2.0.0-beta.1: Mutations without fields not generated correctly

[bcksl]

The generator becomes unhappy about relation tables without additional params. Completely possible that this is expected behaviour but I don't believe the GraphQL spec requires mutations to have args. That said, the mutation should probably just not be generated.

Doesn't work:

model UsersPosts {
  user   User @relation(fields: [userId], references: [id])
  userId Int
  post   Post @relation(fields: [postId], references: [id])
  postId Int

  @@id([postId, userId])
}

/home/bcksl/repo/tgql-demo/node_modules/type-graphql/dist/schema/schema-generator.js:20
                throw new errors_1.GeneratingSchemaError(errors);
                      ^
GeneratingSchemaError: Some errors occurred while generating GraphQL schema:
  Input Object type UsersPostsUpdateManyMutationInput must define one or more fields.
Please check the `details` property of the error to get more detailed info.
    at Function.generateFromMetadata (/home/bcksl/repo/tgql-demo/node_modules/type-graphql/dist/schema/schema-generator.js:20:23)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at async buildSchema (/home/bcksl/repo/tgql-demo/node_modules/type-graphql/dist/utils/buildSchema.js:11:20)
    at async /home/bcksl/repo/tgql-demo/src/index.ts:31:18 {
  details: [
    GraphQLError: Input Object type UsersPostsUpdateManyMutationInput must define one or more fields.
        at SchemaValidationContext.reportError (/home/bcksl/repo/tgql-demo/node_modules/graphql/type/validate.js:73:7)
        at validateInputFields (/home/bcksl/repo/tgql-demo/node_modules/graphql/type/validate.js:532:13)
        at validateTypes (/home/bcksl/repo/tgql-demo/node_modules/graphql/type/validate.js:260:7)
        at validateSchema (/home/bcksl/repo/tgql-demo/node_modules/graphql/type/validate.js:43:3)
        at graphqlImpl (/home/bcksl/repo/tgql-demo/node_modules/graphql/graphql.js:60:63)
        at /home/bcksl/repo/tgql-demo/node_modules/graphql/graphql.js:23:43
        at new Promise (<anonymous>)
        at graphql (/home/bcksl/repo/tgql-demo/node_modules/graphql/graphql.js:23:10)
        at Function.generateFromMetadata (/home/bcksl/repo/tgql-demo/node_modules/type-graphql/dist/schema/schema-generator.js:18:60)
        at buildSchema (/home/bcksl/repo/tgql-demo/node_modules/type-graphql/dist/utils/buildSchema.js:11:61) {
      path: undefined,
      locations: undefined,
      extensions: [Object: null prototype] {}
    }
  ]
}

Works:

model UsersPosts {
  user   User @relation(fields: [userId], references: [id])
  userId Int
  post   Post @relation(fields: [postId], references: [id])
  postId Int
  unused Int

  @@id([postId, userId])
}

• Node v16.19.0
• typegraphql-prisma version 2.0.0-beta.1
• Prisma version 4.10.1
• TypeScript version 4.9.5

[MichalLytek]

Duplicate of #19 🔒