firebase - 在 Firebase 中，push 和 childByAutoId 有什么区别

Question

在 Firebase 中，如果我想创建具有唯一 ID 的子节点，我有两个选择:

推():

Use the push() method to append data to a list in multiuser applications. The push() method generates a unique ID every time a new child is added to the specified Firebase reference. By using these auto-generated keys for each new element in the list, several clients can add children to the same location at the same time without write conflicts. The unique ID generated by push() is based on a timestamp, so list items are automatically ordered chronologically.

childByAutoId:

childByAutoId generates a new child location using a unique key and returns a FIRDatabaseReference to it. This is useful when the children of a Firebase Database location represent a list of items. The unique key generated by childByAutoId: is prefixed with a client-generated timestamp so that the resulting list will be chronologically-sorted.

有什么区别？

Answer 1

没关系，看起来它们是相同的，只是它们迎合不同的平台:

Save Data on IOS

childByAutoId : Add to a list of data. Every time you call childByAutoId, Firebase generates a unique ID, such as user-posts/<user-id>/<unique-post-id>.

Save Data on Web

push() : Add to a list of data. Every time you call push(), Firebase generates a unique ID, such as user-posts/<user-id>/<unique-post-id>.