[Java/spring] multipart/form-data in requestBody does not generate anything

[melocotton]

Since 3.0.21, code generation for multipart/form-data in requestBody does not generate any @RequestPart input param in the java interface.

    post:
      tags:
        - ads  dataset request
      summary: ...
      description: ...
      operationId: createDatasetRequest
      security:
        - basicAuth: []
      parameters:
        - in: query
          name: scheduling
          schema:
            type: string
            example: '0 8 * * *'
        - in: query
          name: startDate
          schema:
            type: string
            format: date-time
        - in: query
          name: endDate
          schema:
            type: string
            format: date-time
      requestBody:
        content:
          multipart/form-data:
            schema:
              properties:
                file:
                  type: string
                  format: binary
        required: true
      responses:
        '201':
          description: ...
          content:
            text/plain:
              schema:
                type: string
                example: e59f329a-d911-4bd1-89ee-e8e922ca632c
        default:
          description: ...
          content:
            application/problem+json:
              schema:
                $ref: '#/components/schemas/ProblemDTO'

It was working in 3.0.20.

[jjaros]

Hi, it seems like a bug of swagger-codegen-generators (specially in io.swagger.codegen.v3.generators.java.SpringCodegen#addCodegenContentParameters) and it should be fixed in next release - see 873f695#diff-1413e682f4e318f3a61ea2ee5a3dac03d16a276d8a62b701993dfcf31d44da95

Just now, as a simple workaround you can create custom generator that will override SpringCodegen#addCodegenContentParameters and will handle also formParams - e.g. as is in related commit changes.

Cc: @HugoMario