Submit an array of objects as a query variable in graphQL

问题

How can I structure the query parameters a graphQL mutation when one of the fields is an array of objects? When I hard-code the mutation this is valid and works:

mutation{
  submitResponse(user: "1234", responses: [{ answerId: "wmtBCWtkSeDs5meBe", selected: false}, { answerId: "wmtBCWtkSeDs5meBz", selected: true}]) {
    id
  }
}

I can't for the life of me figure out how to pass in query parameters for the responses array of objects. How can I define the type of each field in the object. This is what it would like for the user id and that works fine but I can't figure out the responses piece of it.

mutation submitResponse($user: ID!){
  submitResponse(user: $user, responses: [{ answerId: "wmtBCWtkSeDs5meBe", selected: false}, { answerId: "wmtBCWtkSeDs5meBz", selected: true}]) {
    id
  }
}

Thanks!

回答1:

I know that the question is old, but maybe someone else needs simple solution.

1. Set type of responses as String!

   mutation submitResponse($user: ID!, $responses: String!){
     submitResponse(user: $user, responses: $responses) {
       id
     }
   }
   

2. Then:

   yourData = [{ answerId: "wmtBCWtkSeDs5meBe", selected: false}, { answerId: "wmtBCWtkSeDs5meBz", selected: true}]
   responses = JSON.stringify(yourData)
   

3. In my case in BackEnd I use Python, so receive responses in BackEnd and then simply convert JSON (string) to Python's dict, something like:

   import json
   responses = json.loads(input.get('responses'))
   

来源：https://stackoverflow.com/questions/45910230/submit-an-array-of-objects-as-a-query-variable-in-graphql