GraphQL broke after some commit

[bunkerskyi]

Hi. I'm wanted to check new feature for GraphQL with filters for nested property (#1868) but if i'm require on composer this commit (c139586) i got "500 Internal Server Error" for any POST request on "api_graphql_entrypoint" without errors on log or profiler.
I checked and this occurs after 2e0c647 commit (on previous b54979b commit all is OK).

I'm not sure that I understand everything correctly, so I ask for help in solving this problem

[antograssiot]

This PR was only merged in 2.2 branch but not in master. Are you sure you were not using the master branch before ?

[bunkerskyi]

I not sure. Required api-platform/core:2.2.x-dev package, not dev-master (2.3.x).

My composer.json:

{
...
    "require": {
        "php": "^7.1.3",
        "api-platform/api-pack": "^1.1",
        "api-platform/core": "2.2.x-dev",
        ...
    },
    ...
}

What's composer print on adding package:

kribetko@kribetko-laptop:~/PhpstormProjects/MyProject$ composer require api-platform/core:2.2.x-dev
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 0 installs, 1 update, 0 removals
  - Removing api-platform/core (v2.2.5)
  - Installing api-platform/core (2.2.x-dev d805e9a): Loading from cache
Writing lock file
Generating autoload files
ocramius/package-versions:  Generating version class...
ocramius/package-versions: ...done generating version class
Executing script cache:clear [OK]
Executing script assets:install --symlink --relative public [OK]

Also deleted vendor folder for reinstall all packages

[antograssiot]

So I've been digging quickly into it and the addition on filtering for nested entity is not the root cause, it seems that introspection is broken since InputUnionType usage addition in the SchemaBuilder v2.2.5...d805e9a#diff-b7cf573372ef33efd3ea514a70783519L344

There are discussions already in #1858 and they are trying to fix this upstream

[bunkerskyi]

So, it is not possible to use the functionality of your PR (#1868) yet? I have to wait for fix in the webonyx/graphql-php?

[antograssiot]

@KriBetko I don't know, except the broken introspection, every POST request are working fine in my app using CURL and/or GraphiQL.
Are you able to provide a failing test case or to push the minimal app that could help to understand/reproduce your issue to github ?

[alanpoulain]

The issue is only with introspection and it shouldn't affect the requests.
I was hoping a quick fix in graphql-php but it doesn't seem to happen soon so I will propose a dirty way to fix it soon.