报错OperationalError at /post (1054, "Unknown column '马军' in 'where clause'")

django怎么查询数据中类型是varchar的字段，报错OperationalError at /post (1054, "Unknown column '马军' in 'where clause'")

and Sno = {0} or Sname = '{1}'
字符串查询记得添加引号。