Flutter 用户文档 ID 与 Firestore 中的用户 ID 相同

发布于06月02日

我try 将集合中的用户作为文档存储在FiRestore中，并希望使每个用户ID与文档ID相同. 我try 了，但它仍然为我提供了该用户的另一个ID:

Future<void> userSetupDone() async {
CollectionReference users = FirebaseFirestore.instance.collection('Users');

final docUser = FirebaseFirestore.instance.collection('Users').doc();

FirebaseAuth auth = FirebaseAuth.instance;
String? uid = docUser.id;
// String? uid = auth.currentUser?.uid.toString();
String? email = auth.currentUser?.email.toString();
String? phone = auth.currentUser?.phoneNumber.toString();
String? displayName = auth.currentUser?.displayName.toString();

users.add({'Uid': uid, "Email": email, "Phone": phone, "Name": displayName});
return;
}

推荐答案

将数据添加到数据库后，您必须立即更新uid.因为在从FiRestore数据库添加该数据之前，您无法获取ID.

您将通过以下代码获得它:

 Future<void> userSetupDone() async {
    CollectionReference users = FirebaseFirestore.instance.collection('Users');
    
    final docUser = FirebaseFirestore.instance.collection('Users').doc();
    
    FirebaseAuth auth = FirebaseAuth.instance;

    String? email = auth.currentUser?.email.toString();
    String? phone = auth.currentUser?.phoneNumber.toString();
    String? displayName = auth.currentUser?.displayName.toString();
    
    DocumentReference reference= await users.add({'Uid': '', "Email": email, "Phone": phone, "Name": displayName});
    await reference.update({"Uid": reference.id});
    return;
}