扑火基地如何获取节点的所有子节点 [英] flutter firebase how do I get all the children of a node

问题描述

我对使用dart和firebase不太熟悉，我想知道如何获取某个节点的所有子节点，以及如何检查节点是否存在

I am not very familiar with using dart and firebase and I was wondering how I could get all the children of a certain node and how I could check if a node exists

推荐答案

类似的操作应该可以获取用户列表:

Something like this should you get the list of users:

static Future<int> getUserAmount() async {
  final response = await FirebaseDatabase.instance
      .reference()
      .child("Users")
      .once();
  var users = [];
  reponse.value.forEach((v) => users.add(v));
  print(users);
  return users.length;
}

您可以与 users 一起检查您需要检查的内容，然后返回结果；

You can check with users what you need to check and then return a result;

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