Wrong serializer used if array of string uses enum

[fredmaggiowski]

Hello, we are facing a problem with an API that holds an array of strings which has specific allowed values defined by enum.

Such array is being transformed to a comma separated list rather than having a proper JSON serialization.

Portion of the JSON Schema we are using

  "requestBody": {
        "content": {
            "application/json": {
                "schema": {
                    "additionalProperties": false,
                    "properties": {
                        "contexts": {
                            "items": {
                                "enum": [
                                    "company",
                                    "project"
                                ],
                                "type": "string"
                            },
                            "type": "array"
                        },

This JSON schema is correctly interpreted by Swagger UI

However when serializing the payload we get this result:

{
    contexts: 'company, project',
    name: 'extension name'
}

I've reproduced this issue in a test I have in my project where I'm intercepting the request produced by the generated client:

After doing a bit of reverse engineering I've found this line that may be the culprint

As far as I understood, here the contexts field is being registered as an enum rather than an CollectionOfObjects and I think may be the cause of the serialization issue.

By updating the OAS definition not to use the enum there is a visible change to the above row: https://github.com/mia-platform/console-sdk/pull/186/files#diff-edaa8455836441c91748a0db0ddb0ae4d819148908dd0da2de5b92c60de36d5aR378

see https://github.com/mia-platform/console-sdk/pull/186

- if(extensionsPutRequestBody.contexts)
-    writer.writeEnumValue<ExtensionsPutRequestBody_contexts>("contexts", ...extensionsPutRequestBody.contexts);
+writer.writeCollectionOfPrimitiveValues<string>("contexts", extensionsPutRequestBody.contexts);

Does this make sense, do you have any insights of something I may overlook?

Thanks

[baywet]

Hi @fredmaggiowski, Thanks for using kiota and for reaching out. I believe your analysis is correct, and the code generation is not doing what it's supposed to be doing here. I think the idea of csv is for when an enum is flaggable instead of just being a collection. This is the section of code that'd need to be updated in the generator Is this something you'd like to look into and submit a pull request for?

[fredmaggiowski]

Hi, thanks for your reply!

I've tried looking into it yesterday but didn't manage to find enough time to properly study the repo and create a valid test case to replicate the issue in a test 😞

[baywet]

Thanks for looking into it. Do you have any specific question that could help bootstrap your work?

[fredmaggiowski]

Hi, I haven't got much time to work this last week; I've briefly read the tests of the class you linked me but couldn't figure out the proper way to fit my use case in them.

I've planned to work on this by the end of the week.

[rners01]

@fredmaggiowski @baywet Hey, I've the same issue, was it fixed?

[fredmaggiowski]

Hi @rners01, unfortunately I couldn't find some time to put on the issue yet :(

[baywet]

@rners01 do you want to try submitting a pull request for this?

[rners01]

Hey @baywet, okay, can you give some tips?

[baywet]

@rners01

This is the section of code that'd need to be updated in the generator

You can add unit tests here (duplicate the existing, tweak the setup, tweak the assertions)

Let us know if you have any additional comments or questions.

[rners01]

Hey @baywet , I'm trying to add some test but the C# enum is not treated as one then in WritePropertySerializer

debug example with existing WritesConstructorWithEnumValue test

[baywet]

Hi @rners01 Thank you for the additional information. I'm having difficulties following the issue here. Can you open a draft PR so we can see the changes and help you better please?

[Kindest13]

@baywet created https://github.com/microsoft/kiota/pull/5309