Nexus: Interop with graphql-js

[janicduplessis]

I'm investigating using this to progressively replace graphql to generate the schema of a large application. Using types defined with graphql works well by referencing them using their name but I haven't found I way to use types defined with nexus inside a type defined with graphql.

I did try using extendType to extend my types defined using graphql but that doesn't seem to work currently. I'm getting a duplicate type error: Error: Schema must contain unique named types but contains multiple types named "Viewer"..

Here's a simplified example

const Viewer = new GraphQLObjectType({
  name: 'Viewer',
  fields: {
    name: { type: GraphQLString },
  },
});

// Using extendType to extend types defined with `graphql`
const NexusViewer = extendType({
  type: 'Viewer',
  definition(t) {
    t.int('age');
  },
});

const Query = new GraphQLObjectType({
  name: 'Query',
  fields: () => ({
    viewer: { type: Viewer },
  }),
});

const schema = makeSchema({
  types: [
    Query,
    NexusViewer,
  ],
});

Or alternatively provide a way to convert to a graphql type.

const NexusObjectType = objectType({ name: 'NexusObject' definition() { /* ... */ } });

const GraphQLObjectType = new GraphQLObject({
  name: 'GraphQLObject',
  fields: { nexus: { type: toGraphQLType(NexusObjectType) } }
});

[tgriesser]

Yep, this ties into #70 - there needs to be a better story around interop between the two - I'm going to be working more on this in the next few weeks, will comment here once I have something more well defined to test out fo this.

[stalniy]

I created an example which shows how graphql types can be used together with nexus: https://codesandbox.io/s/zqq7p9w1jp

In order to do this:

1. I extended nexus SchemaBuilder and overloadded getOrBuildType

```js
getOrBuildType(name, fromObject = false) {
   if (isType(name)) {
     return this.finalize(name);
   }

   return super.getOrBuildType(name, fromObject);
 }
```

1. And later you can easily reference native graphql types during nexus schema building process

Update: I found that this functionality already built-in :)

[tgriesser]

Check out #143 and see if this works any better with the newly published 0.12.0-beta.1

[thehappycoder]

@tgriesser If you still remember, can you point to the line in that huge PR?

[blazestudios23]

Hey did this get handled? I'm trying to use graphql-sequelize as it looks like it will save a ton of time.

Really I'm trying to auto-generate models by doing an introspection query on the DB with sequelize, then I want those models to generate the Nexus GraphQL types. This is completely possible and having to write out the DB schema two times is completely redundant.

[stalniy]

@blazestudios23 this works

[blazestudios23]

How do i integrate I just get errors, where's what I tried:

t.connectionField(`${TypeNames.name}s_connection`, {
            type: TypeNames.name,
            resolve: resolver(model.name)
        });

I also tried a few variations with:
connectionFromArray

[blazestudios23]

Update, GraphQL-Sequilize is working for a getOne query but doesn't work with:
t.connectionField