OpenAPITools / OpenAPITools/openapi-generator

[BUG] C# problems with polymorphism

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Issue: Bug
Dominant language
Java
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Description

Bug Report Checklist

Generated library is not valid, no problem with swagger codegen 3.0.19

Description

The client generated is not valid

openapi-generator version

Version 4.3.1

OpenAPI declaration file content or url

https://gist.github.com/biasc/ba3adc2d15d4826ff5afd74791dd8ccc

Command line used for generation

java -jar "%Folder%openapi-generator-cli-4.3.1.jar" generate -i http://localhost/DemoApi/swagger/v1/swagger.json -g csharp-netcore -o "%Folder%Generated"

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reviewing the OpenAPI declaration in the linked gist and reproducing the csharp-netcore generation command with openapi-generator 4.3.1. Inspect the generated C# client for the invalid polymorphism output and compare it with generation using 3.0.19. Done means the declaration produces a valid C# client.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp, java
Domain
api, tooling
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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