Stitch input

[Warxcell]

Hello, its pretty easy to stitch output, but how to stitch input?

Use case is following: there is 1 microservice which provides data in form of questions to be shown, and other service which stores answers.

So there is Microservice questions, Microservice answers and FE.

FE will fetch and show questions from QUESTION microservice, then send mutation to store these questions - the issue is that gateway will receive the IDs of questions and it must stitch other info of question like title and send it to answers microservice.

Very simply overview:

Microservice questions:

type Question {
   id: ID!
   title: String!
}

Microservice Answer

input QuestionAnswerInput {
   question: QuestionInput!
   answer: String!
}

input QuestionInput {
   id: ID!
   title: String!
}

So gateway will must hide QuestionInput.title and internally fetch question where id = X and populate its title and pass it to answers microservice.

I've tried with

const questionnaire = await context.Questions.Query.question({
    context,
    selectionSet: gql`
      {
        .....
      }`,
    args: {
      id: input.questionId
    }
  });

but its type is not correct - it says it return Question | undefined, but on error it returns error.

Furthermore: I must add middleware to all mutations using this input, which is cucumbersome, because there are 2 currently. Is there way to add middleware to modify the input itself?

[Warxcell]