[BUG] Gradle plugin produces uncompilable code for GitHub definition file.

[sleekweasel]

Bug Report Checklist

• [yes] Have you provided a full/minimal spec to reproduce the issue?
• [ think so ] Have you validated the input using an OpenAPI validator (example)?

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I tried this validator with this cut-down schema and it looked like it was happy, but I'm not an expert.

• [yes ] Have you tested with the latest master to confirm the issue still exists?
• [ yes ] Have you searched for related issues/PRs?
• [ yes ] What's the actual output vs expected output?

Expected: There should be some fields in all kotlin data classes.
Actual: None

Description

Generating the GitHub API schema for Kotlin results in a data class without fields, which doesn't compile. I've extracted and pared down a single endpoint in the gist.

In data.class.mustache, allVars is empty, even though hasVars is true and nonNullableVars, optionalVars, and readWriteVars all contain (in the example Gist) reviewers and teamReviewers.

openapi-generator version

My target version is 7.12.0 but it happens with :latest too, see above.

OpenAPI declaration file content or url

https://gist.githubusercontent.com/sleekweasel/bd91330c7c437d1641a52761d18d8d60/raw/a9fcef66c20938b762944f3d938cbcee1f483fc5/api.chopped.json

Generation Details

$ curl -o https://gist.githubusercontent.com/sleekweasel/bd91330c7c437d1641a52761d18d8d60/raw/a9fcef66c20938b762944f3d938cbcee1f483fc5/api.chopped.json

$ docker run -v $PWD:$PWD  openapitools/openapi-generator-cli:v7.12.0  generate -i api.chopped.json -g kotlin  -o $PWD

$ grep -A2 data src/main/kotlin/org/openapitools/client/models/PullsRequestReviewersRequest.kt
data class PullsRequestReviewersRequest (

) {

Steps to reproduce

See above. There are no entries in data class, which means it won't compile.

Related issues/PRs

Suggest a fix