Simple Github REST and Github GraphQL example

[Luna-v0]

Hi,

I was trying to create a simple example for joing data from multiple API paradigms (GraphQL and REST for this case) using mesh, and since Github REST and GraphQL APIs uses same types of Identification, I thought it would be a good example. But I'm having issues.

This is the mesh.config.ts file I used:

import {
  defineConfig,
  loadGraphQLHTTPSubgraph,
} from "@graphql-mesh/compose-cli";
import { loadOpenAPISubgraph } from "@omnigraph/openapi";

export const composeConfig = defineConfig({
  subgraphs: [
    {
      sourceHandler: loadOpenAPISubgraph("GithubRest", {
        source:
          "https://raw.githubusercontent.com/github/rest-api-description/refs/heads/main/descriptions-next/api.github.com/api.github.com.json",
      }), // current github OpenAPI
    },
    {
      sourceHandler: loadGraphQLHTTPSubgraph("GithubGraphQL", {
        endpoint: "https://api.github.com/graphql",
        source: "https://docs.github.com/public/fpt/schema.docs.graphql",
      }), // current github GraphQL Schema
    },
  ],
});

But every time I try to run it it gives me a lot of errors like this:

ERROR Mesh Compose  The following supergraph API query:
{
  packages_list_docker_migration_conflicting_packages_for_organization(org: "A string value") {
    ... on Package {
      repository {
        usesCustomOpenGraphImage
      }
    }
  }
}
cannot be satisfied by the subgraphs because:
- from subgraph "GithubRest":
  - cannot find field "Repository.usesCustomOpenGraphImage".
  - cannot move to subgraph "GithubGraphQL", which has field "Repository.usesCustomOpenGraphImage", because type "Repository" has no @key defined in subgraph "GithubGraphQL". 

I have tried to rename and give each API a prefix because I imagine that a naming conflict would result on this and that didn't work. I also tried to use the semantic conventions and that didn't work either. I also tested running them separated and that worked fine.

I just want to understand what a solution to solve those conflicts would look like.