joshblack / build-a-graphql-server Goto Github PK

Hey @joshblack

I was following the egghead tutorial: https://egghead.io/courses/build-a-graphql-server to build a GraphQL server. I've noticed that querying videos by it's IDs doesn't currently work and was wondering if you'd know what's the issue? I'd tried fixing it but couldn't figure out the right approach.

Querying nodes by it's ID works correctly.

Looking up all videos like this:

query Videos {
  videos {
    edges {
      node {
        id
        title
      }
    }
  }
}

gives us the following result

{
  "data": {
    "videos": {
      "edges": [
        {
          "node": {
            "id": "VmlkZW86YQ==",
            "title": "Create a GraphQL Schema"
          }
        },
        {
          "node": {
            "id": "VmlkZW86Yg==",
            "title": "Ember.js CLI"
          }
        }
      ]
    }
  }
}

If we query nodes for the following ID: VmlkZW86Yg==

query NodeById {
  node(id: "VmlkZW86YQ==") {
    ... on Video {
      title
    }
  }
}

everything seems OK and we get

{
  "data": {
    "node": {
      "title": "Create a GraphQL Schema"
    }
  }
}

but trying the same for videos doesn't return the correct video

query VideoById {
  video(id: "VmlkZW86YQ==") {
    title
  }
}

returns

{
  "data": {
    "video": null
  }
}

I believe it's got something to do with translating global ID, but I can't figure it out.

ps: Thanks for such a great tutorial, me and my team have really enjoyed it!

Hi Josh,

Loved your course on egghead and found it incredibly helpful in setting up my first graphql server. I found most of it to be very well explained, but I did find myself giving a half-head-tilt trying to understand why in "Use Arguments in a GraphQL Query" the video variable had to be wrapped in square brackets [] to work.

At first I thought it was because it was returning an array, so I thought this might also work...

const getVideoById = (id) => new Promise( resolve => {
    const video = videos.filter( video => {
        return video.id === id;
    });
    resolve([video])
});

But that's obviously not right because that throws an error. Would you mind helping me understand? Thanks!