Mercurius Federation Gateway not working

[all2pie]

Did you read the migration guide?

• [X] I have read the whole migration guide

Is there an existing issue that is already proposing this?

• [X] I have searched the existing issues

Potential Commit/PR that introduced the regression

No response

Versions

8.0.0 -> 9.0.3

Describe the regression

After upgrading the Nestjs to V9 the Federation Gateway stopped working and is giving this error:

mercurius-fedration-gateway-bug-nestjs\node_modules\graphql\error\syntaxError.js:15
  return new _GraphQLError.GraphQLError(`Syntax Error: ${description}`, {
         ^
GraphQLError: Syntax Error: Unexpected Name "on".
    at syntaxError (C:\Work\Bugs\mercurius-fedration-gateway-bug-nestjs\node_modules\graphql\error\syntaxError.js:15:10)
    at Parser.unexpected (C:\Work\Bugs\mercurius-fedration-gateway-bug-nestjs\node_modules\graphql\language\parser.js:1476:41)
    at Parser.parseDefinition (C:\Work\Bugs\mercurius-fedration-gateway-bug-nestjs\node_modules\graphql\language\parser.js:211:16)
    at Parser.many (C:\Work\Bugs\mercurius-fedration-gateway-bug-nestjs\node_modules\graphql\language\parser.js:1529:26)
    at Parser.parseDocument (C:\Work\Bugs\mercurius-fedration-gateway-bug-nestjs\node_modules\graphql\language\parser.js:121:25)
    at parse (C:\Work\Bugs\mercurius-fedration-gateway-bug-nestjs\node_modules\graphql\language\parser.js:32:17)
    at buildFederationSchema (C:\Work\Bugs\mercurius-fedration-gateway-bug-nestjs\node_modules\mercurius\lib\federation.js:279:32)
    at buildGateway (C:\Work\Bugs\mercurius-fedration-gateway-bug-nestjs\node_modules\mercurius\lib\gateway.js:316:18)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at fp.name (C:\Work\Bugs\mercurius-fedration-gateway-bug-nestjs\node_modules\mercurius\index.js:233:15)

It works fine if there is only single service in the services array in gateway.module.ts, but its giving the above error with multiple services

Minimum reproduction code

https://github.com/all2pie/nestjs-mercurius-fedration-gateway-issue

Expected behavior

The gateway should work fine

Other

No response

[begninix]

You can fix this problem by setting the version of @apollo/subgraph in your services package.json to 2.0.2.

"dependencies": { "@apollo/subgraph": "2.0.2", ... },

[AmineYagoub]

Will there be any real fix for this? Because @begninix solution not work.

[sushilkjaiswar]

Will there be any real fix for this? Because @begninix solution not work.

Do you have any solution for this issue ? I am facing same issue and where federation with more than one service throws syntax error "Syntax Error: Unexpected "@". Single service works fine with federation when using Mercurius with Nestjs

[alexandre-dev29]

is there any solution for this?? I am facing the same issue 😩

[sushilkjaiswar]

is there any solution for this?? I am facing the same issue 😩

I did manage to pass all issues and was able to run the server successfully. I had to fix the schema(I use schema first approach) and updated Mercurius federation lib to fix the issue. Still not sure if the solution will be accepted by Mercurius author.

[kamilmysliwiec]

This doesn't seem to be related to NestJS integration packages