I am trying to display the name to the appbar but userid part seems like giving an error. iam a beginner to flutter and firestore can someone help me

class Profile extends StatefulWidget {
  @override
  _ProfileState createState() => _ProfileState();
}

class _ProfileState extends State<Profile> {
  //To retrieve the Userid
  User? user;
  Future<void> getUserData() async {
    User userData = await FirebaseAuth.instance.currentUser!;
    setState(() {
      user = userData;
      print(userData.uid);
    });
  }
///////////////////////////////////////

  Future<String>? _title;
  @override
  void initState() {
    getUserData().then((value) => _title = _getAppBarNameWidget());
    // _title = _getAppBarNameWidget();
    super.initState();
  }

//To retrieve the name from firestore
  Future<String> _getAppBarNameWidget() async =>
      await FirebaseFirestore.instance
          .collection('customer')
          .doc(user!.uid)
          .get()
          .then((DocumentSnapshot ds) async {
        var name = ds['name'];
        return name;
      });

CodePudding user response：

DocumentSnapshot ds does not directly contain document data, only document id, you have to use data() function to get data. It is also a good idea to check whether the document really exists, because you will get a snapshot event if the document is not found.

Examples:

ds.exists          // will return true if document is found
ds.id              // will return document reference
ds.data()!['name'] // will return 'name' field of document