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• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
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Description

When oneOf or anyOf constructs are used, the generated model file has duplicate constructor and duplicate getObject() method. There's no reference to the actual properties (aId, bId, cId, dId) in the generated file. These problems are not seen with allOf. The attached example YAML file uses oneOf. The same problem will be observed if it's replaced with anyOf.

With aspnetcore, the model file has no duplicates but shows other problems, such as no constructor. This issue focuses only on csharp-netcore.

openapi-generator version

Version used is 6.2.1. Did not test against the latest commit on the master branch.

OpenAPI declaration file content or url

openapi: 3.0.0
info:
  version: '1.0.0'
  title: 'Problem example with OneOf'
paths: {}
components:
  schemas:
    SomeId:
      type: object
      properties:
        aId:
          $ref: '#/components/schemas/AId'
        bId:
          $ref: '#/components/schemas/BId'
        cId:
          $ref: '#/components/schemas/CId'
        dId:
          $ref: '#/components/schemas/DId'
      oneOf:
        - required: [ aId ]
        - required: [ bId ]
        - required: [ cId ]
    AId:
      type: integer
      minimum: 0
      maximum: 10
    BId:
      type: integer
    CId:
      type: integer
    DId:
      type: integer

Generation Details

java -jar C:\openapi-generator-cli.jar generate  -i C:\ModelExample.yaml -g csharp-netcore -o C:\out --additional-properties=targetFramework=net6.0  --additional-properties=packageName=Com.Example

Steps to reproduce

Just run the command above and check the generated model file. We will see the duplicates.

Related issues/PRs

This could be related: #8382

Suggest a fix

None at the moment