在Firebase(Android)中同时更新多个节点中的多个字段 [英] Update Multiple Fields in Multiple Nodes Simultaneously in Firebase (Android)

问题描述

我正在尝试使用地图"和更新子项"更新不同节点中的多个字段，但是firebase正在删除各个节点中的数据并添加数据.我希望更新数据，并且以前的数据保持不变.有趣的是，该逻辑在更新同一节点中的2个字段时有效，但在引入多个节点时无效.请参见下面的代码.

I am trying to update multiple fields in different nodes using Maps and Update children however firebase is deleting the data in the respective nodes and adding the data. I want the data to be updated and previous data to remain the same. Interestingly the logic works while updating 2 fields in the same node, but not when multiple nodes are introduced. Please see the code below.

我不是要创建新字段，而只是同时更新2个不同节点中的2个现有字段.每个节点都有10个我要保留的不同字段.

I am not trying to create new fields, but merely update 2 existing fields each in 2 different nodes simultaneously. Each nodes has 10 different fields which I want to keep.

我是从viewholder.button内部(在回收器视图适配器中)调用此

I am calling this from inside a viewholder.button (in a recycler view adapter)

String ref1 = "users/" + currentUserId;
String ref2 = "user_detail_profile/" + currentUserId;

HashMap<String, Object> updateFbDb1 = new HashMap<>();
updateFbDb1.put("name", "Albert Einstein");
updateFbDb1.put("score", 23);

HashMap<String, Object> updateFbDb2 = new HashMap<>();
updateFbDb2.put("claps", 55);
updateFbDb2.put("comments", 21);

HashMap<String, Object> updateFbDb3 = new HashMap<>();

updateFbDb3.put(ref1, updateFbDb1);
updateFbDb3.put(ref2, updateFbDb2);

fbDbRefRoot.updateChildren(updateFbDb3);

这是可行的，但我想一次完成，这样就可以完全或不附加成功的侦听器.

HashMap<String, Object> updateFbDb1 = new HashMap<>();
updateFbDb1.put("name", "Albert Einstein");
updateFbDb1.put("score", 23);

HashMap<String, Object> updateFbDb2 = new HashMap<>();
updateFbDb2.put("claps", 55);
updateFbDb2.put("comments", 21);

fbDbRefRoot.child("users").child(currentUserId).updateChildren(updateFbDb1);
fbDbRefRoot.child("user_detail_profile").child(currentUserId).updateChildren(updateFbDb2);

推荐答案

以下解决方案基于@Alex Mamos的建议正在起作用...

The following solution is working based on @Alex Mamos suggestion is working...

Map<String, Object> map = new HashMap<>();
map.put("/users/" + currentUserId + "/name/", "Albert Einstein");
map.put("/users/" + currentUserId + "/score/", 23);
map.put("/user_detail_profile/" + currentUserId + "/claps/", 45);
map.put("/user_detail_profile/" + currentUserId + "/comments/", 8);
fbDbRefRoot.updateChildren(map);

以某种方式无法将地图插入地图.这都必须是大地图的一部分.

Somehow inserting maps inside maps does not work. It all has to be a part of a large map.

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