Building SDK fails with "error generating the SDK: Value cannot be null. (Parameter 'key')"

[henriksen]

Current result

Using the OpenAPI file https://api.swaggerhub.com/apis/Skatteetaten_FREG/Lesemodell-uten-taushetsbelagt/1.5, generating the SDK using this command:

Kiota -d "https://api.swaggerhub.com/apis/Skatteetaten_FREG/Lesemodell-uten-taushetsbelagt/1.5" -l CSharp -c FReg -n Skatteetaten -o ./Client --ll debug

it fails with the end message being error generating the SDK: Value cannot be null. (Parameter 'key')

This message is neither helpful nor actionable. There is nothing called key in the OpenAPI file, so I'm assuming it's something internal i Kiota.

The OpenAPI file validates using an online validator.
The OpenAPI file is also available at SwaggerHub.

Expected result:

Client SDK was generated

Full debug output:

dbug: Kiota.Builder.KiotaBuilder[0]
      step 1 - reading the stream - took 00:00:01.0605268
dbug: Kiota.Builder.KiotaBuilder[0]
      step 2 - parsing the document - took 00:00:00.2659796
dbug: Kiota.Builder.KiotaBuilder[0]
      step 3 - create uri space - took 00:00:00.0021657
warn: Kiota.Builder.KiotaBuilder[0]
      could not find operation return type Get \privat\v1\hendelser\feedxsd
warn: Kiota.Builder.KiotaBuilder[0]
      could not find operation return type Get \presse\v1\hendelser\feedxsd
warn: Kiota.Builder.KiotaBuilder[0]
      could not find operation return type Get \presse\v1\personer\xsd
warn: Kiota.Builder.KiotaBuilder[0]
      could not find operation return type Get \privatutenhjemmel\v1\hendelser\feedxsd
warn: Kiota.Builder.KiotaBuilder[0]
      could not find operation return type Get \privat\v1\personer\xsd
warn: Kiota.Builder.KiotaBuilder[0]
      could not find operation return type Get \privatutenhjemmel\v1\personer\xsd
dbug: Kiota.Builder.KiotaBuilder[0]
      CreateRequestBuilderClass 00:00:00.1049891
warn: Kiota.Builder.KiotaBuilder[0]
      Type with empty name and parent Get
warn: Kiota.Builder.KiotaBuilder[0]
      Type with empty name and parent Get
warn: Kiota.Builder.KiotaBuilder[0]
      Type with empty name and parent tilleggsinformasjon
warn: Kiota.Builder.KiotaBuilder[0]
      Type with empty name and parent Get
dbug: Kiota.Builder.KiotaBuilder[0]
      MapTypeDefinitions 00:00:00.0217443
dbug: Kiota.Builder.KiotaBuilder[0]
      step 4 - create source model - took 00:00:00.1272016
crit: Kiota.Builder.KiotaBuilder[0]
      error generating the SDK: Value cannot be null. (Parameter 'key')

Any suggestions? Is the OpenAPI file the problem?

[baywet]

Hi @henriksen
Thanks for trying out Kiota and for reporting this issue.
The description you're using seems correct, after investigating the issue further I was able to identify a few shortcomings in the code base for some edge cases. I've authored #1441 to fix those issues.
It'll most likely be released with the next Kiota release this Friday, but in the meantime you can always checkout that branch locally and build a local version of Kiota to generate your client (with those fixes I was able to get a dotnet client that builds).
Don't hesitate to open other issues if you run into other things!

[henriksen]

Ah, sweet! Super quick response, thank you! I'll check out the branch.