create new tag ASAP, because after composer update you get willdurand/negotiation v 2.3 and after that will work only first output normalizer with same format (e.g. json)

api_platform:
    formats:
        jsonld:  ['application/ld+json']
        jsonhal: ['application/hal+json']

request:
curl -X GET --header 'Accept: application/hal+json'
response is in 'ld+json' format (the first one in config)

We're aware of that @insekticid this is why the version should have been patched in #1102! See the root cause here. We're waiting for this to be merged to fix the issue :).

I understand, but you should add warning to Api Platform website, or create new Api Platform Core tag 2.0.8 with '"willdurand/negotiation": "^2.0.3 <2.3",' until this will be fixed

The new tag is here, this PR can be updated!

Hmm we have the same phpstan errors then in #1113

@dunglas could you set up a new tag (also in api-platform/api-platform)? Thanks!

@soyuka why?

Composer should take the last available version of the negotation library? If that's the case, never mind ;).

@soyuka yep. And when doing composer install, it will take an older one.

@dunglas Bumping the required version of willdurand/negotation is a BC break. 😞

I believe it should be:

"willdurand/negotiation": "^2.0.3 <2.3 || ^2.3.1",

I haven't seen this PR was merged. There is no need to do that as a new version of a new version of
willdurand/negotiation has been released. I've opened this PR just to run the test suite with the patched version.
I need to revert this PR.

Yeah sorry my bad, thought it was needed. I've reverted it in #1115