[BUG] Description

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• 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 am trying to generate the code for an endpoint that can accept json input and a multipart file upload

openapi-generator version

@openapitools/openapi-generator-cli": "^2.13.1"

OpenAPI declaration file content or url

If you post the code inline, please wrap it with

post:
  operationId: letter_create

  summary: create

  description: >-
    Creates a new letter given information

  tags:
    - Letters

  parameters:
    - $ref: "../shared/parameters/idempotency.yml#/idem-header"
    - $ref: "../shared/parameters/file.yml"

  requestBody:
    required: true
    content:
      application/json:
        schema:
          $ref: "models/letter_editable.yml"

      application/x-www-form-urlencoded:
        schema:
          $ref: "models/letter_editable.yml"
        encoding:
          to:
            style: deepObject
            explode: true
          from:
            style: deepObject
            explode: true
          merge_variables:
            style: deepObject
            explode: true
          metadata:
            style: deepObject
            explode: true

      multipart/form-data:
        schema:
          $ref: "models/letter_editable_with_file.yml"
        encoding:
          to:
            style: deepObject
            explode: true
          from:
            style: deepObject
            explode: true
          merge_variables:
            style: deepObject
            explode: true
          metadata:
            style: deepObject
            explode: true
          file:
            style: deepObject
            explode: true

  responses:
    "200":
      $ref: responses/post_letter.yml

    default:
      $ref: "../shared/responses/error_response.yml"

  x-template-config:
    upload_file: true
    test:
      create: true
      tests:
        - subject: regular_200
          success: true
        - subject: certified_200
          success: true
        - subject: registered_200
          success: true
        - subject: 422

(for YAML code) or

Generation Detail

I am generating ruby code for this, but it is only generating code when the request is application/json type not for the multipart one, actually if I put the multipart/form-data: block at the beginning it generates the code I need but now it does not generate the one for the application/json. This is weird because it is valid to have differente contents in the requestBody

this is the configuration I am using

{
  "packageName": "lob",
  "packageUrl": "https://github.com/lob/lob-ruby-sdk",
  "packageVersion": "1.0.0",
  "projectName": "lob-ruby-sdk",
  "withSeparateModelsAndApi": true,
  "developerName": "Lob",
  "developerEmail": "engineering@lob.com",
  "gemName": "lob",
  "hideGenerationTimestamp": true,
  "developerOrganizationUrl": "https://www.lob.com/developers",
  "files": {
    "CODE_SNIPPETS.md.mustache": {
      "destinationFilename": "CODE_SNIPPETS.md"
    }
  }
}

Steps to reproduce

The code generated for us to get this error is the following one https://github.com/lob/lob-ruby/blob/main/lib/lob/api/letters_api.rb#L109 this is the issure reported by one of our customers https://github.com/lob/lob-ruby/issues/211 where he is trying to use the sdk generated

Related issues/PRs

link

Start with the supplied OpenAPI requestBody declaration and the generated Ruby client at lib/lob/api/letters_api.rb#L109. Compare generation when application/json and multipart/form-data appear in different orders, then inspect the Ruby generator's handling of these requestBody content types. Done means the generated client supports both media types for the same endpoint.