Kotlin SDK: all_projects() fails with 'Cannot deserialize value of type `com.looker.sdk.GitApplicationServerHttpScheme`'

With the latest Kotlin sources, running against Looker 21.0.34.

1. I created a blank project via the Web UI, and configured it to point to a Custom Git Repository (CodeCommit).
2. After it’s created successfully, using the Kotlin SDK, I call update_session() to set the session and then all_projects() but it fails with:

Calling update_session(): body=WriteApiSession(workspace_id=dev)
Response: ApiSession(can={view=true, update=true}, workspace_id=dev, sudo_user_id=null)
Calling all_projects()
Response: SDKErrorResponse(value=GET /projects com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `com.looker.sdk.GitApplicationServerHttpScheme` from String "": not one of the values accepted for Enum class: [http, https]
 at [Source: (String)"[{"id":"reports","name":"reports","git_remote_url":"https://...,"git_username":"...",""[truncated 625 chars]; line: 1, column: 372] (through reference chain: java.lang.Object[][0]->com.looker.sdk.Project["git_application_server_http_scheme"]))
...
	at com.looker.rtl.APIMethods.ok(APIMethods.kt:38) ~[kotlin-sdk-4.0.0.2.jar:na]

This worked until recently - I just updated to get the latest fix in 544.

sdk.update_project() is now also failing with a 422 and perhaps it’s the same issue. Without being able to get projects, not clear how to debug further

[jkaster]

So glad you have a work-around!

FWIW I’ve removed that enum constraint for future Looker releases (because the spec doesn’t match reality) so the Kotlin SDK will be happy when we regenerate it after the API spec is updated. It will be a nullable string instead of an enum then.

Normally, we want more in our spec for clarity and integrity, but only if the enum is always guaranteed to have an established value. You receiving "" when I receive null in my tests still puzzles me, though. I haven’t figured out the circumstance that causes it.

And, now I won’t have to. 😉

[frankspeak]

@jkaster , thank you for the suggestion - will give it a try tomorrow.