How to check if FirebaseAnimatedList returns data in flutter

user_13696754 0
Viewed 455

I need to show another widget if FirebaseAnimatedList query not return any data, so not only show blank screen, how can I do this?

I am using

if(snapshot.value != null){} and if(!snapshot.exists()) {}

but it does not work.

flutter android ios
1 Answers

You need to check the size of the list of documents.

For example:

 //check in Firebase - Realtime Database
 final FirebaseDatabase _database = FirebaseDatabase(app: FirebaseApp.instance);
 void checkEmptyList() async {
    var data = await _database.reference().child('your_child').once();
    if (data.value == null) {
      //document without data
    } else {
      //document with data
    }
  }

  //check in Firebase - Cloud Firestore
  final Firestore _fireStore = Firestore.instance;
  void checkEmptyList() async {
    var doc = await _fireStore.collection("your_collections").getDocuments();
    if (doc.documents.isEmpty) {
      //document without data
    } else {
      //document with data
    }
  }
user_46951130
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