Consume local graphql schema directly from mesh

[jmargieh]

Hello,

In addition to the sources configured in the .meshrc.yml I would like to add a local graphql schema and provide a custom query implementation in the graphql mesh application.

meshrc.yml

sources:
  - name: BackendService
    handler:
      openapi:
        baseUrl: http://localhost:3002/
        source: ../../../backend-service/openapi3-definition.json
additionalResolvers:
  - "../resolvers/custom-resolver"
serve:
  customServerHandler: '../servers/fastify-apollo-server'

local graphql schema (consumed directly from the mesh gateway application) that I would like to also be part of the unified schema generated by the mesh:

mesh-gateway.schema.graphql

type Query {
entities: [Entity]
}

type Entity {
id: String!
title: String!
description: String!
}

and the custom-resolver would look like this:

custom-resolver.ts

import {Resolvers} from '../mesh-schema/.mesh';

const resolvers: Resolvers = {
    Query: {
      entities: {
          resolve: async (root, _args, context, info) => {
              const resp = await context.BackendService.Query.entities({root, args: {..._args}, context, info});
              resp.push(
                  {
                      id: 'my custom Id',
                      description: 'my description',
                      title: 'entity title'
                  }
              );
         // TODO: more things can be done here...
              return resp;
          }
      }
    }
};

export default resolvers;

Is it possible to achieve this using graphql mesh ?

[ardatan]

You can just use additionalTypeDefs and additionalResolvers for that. Also it is possible provide a local schema as a source;

https://github.com/Urigo/graphql-mesh/blob/master/examples/type-merging-batching-example/.meshrc.yml#L5