There is an object relational mapper out there that is a hidden gem.
那里有一个对象关系映射程序，它是一块隐藏的宝石。
So now we have both the "mapper" devices for our new system.
现在我们拥有我们的新系统所需的两个“映射”设备了。
With this input, you can now test your mapper script, as shown in Listing 7.
通过单词输入，现在您可以测试您的mapper脚本，如清单7所示。
Thus, I write a new Mapper class.
因此，我编写了一个新的Mapper类。
What's Left of Data Mapper Now?
数据匹配现在还剩下什么？
What's Left of Data Mapper Now?
数据匹配现在还剩下什么？
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