Sulu: error when trying to use custom data provider - sulu

Question

I'm following docs from here: https://docs.sulu.io/en/2.2/cookbook/smart-content-data-provider.html
Trying to make custom data provider for my custom entity type "MatchEvent":
I did it how it's explained here. Since I have services.yaml file I defined those 2 like this:
app.match_event_repository:
class: App\Repository\MatchEventRepository
factory: ['#doctrine', 'getRepository']
arguments:
- Symfony\Bridge\Doctrine\ManagerRegistry
app.smart_content.data_provider.matchevent:
class: App\SmartContent\MatchEventDataProvider
arguments: ['#app.match_event_repository', '#sulu_core.array_serializer', '#request_stack' ]
tags: [{name: 'sulu.content.type', alias: 'smart_matchevent_selection'}]
So, if I understood well, after that I should have my custom content data provider named "smart_matchevent_selection" and I can use it like this:
<property name="match" type="smart_content">
<meta>
<title lang="en">Match</title>
<title lang="de">Match</title>
</meta>
<params>
<param name="provider" value="smart_matchevent_selection"/>
</params>
</property>
But when I try to edit page containing this field I get error:
Missing parameter token in Sulu\Bundle\PreviewBundle\Controller\PreviewController
Exception is triggered at project/vendor/sulu/sulu/src/Sulu/Bundle/PreviewBundle/Controller/PreviewController.php:
public function stopAction(Request $request): Response
{
$this->preview->stop($this->getRequestParameter($request, 'token', true));
return new JsonResponse();
}
What I'm doing wrong here?

Answer 1

If you carefully look at the service definition of the SmartContentDataProvider in the documentation, you will notice that the tag should be {name: 'sulu.smart_content.data_provider', alias: 'match_events'} instead of {name: 'sulu.content.type', alias: 'smart_matchevent_selection'} ...
Then you can use it like <param name="provider" value="match_events"/>