[BUG][KOTLIN-SPRING] Missing Bean Validation annotations on RequestBody

[Fabii547]

Description

The kotlin-spring generator does not add beanValidation annotations (e.g. @Max) for RequestBody params.

openapi-generator version

7.0.1

OpenAPI declaration file content or url

paths:
  /add:
    put:
      requestBody:
        content:
          application/json:
            schema:
              type: integer
              title: quantity
              minimum: 2
        required: true
      responses:
        '204':
          description: OK

generates

@RequestMapping(
           method = [RequestMethod.PUT],
            value = ["/add"],
            produces = ["application/json"],
            consumes = ["application/json"]
    )
    fun add(@Valid @RequestBody body: kotlin.Int): ResponseEntity<Unit>

but should have @Min(2) included:

fun add(@Valid @Min(2) @RequestBody body: kotlin.Int): ResponseEntity<Unit>

Generation Details

Plugin configuration: (beanValidation is enabled by default)

generatorName = 'kotlin-spring'
configOptions = [
interfaceOnly: 'true',
skipDefaultInterface: 'true',
useSpringBoot3: 'true'
]

Steps to reproduce

./gradlew openApiGenerate

Related issues/PRs

The same issue occurred and has been fixed in the java spring generator: #13932

Suggest a fix

Applying the same fix as done in #13932 for the java spring version.

[lukbaran]

Hi, I try to fix it in #16859