Resolving IDs with mutation conventions

[pckv]

Hello!

I'm trying to deserialize an ID in a mutation while using the new UseMutationConvention attribute, but it's not being resolved.

Here is the mutation:

[UseMutationConvention]
public string ReturnId([ID] int id) => id.ToString();

And the result:

{
  "errors": [
    {
      "message": "Unable to convert the value of the argument `id` to `System.Int32`. Check if the requested type is correct or register a custom type converter.",
      "locations": [
        {
          "line": 2,
          "column": 3
        }
      ],
      "path": [
        "returnId"
      ],
      "extensions": {
        "fieldName": "returnId",
        "argumentName": "id",
        "requestedType": "System.Int32"
      }
    }
  ]
}

When I remove the [UseMutationConvention] attribute or create the input manually like shown below it works.

public record ReturnIdInput([property: ID] int id);
public string ReturnId(ReturnIdInput input) => input.id.ToString();

Am I missing something? Looking at the docs for Input and Payload it seems like this should be supported.

Also I want to note how I need to declare the ID as [property: ID] in the record. Before v12 [ID] worked just fine. Is there any reason for this?

[tobias-tengler]

A fix is already in the works in #4639 :)

About the property syntax in records: It's the official way to annotate the resulting properties of these "constructor arguments". The solution of v11 was unmaintainable and led to many bugs, as mentioned in the migration guide.

[pckv]

Ah, fantastic! Thanks a lot :)