Flutter Firebase - 无法从 Firestore 获取数据

Question

I am trying to get the data from "savedGoal" collection and somehow it is throwing error (NoSuchMethodError). However same script/syntax of code is working absolutely fine for another collection on same firebase project. Please let me know what could be wrong here. Here is the script that I am running in ininState()-

FirebaseFirestore.instance
        .collection("savedGoals")
        .where('uid', isEqualTo: FirebaseAuth.instance.currentUser.uid)
        .get()
        .then((value) {
      value.docs.forEach((result) async {
        if (result.data().isNotEmpty) {
          setState(() {
            goalAmount = result.data()['goalAmountFixed'];
          });
        }

Here is the screenshot of error that I am receiving while using "savedGoal" collection - enter image description here

Here is the firebase document screenshot- enter image description here

Answer 1

Check in main.dart that if you have intialized firebase correctly. In case if you have not initialzed firebase in your project then try initializing it by adding this line in main:

main() async {
await Firebase.initializeApp(
options: DefaultFirebaseOptions.currentPlatform,

); }

Answer 2

You don't need to call.data() to get the value of the key. just get the value of your key directly from QuerySnapshot as I did below.

FirebaseFirestore.instance
    .collection("savedGoals")
    .where('uid', isEqualTo: FirebaseAuth.instance.currentUser!.uid)
    .get()
    .then((value) {
  for (var result in value.docs) {
    if (result.data().isNotEmpty) {
      setState(() {
        goalAmount = result['goalAmountFixed'];
      });
    }
  }
});

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