如何设置Firebase实时数据库的双重查询? [英] How do i set double query of Firebase Realtime Database?

问题描述

从下面的查询中，我按 timestamp

From below query I get the data in order of timestamp

Query Users = FirebaseDatabase.getInstance.getReference.child("Users").orderbychild("timestamp");

现在所有孩子都按时间排序.但是如何通过 CurrentUserId 过滤此查询?

Now all children are ordered by time. But how do I filter this query by CurrentUserId?

Query CurrentUser = Users.orderbychild("CurrentUserId");

推荐答案

Firebase不支持多个 orderbychild 方法.您可以做的是，首先使用当前用户ID

Firebase does not support multiple orderbychild method. What you can do is, first fetch records from Firebase with current user id

Query Users = FirebaseDatabase.getInstance.getReference.child("Users").orderbychild("CurrentUserId");

然后在客户端进行时间戳排序.

Then do timestamp sorting at client end.

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