docs: def resolwe_exception_handler(exc, context):
      """Handle exceptions raised in API and make them nicer.
  
      To enable this, you have to add it to the settings:
  
          .. code:: python
  
              REST_FRAMEWORK = {
                  'EXCEPTION_HANDLER': 'resolwe.flow.utils.exceptions.resolwe_exception_handler',
              }
  
      """
      response = exception_handler(exc, context)
  
      if isinstance(exc, ValidationError):
          if response is None:
              response = Response({})
          response.status_code = 400
          response.data['error'] = exc.message
  
      return response