code: def get_datasource_info(datasource_id, datasource_type, form_data):
      
      datasource = form_data.get('datasource', '')
      if '__' in datasource:
          datasource_id, datasource_type = datasource.split('__')
          # The case where the datasource has been deleted
          datasource_id = None if datasource_id == 'None' else datasource_id
  
      if not datasource_id:
          raise Exception(
              'The datasource associated with this chart no longer exists')
      datasource_id = int(datasource_id)
      return datasource_id, datasource_type
docs: Compatibility layer for handling of datasource info
  
      datasource_id & datasource_type used to be passed in the URL
      directory, now they should come as part of the form_data,
      This function allows supporting both without duplicating code