Yarn 2.0 - No provider for [object Object]!

[brvnonascimento]

I'm suddenly having the following error, even though I'm not doing any Dependency Injection yet. All classes that I'm importing into my resolvers are already pre-injected.

Also tried to JSON.stringify the exception error on Apollo Server Plugins, but without success.

{
  "errors": [
    {
      "message": "No provider for [object Object]! - in Module \"auth\" (Singleton Scope) (Proxy)",
      "locations": [
        {
          "line": 2,
          "column": 3
        }
      ],
      "path": [
        "register"
      ],
      "extensions": {
        "code": "INTERNAL_SERVER_ERROR",
        "exception": {
          "keys": [
            {
              "token": {
                "token": {
                  "_desc": "module-id"
                },
                "id": 0
              },
              "id": 1
            }
          ],
          "message": "No provider for [object Object]! - in Module \"auth\" (Singleton Scope) (Proxy)",
          "stacktrace": [
            "Error: No provider for [object Object]! - in Module \"auth\" (Singleton Scope) (Proxy)",
            "    at injectionError (/Users/macbook-user/webdev/ecommerce-ddd/.yarn/$$virtual/graphql-modules-virtual-533ebcb5a3/0/cache/graphql-modules-npm-1.0.0-alpha.2-cd255ebe7e-3876f7a968.zip/node_modules/graphql-modules/index.cjs.js:218:11)",
            "    at noProviderError (/Users/macbook-user/webdev/ecommerce-ddd/.yarn/$$virtual/graphql-modules-virtual-533ebcb5a3/0/cache/graphql-modules-npm-1.0.0-alpha.2-cd255ebe7e-3876f7a968.zip/node_modules/graphql-modules/index.cjs.js:204:12)",
            "    at ReflectiveInjector._throwOrNull (/Users/macbook-user/webdev/ecommerce-ddd/.yarn/$$virtual/graphql-modules-virtual-533ebcb5a3/0/cache/graphql-modules-npm-1.0.0-alpha.2-cd255ebe7e-3876f7a968.zip/node_modules/graphql-modules/index.cjs.js:561:19)",
            "    at ReflectiveInjector._getByKey (/Users/macbook-user/webdev/ecommerce-ddd/.yarn/$$virtual/graphql-modules-virtual-533ebcb5a3/0/cache/graphql-modules-npm-1.0.0-alpha.2-cd255ebe7e-3876f7a968.zip/node_modules/graphql-modules/index.cjs.js:535:21)",
            "    at ReflectiveInjector.get (/Users/macbook-user/webdev/ecommerce-ddd/.yarn/$$virtual/graphql-modules-virtual-533ebcb5a3/0/cache/graphql-modules-npm-1.0.0-alpha.2-cd255ebe7e-3876f7a968.zip/node_modules/graphql-modules/index.cjs.js:499:21)",
            "    at /Users/macbook-user/webdev/ecommerce-ddd/.yarn/$$virtual/graphql-modules-virtual-533ebcb5a3/0/cache/graphql-modules-npm-1.0.0-alpha.2-cd255ebe7e-3876f7a968.zip/node_modules/graphql-modules/index.cjs.js:503:18",
            "    at Array.forEach (<anonymous>)",
            "    at ReflectiveInjector.instantiateAll (/Users/macbook-user/webdev/ecommerce-ddd/.yarn/$$virtual/graphql-modules-virtual-533ebcb5a3/0/cache/graphql-modules-npm-1.0.0-alpha.2-cd255ebe7e-3876f7a968.zip/node_modules/graphql-modules/index.cjs.js:502:25)",
            "    at Function.createWithExecutionContext (/Users/macbook-user/webdev/ecommerce-ddd/.yarn/$$virtual/graphql-modules-virtual-533ebcb5a3/0/cache/graphql-modules-npm-1.0.0-alpha.2-cd255ebe7e-3876f7a968.zip/node_modules/graphql-modules/index.cjs.js:486:21)",
            "    at Object.ɵgetModuleContext (/Users/macbook-user/webdev/ecommerce-ddd/.yarn/$$virtual/graphql-modules-virtual-533ebcb5a3/0/cache/graphql-modules-npm-1.0.0-alpha.2-cd255ebe7e-3876f7a968.zip/node_modules/graphql-modules/index.cjs.js:846:81)"
          ]
        }
      }
    }
  ],
  "data": {
    "register": null
  }
}

[brvnonascimento]

I'm using a Yarn v2 Monorepo and I've found out that the problem was happening every-time I imported a Module created on another package.

I have a package/workspace for the Apollo Server (@package/graphql-api) and another one for handling the core business logic of my application (@package/core) from which I export the GraphQL Modules. If I define a Module directly into @package/graphql-api it works just fine, but not if:

import { AuthModule } from '@package/core' 

I was able to solve the problem by installing GraphQL Modules only in the @package/core and then doing:

export * from 'graphql-modules'

So I could import in @package/graphql-api:

import { createApplication } from '@package/core'

It solved the problem, but I don't think that is a good practice.