Question: additionalTypeDefs and additionalResolvers

[ducthang-vu]

I've recently start using Mesh and I think it's great.

I'd like to ask a (noob) question about an issue I have with adding additional resolvers that I am not able to figure out.

I'm using the OpenAPI / Swagger handler to generate a GraphQL interface from a remote source (only one source).

The handler generates the followin types and queries (simplified example):

type Owner {
    name: String!
}

type Car {
    id: String!
}

type CarResponse {
    items: [Car]
    totalCount: Int
}

carGet(
    ownerName: String
): CarResponse

Notice that carGet returns all cars in db if no userName is given, otherwise returns all car of the particular owner.

I did the following in the .meshrc.yaml file:

additionalTypeDefs : |
  extend type Owner {
    cars: CarResponse
  }

additionalResolvers :
  - type : Owner
    field : cars
    targetSource : SOURCE
    targetMethod : carGet
    args :
      ownerName : "{root.name}"

It works.

I then tried the following:

additionalTypeDefs : |
  extend type Owner {
    cars: [Car]
  }

additionalResolvers :
  - type : Owner
    field : cars
    targetSource : SOURCE
    targetMethod : carGet
    returnData: items
    args :
      ownerName : "{root.name}"

The last attempt fails, and the cars field always return null, without any error notification.
I tried to add the resolver with a js code, and the it turns out that the following error is raised:

TypeError: Cannot read property 'prev' of undefined
    at getIdentifierRecursive (...\node_modules\@graphql-mesh\openapi\index.cjs.js:1927:24)
    at getParentIdentifier  (...\node_modules\@graphql-mesh\openapi\index.cjs.js:1921:12)
    ...\node_modules\@graphql-mesh\openapi\index.cjs.js:1211:38
    ...\node_modules\@graphql-mesh\openapi\index.cjs.js:4886:61
    at resolveField (...\node_modules\graphql\execution\execute.js:466:18)
    at executeFields (...\node_modules\graphql\execution\execute.js:294:18)
    at executeOperation (...\node_modules\graphql\execution\execute.js:238:122)
    at executeImpl (...\node_modules\graphql\execution\execute.js:118:14)
    at Object.execute (...\node_modules\graphql\execution\execute.js:62:35)
    at ...\node_modules\@graphql-tools\delegate\index.cjs.js:1717:65 {

It seems that the issue is with the info object that is passed to the resolver, where info.path.prev is "undefined".

I'd like understand if my attempt is sound, and if so how can I correct the error.