EF4 - CTP4 CodeOnly [英] EF4 - CTP4 CodeOnly

问题描述

你好 - 是否可以删除或绕过级联删除 默认？

hello - Is possible to remove or circumvent the cascading delete default ?

 

推荐答案

您可以使用Fluent API定义关系，然后允许您明确设置级联删除行为。 例如：

You can use the fluent API to define the relationship which then allows you to explicitly set the cascade delete behavior.  For example:

modelBuilder.Entity<

modelBuilder.Entity<

 

驱动程序 >（）。HasRequired（d
=> d.Team） .WithMany（t => t.Drivers）.WillCascadeOnDelete（ true ）;

Driver>().HasRequired(d => d.Team).WithMany(t => t.Drivers).WillCascadeOnDelete(true);

请注意，级联删除仅在某些情况下按惯例设置。 最有用的是如果您的FK可以为空，那么对于FK关系，您（通常）不会按惯例进行级联删除。

Note that cascade delete is only set by convention in certain cases.  The most useful one is that for FK relationships, you (usually) won't get cascade delete by convention if your FK is nullable.

目前无法使用属性更改级联行为。

It currently isn't possible to change the cascade behavior using an attribute.

谢谢，

亚瑟

Thanks,
Arthur

 

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