RESTDataSource with TypeScript

I’m using apollo-server-hapi and I’m defining my server like this:

  interface MyDataSources {
    injuryAPI: InjuryDataSource,
    appointmentAPI: AppointmentDataSource,
  }

  const server = new ApolloServer({
    schema,
    dataSources: (): DataSources<MyDataSources> => ({
      injuryAPI: new InjuryDataSource(),
      appointmentAPI: new AppointmentDataSource(),
    }),
    context: ({ request }): GraphQLCustomContext => ({
      credentials: { token: request.headers['Authorization'] || '' },
    }),
  });

This works fine, but then I lose type safety on the resolvers - dataSources is of type any.

If I create my server like this I get the type safety on the resolvers, but I receive the error fetch is undefined:

const server = new ApolloServer({
    schema,
    context: ({ request }): GraphQLCustomResolversContext => ({
      dataSources: {
        injuryAPI: new InjuryDataSource(),
        appointmentAPI: new AppointmentDataSource(),
      },
      credentials: { token: request.headers['Authorization'] || '' },
    }),
  });

Does anyone have a solution for using the RESTDataSource with TypeScript and getting type safety?

[mikefisher84]

How did you guys solve this? Would like to know!

[EthanSK]

A config option in the codegen.yml file for specifying the datasource type would be very helpful. There is currently one for context type: contextType: ./context#MyContext but not for datasource type!!