing_loader:
default_format: json
view:
view_response_listener: 'force'
serializer:
serialize_null: true

sensio_framework_extra:
view: { annotations: false }
router: { annotations: true }

routing:

sectors:
type: rest
prefix: /{v}
resource: JJ\MainBundle\Controller\SectorsController

controller:

/**
* @RouteResource("Sector")
*/
class SectorsController extends Controller
...
public function cgetAction()
{
return $this->getSectorIndustryRepo()->findAll();
}

Annotate your controller action with `@View` to resolve this issue.

use FOS\RestBundle\View\View;

Have a look at the documentation [chapter View Response listener][1].


----------


If you don't want to annotate every action - you can set the @View annotation for a complete class using [my pull request here][2].

Add this to your composer.json to use the PR.

"require": {
"friendsofsymfony/rest-bundle": "dev-dev-view-addition as 0.12.0",

// ...

"repositories": [
{
"type": "vcs",
"url": "https://github.com/nifr/FOSRestBundle"
},


[1]:

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[2]:

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I managed to resolve this issue by setting the listener explicitly to false:

fos_rest:
format_listener: false

**EDIT**

This also works:

fos_rest:
format_listener:
prefer_extension: false
default_priorities:
- json

(For reference) If One is testing with a rest client or manually be sure to set the header in your request:
Accept:application/json

Because fosRestBundle tries to determine the proper response type from the headers in the request.

For FOSRestBundle version 2.0 the config should be

fos_rest:
format_listener:
rules:
prefer_extension: false
fallback_format: json