ios - Relationship to self in Core Data

Question

I want to create friends list in my core Data. I have entity User with relationship friends. My user have attributes (to simplify):

• userId
• name

I want that he can make friends so i add this relationship:

All friends of course will be have the same pair of attribute.

So when i look into graph i see something like this:

This is correct ? Can i managed it like separate entity? Will creating a new friend create a new user? What is keyword for apple documentation to find an example or description of this behavior?

Answer 1

关系是绝对正确的，只是友谊自然是双向的，所以反向关系也是朋友。没有创建朋友这样的问题，因此它不会创建新用户。您可以在两个现有用户之间建立友谊关系。您正在寻找的关键字是：核心数据编程指南 :)