我如何获得当前用户文档id/名称从Firestore与Flutter?

Question

我是新手。我有如何使用语法获取当前用户文档ID/名称的问题。

Future<User?> readUser() async {
final docUser =
FirebaseFirestore.instance.collection('users').doc('How do I get this document ID');

final snapshot = await docUser.get();
if (snapshot.exists) {
return User.fromJson(snapshot.data()!);
} else {
print('User does not exist');
}
}

这是我的User类，我存储我的详细信息

class User {
String uid;
final String name;
final int age;
final String email;
User({
this.uid = '',
required this.name,
required this.age,
required this.email,
});
Map<String, dynamic> toJson() => {
'uid': uid,
'name': name,
'age': age,
'email': email,
};
static User fromJson(Map<String, dynamic> json) => User(
uid: json['id'],
name: json['name'],
age: json['age'],
email: json['email'],
);
}

我试着

final firebaseUser = await FirebaseAuth.instance.currentUser
Future<User?> readUser() async {
final docUser =
FirebaseFirestore.instance.collection('users').doc(firebaseUser.uid);

final snapshot = await docUser.get();
if (snapshot.exists) {
return User.fromJson(snapshot.data()!);
} else {
print('User does not exist');
}
}

但是行不通

firestore的图片在这里

Answer 1

这只是snapshot.id

例如

Future<T> get<T>({
String path,
T Function(Map<String, dynamic> data, String documentID) builder,
}) async {
final reference = FirebaseFirestore.instance.doc(path);
final DocumentSnapshot snapshot = await reference.get();
return builder(snapshot.data() as Map<String, dynamic>, snapshot.id);
}

Answer 2

访问当前用户id使用FirebaseAuth.instance.currentUser!.uid

访问当前用户名使用FirebaseAuth.instance.currentUser!.displayName

---

如何收听当前用户的文档

class _UserInformationState extends State<UserInformation> {
final _usersStream = FirebaseFirestore.instance
.collection('users')
.doc(FirebaseAuth.instance.currentUser!.uid) 
.snapshots();
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: StreamBuilder<DocumentSnapshot<Map<String, dynamic>>>(
stream: _usersStream,
builder:
(BuildContext context, AsyncSnapshot<DocumentSnapshot> snapshot) {
if (snapshot.hasError) {
return const Text('Something went wrong');
}
if (snapshot.connectionState == ConnectionState.waiting) {
return const Text("Loading");
}
Map<String, dynamic> data =
snapshot.data!.data()! as Map<String, dynamic>;
return Text(data['fullName']);
},
),
),
);
}
}