本文介绍了MongoDB DBRef ON DELETE CASCADE的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
有没有办法在MongoDB中有一个具有ON DELETE CASCADE功能的外键？
我知道你可以使用DBRef作为一种外键但是当引用指向的集合中的项被移除时，引用返回null。但是我希望参考所属的项目被删除。
或者我需要每次删除的东西检查引用它？
解决方案
现在这个功能不存在。如果你想要的话。在MongoDB Bugtracker上添加它
Is there a way in MongoDB to have a foreign key with a 'ON DELETE CASCADE' functionality?
I know you can use DBRef as a sort of foreign key but when the item in a collection where the reference points to is removed, the reference returns null. But i want that the item where the reference belongs to gets removed. How do i do this?
Or do i need every time i remove things check references to it?
解决方案
This feature doesn't exist now. If you want it. Add it on MongoDB Bugtracker
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