How can you get the types for the resolver arguments in GraphQL?

noheadphones

2 months ago

7

export const CustomResolver = async (obj, args, context, info) => {
  console.log('id received:', args)
  console.log('context', context)
  return {
    result: 'PASS',
  }
}

{ payload }: { payload: typeof ImportedPayload }

• 

  TheFrontend

  3 weeks ago

  @noheadphones would you mind sharing the code of your custom resolver?

• 

  noheadphones

  3 weeks ago

  What exactly are you looking to do? I may be able to provide a better example

• 

  TheFrontend

  3 weeks ago

  Basically I'm just trying to learn how the response object should be formatted or how you enabled types here.

• 

  noheadphones

  3 weeks ago

  Sure, here's an example of a custom query (mutation is pretty much similar)

  
  
  

  payload config, something like this

  
  

  CheckQuizAnswers: CheckQuizAnswers(GraphQL, payload),

  
  

  This is what the function actually is:

  
  

  import { CheckQuizAnswersResolver } from '../resolvers/CheckQuizAnswersResolver'
  import { default as ImportedGraphQL } from 'graphql'
  import { Payload } from 'payload'
  
  export const CheckQuizAnswers = (GraphQL: typeof ImportedGraphQL, payload: Payload) => {
    return {
      args: {
        answers: {
          type: new GraphQL.GraphQLNonNull(new GraphQL.GraphQLList(GraphQL.GraphQLString)),
        },
      },
      resolve: CheckQuizAnswersResolver,
      type: new GraphQL.GraphQLObjectType({
        name: 'result',
        fields: {
          result: {
            type: GraphQL.GraphQLString,
          },
        },
      }),
    }
  }

  
  

  And then your resolver

  CheckQuizAnswersResolver

  is what actually handles the logic, in this function ^^^ type is a return type of a valid GraphQL object, so in this case it's something custom, if I want to return a payload collection though I set the

  type

  to

  payload.collections['articles'].graphQL?.type

  for example. The args then is what arguments you might have for your query or mutation, each arg will need a

  type

  as well: my type here is complex as its a mandatory (nonnull) array (list) of strings

  
  
  

  Finally my resolver function looks a bit like this

  
  
  

  export const CheckQuizAnswersResolver = async (obj, args: ResolverArgs, context, info) => {
    // do some logic here
    return {
      result: result ? 'PASS' : 'FAIL',
    }
  }

  
  

  note that I've manually typed my ResolverArgs, so its a custom type every time, there's no inference right now as far as I can tell, its possible to do it though

  
  

  
  

  Hopefully that makes sense @TheFrontend

• 

  TheFrontend

  3 weeks ago

  Awesome, thanks!