核心数据 - 为什么不自动设置逆关系? [英] Core Data - Why isn't inverse relationship set automatically?
问题描述
我在 NSManagedObject
上的 NSOrderedSet
有一对多的关系。
I have a a one-to-many relationship as an NSOrderedSet
on an NSManagedObject
.
当对有序集合调用 addObject:
方法时(我从 NSManagedObjectModel
子类对象),但是,不会自动设置逆关系。什么原因可能导致这种情况?
When the addObject:
method is called on the ordered set (which I'm calling from a property on an NSManagedObjectModel
subclass object), however, the inverse relationship is not being set automatically. What can cause this?
作为相关的注意事项,我使用神奇记录更容易将数据映射到 NSManagedObject
对象。
As a related note, I am using Magical Record to make it easier to map data to the NSManagedObject
objects.
此外,我也引用了这篇文章,但我不会覆盖我的子类中的这些方法:
Further, I've also referred to this post, but I'm not overriding these methods on my subclass:
推荐答案
NSOrderedSet
有严重错误在核心数据。请参阅这篇文章,了解目前如何解决这些问题:
NSOrderedSet
has serious bugs in Core Data. See this post on ways to get around them for the time being:
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