OpenAPITools / OpenAPITools/openapi-generator

[BUG] Issue with zeroBasedEnums option in OpenAPI Generator

Open
#16,894 2 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Issue: Bug
Dominant language
Java
Stars
26.8k
Forks
7.7k
PR merge metrics
PR metrics pending

Description

Hello,

I am currently working with OpenAPI Generator to generate a C# SDK for my API. I'm facing an issue with the zeroBasedEnums option. According to the documentation, setting this option to true should make enums start with 0, but it doesn't seem to be working as expected.

Here's the relevant part of my configuration file:

{
    "zeroBasedEnums": true
}

Despite setting zeroBasedEnums to true, the generated enums still start with 1. I have searched through the documentation and forums, but I couldn't find a solution. Is there something I might be missing or is this a known issue with OpenAPI Generator?

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 reproducing C# SDK generation with the configuration setting zeroBasedEnums to true, then trace where that option is handled and compare the generated enum values with the expected numbering. Done means the option consistently produces enums starting at 0, with coverage for the reported configuration.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp, java, openapi
Domain
tooling
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.