code: def validate_q_time(self, value):
          
          if value:
              try:
                  range = utils.parse_datetime_range_to_solr(value)
                  return range
              except Exception as e:
                  raise serializers.ValidationError(e.message)
  
          return value
docs: Would be for example: [2013-03-01 TO 2013-04-01T00:00:00] and/or [* TO *]
          Returns a valid sorl value. [2013-03-01T00:00:00Z TO 2013-04-01T00:00:00Z] and/or [* TO *]