是什么导致FIREBASE和FLUTTER发出“权限被拒绝"消息 [英] what causes "permission denied"-message with FIREBASE and FLUTTER

问题描述

我遇到了错误

"W/SyncTree(31625):在/address处侦听失败:DatabaseError:权限被拒绝"

'W/SyncTree(31625): Listen at /address failed: DatabaseError: Permission denied'

，同时使用匿名Firebase用户向Firebase发送请求，并且没有花哨的Firebase数据库规则:). ..我想找出导致此消息的原因.

while sending a request to firebase with an anonymous firebase user and without fancy firebase database rules :) . ..and i want to find out what causes this message.

错误与现有用户相同，这意味着用户登录似乎有效，但无法访问数据库.

error is the same with an existing user, means user signIn seems to work but accessing database not.

我到目前为止所做的事情:

• 设置Firebase(包括添加google_service.json，pubspec.yaml中的依赖项)-到目前为止可以正常运行

• 按以下方式创建登录名(例如Google的示例链接):

Future<String> _testSignInAnonymously() async {
  final FirebaseUser user = await _auth.signInAnonymously();
  assert(user != null);
  assert(user.isAnonymous);
  assert(!user.isEmailVerified);
  assert(await user.getIdToken() != null);
  assert(user.providerData.length == 1);
  assert(user.providerData[0].providerId == 'firebase');
  assert(user.providerData[0].uid != null);
  assert(user.providerData[0].displayName != null);
  assert(user.providerData[0].photoUrl == null);
  assert(user.providerData[0].email != null);

  final FirebaseUser currentUser = await _auth.currentUser();
  print(currentUser.uid);
  print(currentUser.isAnonymous);
  assert(user.uid == currentUser.uid);

  return 'signInAnonymously succeeded: $user';
}

print语句提供了一个userId(并且此id也位于firebase auth部分中)->在我看来，我已经登录了用户

the print statement provides a userId (and this id is also in firebase auth section) --> seems to me that i've got an logged in user

实现类似于Google示例中的初始化方式(链接):

implement kind of initialization like in the google example (link):

Future<void> main() async {
  final FirebaseApp app = await FirebaseApp.configure(
    name: 'mydbName',
    options: const FirebaseOptions(
       googleAppID: 'myAppId',
       apiKey: 'myApiKey',
       databaseURL: 'myUrl',
    ),
 );
 runApp(new MyApp(app));
}

在另一个有状态的状态小部件上，我尝试请求一些Firebase数据:

on another stateful widget in state i try to request some firebase data:

void initState() {
  final FirebaseDatabase database = new FirebaseDatabase(app: widget.app);
  database.reference().child('address').once().then((DataSnapshot snapshot) {
    print('Connected to database and read ${snapshot.value}');
  });
  super.initState();
}

我已删除了Firebase中的所有规则，除了:

i've removed all rules in firebase except:

".read": "auth != null",
".write": "auth != null",

我在firebase android app

我需要什么:

我需要一些提示，以了解该初始化代码或用户登录名或其他任何问题

I need some hint how to find out if there's any problem with that initialization code or with the user login or something else

推荐答案

在FirebaseApp.configure(

FirebaseDatabase.instance.reference().child(...)

将使用在google-services.json

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