dpl22899 2012-10-01 03:27
浏览 27
已采纳

如何将PDO :: FETCH_CLASS与抽象类一起使用?

Is there a method to instantiate a child class with PDO::FETCH_CLASS based on retrieved data? Suppose that there exists an abstract class A, classes B and C that are implementations of A and a field on my table named classname that will be used to instantiate the right class. Is it possible?

  • 写回答

1条回答 默认 最新

  • douyu0792 2012-10-01 04:43
    关注

    Sounds like you need, PDO::FETCH_CLASSTYPE. From the manual:

    PDO::FETCH_CLASS: returns a new instance of the requested class, mapping the columns of the result set to named properties in the class. If fetch_style includes PDO::FETCH_CLASSTYPE (e.g. PDO::FETCH_CLASS | PDO::FETCH_CLASSTYPE) then the name of the class is determined from a value of the first column.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

报告相同问题?

悬赏问题

  • ¥15 关于#java#的问题:找一份能快速看完mooc视频的代码
  • ¥15 这种微信登录授权 谁可以做啊
  • ¥15 请问我该如何添加自己的数据去运行蚁群算法代码
  • ¥20 用HslCommunication 连接欧姆龙 plc有时会连接失败。报异常为“未知错误”
  • ¥15 网络设备配置与管理这个该怎么弄
  • ¥20 机器学习能否像多层线性模型一样处理嵌套数据
  • ¥20 西门子S7-Graph,S7-300,梯形图
  • ¥50 用易语言http 访问不了网页
  • ¥50 safari浏览器fetch提交数据后数据丢失问题
  • ¥15 matlab不知道怎么改,求解答!!