Question

我想知道如何在python中安全地参数化动态mysql查询。通过动态，我的意思是它会根据if语句的评估方式而改变。

我理解如何在python中使用逗号而不是百分号来参数化mysql查询，如下所示。

c.execute("SELECT * FROM foo WHERE bar = %s AND baz = %s", (param1, param2))

以下是动态查询的示例＆＃39;。我希望找到比使用百分号更安全的方法。

    def queryPhotos(self, added_from, added, added_to):
       sql = "select * from photos where 1=1 "
       if added_from is not None:
           sql = sql + "and added >= '%s' " % added_from
       if added is not None:
           sql = sql + "and added = '%s' " % added
       if added_to is not None:
           sql = sql + "and added <= '%s' " % added_to

感谢您的见解。

Answer 1

感谢@Nullman我得到了答案。

    def queryPhotos(self, added_from, added, added_to):
       vars = []

       sql = "select * from photos where 1=1 "
       if added_from is not None:
          sql = sql + "and added >= %s "
          vars.append(added_from)
       if added is not None:
          sql = sql + "and added = %s "
          vars.append(added)
       if added_to is not None:
          sql = sql + "and added <= %s "
          vars.append(added_to)

       vars = tuple(vars)

       results = c.execute(sql, vars)

如何安全地参数化动态python mysql查询？

1 个答案: