OpenAPITools / OpenAPITools/openapi-generator

[BUG] [Kotlin] A schema with two arrays of same type generate wrong code

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Issue: Bug
Dominant language
Java
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Description

Bug Report Checklist
  • Have you provided a full/minimal spec to reproduce the issue?
  • Have you validated the input using an OpenAPI validator?
  • Have you tested with the latest master to confirm the issue still exists?
  • Have you searched for related issues/PRs?
  • What's the actual output vs expected output?
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Description

I'm trying to generate a code that has two arrays and both of them has the same type.
But instead both of them being generated as arrays the second one is an object Any

data class Boxes (

    @field:JsonProperty("firstBox")
    val firstBox: kotlin.collections.List<kotlin.String>? = null,

    @field:JsonProperty("secondBox")
    val secondBox: kotlin.Any? = null

)
openapi-generator version

7.4.0

OpenAPI declaration file content or url
{
  "openapi": "3.1.0",
  "info": {
    "contact": {
      "email": "",
      "name": "",
      "url": ""
    },
    "title": "Two arrays same type",
    "version": "1.0"
  },
  "components": {
    "schemas": {
      "Size": {
        "type": "string",
        "enum": [
          "SMALL",
          "MEDIUM",
          "LARGE",
          "EXTRA_LARGE"
        ]
      },
      "Boxes": {
        "properties": {
          "firstBox": {
            "type": "array",
            "items": {
              "$ref": "#/components/schemas/Size"
            }
          },
          "secondBox": {
            "type": "array",
            "items": {
              "$ref": "#/components/schemas/Size"
            }
          }
        }
      }
    }
  }
}

Generation Details
Steps to reproduce
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First steps

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  4. Open a pull request that references the issue number.

Research direction

No repository file, test, or generation command is named. Start by reproducing the issue with the supplied OpenAPI 3.1 schema using the Kotlin generator, then locate the generator logic and tests covering array properties. Done means both firstBox and secondBox are generated as lists of Size rather than the second property becoming Any.

Written by the indexing model from the issue text.

Assessment

Tech stack
kotlin
Domain
tooling
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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