Python Flask apps do not include Error-based models

[tschaffter]

Taking the example of the Date Annotator API, possible responses include 500 - BadRequest. The official NLP Sandbox schemas is correct has shown below:

But the openapi.yaml generated for Python-Flask apps by openapi-generator convert the BadRequest schema, for example, to its base class, Error. Yet the description of the error come from BadRequest, for example.

  /textDateAnnotations:
    post:
      description: Return the date annotations found in a clinical note
      operationId: create_text_date_annotations
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TextDateAnnotationRequest'
      responses:
        "200":
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TextDateAnnotationResponse'
          description: Success
        "400":
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Invalid request
        "500":
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: The request cannot be fulfilled due to an unexpected server
            error