错误类型“Null”不是“Timestamp”类型的子类型

Question

I am setting the current date in firebase and trying to retrieve it to use as a reference. But somehow the results vary. Sometimes I'm having a null value but sometimes it's okay. I tried to add a delay command but it is still behaving the same. Please help. Thanks!

        //set current date
        await db.collection(Paths.playersPath).doc(uid).set({
          'currDate': FieldValue.serverTimestamp(),
        }, SetOptions(merge: true));

        DocumentSnapshot<Map<String, dynamic>> documentSnapshot =
            await db.collection(Paths.playersPath).doc(uid).get();

        Timestamp currDate = documentSnapshot.data()!['currDate'];

Edit: I'm not really sure if it is connected but I have 2 methods that call the same logic. One is under a HookWidget which almost always fail and another in StatefulWidget which never have a problem.

Edit: I don't really know why. But when I move the event which update the current date to a Stateful Widget, it is now working. Hopefully someone can clarify this.

Answer 1

Can you try this:

db.collection(Paths.playersPath).doc(uid).get().then((value) => value.data();['currDate']);

You can also try to chain then with db.collection(Paths.playersPath).doc(uid).set if still not working