Cannot return null for non-nullable field Message.id.

[brunolm]

I'm calling setMessage trying to return id from the created message. But if there's an error I get the following message:

Cannot return null for non-nullable field Message.id.

The only way to avoid this is to change from ID! to ID. Is there anything I can do to get the actual error instead of this?

Request:

POST http://localhost:4000/graphql
Content-Type: application/json
X-REQUEST-TYPE: GraphQL

mutation setMessage {
  setMessage(input: { message: "a@@gmail.com"}) {
    error
    message
    id
  }
}

resolver

import * as yup from 'yup'

export const messageMutations = {
  setMessage: {
    validationSchema: yup.object().shape({
      input: yup.object().shape({ message: yup.string().email() }),
    }),

    resolve(_, { input }) {
      return { id: (Math.random() * 100) | 0, message: input.message }
    },
  },
}

[maticzav]

@brunolm I am not sure I understand how graphql-middleware fits in here. Is it possible that the yup validation function returns something other than an error?