UntypedNode result is generated from action that returns array of arrays

[draw13]

Hi everyone!
I'm trying to generate api client from the following action:

    [HttpGet("models")]
    public Task<Model[][]> GetModelsAsync(
        [FromServices] IModelsService service,
        CancellationToken cancellationToken)
        => service.GetModelsAsync(cancellationToken);

openapi schema:

"200": {
      "description": "OK",
      "content": {
        "application/json": {
          "schema": {
            "type": "array",
            "items": {
              "type": "array",
              "items": {
                "$ref": "#/components/schemas/Model"
              }
            }
          }
        }
      }
    }

"schemas": {
  "Model": {
    "type": "object",
    "properties": {
      "id": {
        "type": "integer",
        "format": "int32"
      },
      "text": {
        "type": "string",
        "nullable": true
      },
    },
    "additionalProperties": false
  }
}

output:

        public async Task<UntypedNode> GetAsync(...)
        {
            var requestInfo = ToGetRequestInformation(requestConfiguration);
            var errorMapping = new Dictionary<string, ParsableFactory<IParsable>>
            {
                { "401", global::Models.ApiError.CreateFromDiscriminatorValue },
                { "403", global::Models.ApiError.CreateFromDiscriminatorValue },
                { "404", global::Models.ApiError.CreateFromDiscriminatorValue },
                { "500", global::Models.ApiError.CreateFromDiscriminatorValue },
            };
            return await RequestAdapter.SendAsync<UntypedNode>(requestInfo, UntypedNode.CreateFromDiscriminatorValue, errorMapping, cancellationToken).ConfigureAwait(false);
        }

Why UntypedNode is generated for this case? Is there is a way how to fix it?

Thanks.

[baywet]

Hi @draw13
Thanks for using kiota and for reaching out.
This is expected behaviour. While designing kiota we restricted the generated types to: object, scalars, arrays of objects (one dimension), arrays of scalars (one dimension) recursively.
The reason why we have this restriction in place is because supporting generation for more advanced cases would complexify the code generation quite a lot, and from looking at existing descriptions out there, it wasn't that common.
Let us know if you have further questions.

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