将[NotMapped]添加到分部类是否可以避免映射整个类？(Does adding [NotMapped] to a partial class avoid mapping the entire c

将[NotMapped]添加到分部类是否可以避免映射整个类？(Does adding [NotMapped] to a partial class avoid mapping the entire class?)

我已经设置了我的EF代码优先数据库，但想要添加其他派生属性。 （是的，它应该在视图模型中，我们可以讨论另一个时间为什么这样。）我创建了一个扩展实际表类的部分类。 如果我将[NotMapped]添加到新的部分，它会避免映射我在那里添加的其他属性还是它将应用于整个类？

I have set up my EF code-first database but want to add additional derived properties. (Yes, it should be in a view model, we can discuss another time why it is this way.) I have created a partial class extending the actual table class. If I add a [NotMapped] to the new partial, will it avoid mapping the additional properties I add there or will it apply to the entire class?

最满意答案

它适用于整个班级。 请记住，部分类只是将类拆分为多个文件的一种方法。 来自官方文档 ：

在编译时，合并部分类型定义的属性。

所以这：

[SomeAttribute] partial class PartialEntity { public string Title { get; set; } } [AnotherAttribute] partial class PartialEntity { public string Name { get; set; } }

相当于写作：

[SomeAttribute] [AnotherAttribute] partial class PartialEntity { public string Title { get; set; } public string Name { get; set; } }

如果要在不具有模型中包含的属性的情况下添加NotMapped类，则需要将NotMapped属性添加到各个项：

partial class PartialEntity { public string Title { get; set; } } partial class PartialEntity { [NotMapped] public string Name { get; set; } }

It will apply to the entire class. Remember that a partial class is simply a way of splitting a class into multiple files. From the official docs:

At compile time, attributes of partial-type definitions are merged.

So this:

[SomeAttribute] partial class PartialEntity { public string Title { get; set; } } [AnotherAttribute] partial class PartialEntity { public string Name { get; set; } }

Is equivalent to writing:

[SomeAttribute] [AnotherAttribute] partial class PartialEntity { public string Title { get; set; } public string Name { get; set; } }

If you want to add a partial class without having the properties included in the model, you will need to add the NotMapped attribute to the individual items:

partial class PartialEntity { public string Title { get; set; } } partial class PartialEntity { [NotMapped] public string Name { get; set; } }