flutter firebase如何获取节点的所有子节点

import 'package:firebase_database/firebase_database.dart';

final DatabaseReference _database = FirebaseDatabase.instance.reference();

void getAllChildren(String nodePath) {
  _database.child(nodePath).once().then((DataSnapshot snapshot) {
    print("Data: ${snapshot.value}");
    // 这里需要递归处理snapshot中的每个子节点
    snapshot.value.forEach((key, value) {
      if (value is Map) {
        getAllChildren('$nodePath/$key');
      }
    });
  });
}

import 'package:cloud_firestore/cloud_firestore.dart';

final Firestore _firestore = FirebaseFirestore.instance;

Future<void> getAllChildren(String collectionPath) async {
  QuerySnapshot querySnapshot = await _firestore.collection(collectionPath).get();

  querySnapshot.docs.forEach((doc) {
    print("Document data: ${doc.data()}");
    // 如果文档中有子集合，可以递归调用getAllChildren
    if (doc.data().containsKey('children')) {
      getAllChildren('${collectionPath}/${doc.id}');
    }
  });
}