How do you use extend to transform a field name?

[webdevike]

Hello I am hitting a rest api that uses a convention called "Badgerfish". The response looks something like this { "alice": { "bob" : { "$": "charlie" }, "david": { "$": "edgar"} } }. Notice how some of the keys are "$". This will fail because GraphQL doesn't allow $ to be a field.

"properties": {
     "$": { <--- this will fail
       "type": "string" 
     }
 }

So In order to hit this api and resolve the $ I need to use the extend transform.

This is what my meshrc.yml looks like but when I run this mesh will throw an error saying Foo is undefined. Where is Foo supposed to be defined?

transforms:
  - extend: |
      extend type Foo {
          dollarSign: String!
      }
additionalResolvers:
  - ./src/modules/datasource/resolvers.js

[ardatan]

I think Foo is an example there :) Foo should be replaced with the type name having $.

[webdevike]

I realized that! haha but even still. I have this.So as you can see the field is pretty deeply nested. When I run this graphql mesh throws an error saying "Cannot extend type "OrganizationName" because it is not defined."

sources:
  - name: API
    handler:
      jsonSchema:
        baseUrl: api
        operationHeaders:
          Authorization: 'string'
        operations:
          - type: Query
            field: results
            path: /path
            method: GET
            responseSchema: ./json-schemas/dnb.json
transforms:
  - extend: |
      extend type OrganizationName {
          dollarSign: String!
      }
additionalResolvers:
  - ./resolvers.js

"properties": {
    "FindCompanyResponse": {
      "type": "object",
      "properties": {
        "FindCompanyResponseDetail": {
          "type": "object",
          "properties": {
            "CandidateMatchedQuantity": {
              "type": "integer"
            },
            "FindCandidate": {
              "type": "array",
              "items": {
                "type": "object",
                "properties": {
                  "Testing": {
                    "type": "string"
                  },
                  "OrganizationPrimaryName": {
                    "type": "object",
                    "properties": {
                      "OrganizationName": {
                        "type": "object",
                        "properties": {
                          "dollarSign": {<--- where the transform would happen
                            "type": "string"
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}

[ardatan]

Actually we are not doing any transform in returned data. The idea is to add an extra GraphQL field without touching the remote schema and resolve that field in an additional resolver.
If you share a CodeSandbox reproduction, I can help you better.

[webdevike]

Ahh I see now. That's interesting. So I would just drill down manually through the api to return that value. It would be really nice if I could tap into a field and transform the returned data. Maybe you don't allow this intentionally.

[ardatan]

We don't do that specifically because GraphQL does that naturally.