Content-type for POST endpoints with multipart/form-data does not work since v2.4.0

[Max Dobler]

Describe the bug

Sind version 2.4.0 POST Endpoints with content-type multipart/form-data are not generated properly in open api spec. This leads to missing content-type in swagger ui webpage.

To Reproduce
Steps to reproduce the behavior:

• What version of spring-boot you are using?
  3.3.0

• What modules and versions of springdoc-openapi are you using?
  springdoc-openapi-starter-webmvc-ui:2.4.0

• What is the actual and the expected result using OpenAPI Description (yml or json)?

• Provide with a sample code (HelloController) or Test that reproduces the problem
  POST Endpoint which accepts multipart/form-data. Use [sprin](springdoc-openapi-starter-webmvc-ui in version 2.4.0 or 2.5.0
@PostMapping(produces = APPLICATION_JSON_VALUE, consumes = MULTIPART_FORM_DATA_VALUE)

Go to swagger-ui webpage and the content-type is missing for the POST Endpoint.

Expected behavior

Adds content-type multipart/form-data to POST Endpoints in OpenApi docs

Screenshots
Open Api Diff:

Swagger UI in v2.3.0

Swagger UI in 2.4.0 / 2.5.0

Additional context

[Badr NASS LAHSEN]

Not reproducible.
Feel free to provide a Minimal, Reproducible Example - with HelloController that reproduces the problem.

This ticket will be closed, but can be reopened if your provide the reproducible sample.

[Max Dobler]

I created an example to reproduce the bug: https://github.com/maxdobler/springdoc-example

I noticed that it makes a difference if the UploadDto has the @Valid annotation. With the annotation, the swagger-ui displays the dropdown an displayes the right content-type.

If you change the springdoc version to 2.5.0 the consuming content-type is not displayed in the swagger-ui.

Please reopen this issue.

[Max Dobler]

@bnasslahsen Please reopen this issue

[Badr NASS LAHSEN]

@maxdobler,

This behavior was a bug in previous versions. In version 2.5.0, the workaround is to explicitly declare @RequestBody.

  @Operation(summary = "Upload new content", description = "Upload test content")
  @PostMapping(produces = APPLICATION_JSON_VALUE, consumes = MULTIPART_FORM_DATA_VALUE)
  HelloDto uploadContent(@RequestBody HelloUploadDto contentUploadDto) throws IOException;

[Max Dobler]

Oh I see, thank you for the fast Feedback. It now works with @RequestBody. 👍