Instance of _Future<int> is all I get when I try to get the total 'document' of my 'collection' in Firestore - Flutter

warmxd
December 26, 2022
313 views
0 votes
2 Answers

Following is my code. I’m trying to get all the ‘Babies’ which are in documents:

class _HomePageeState extends State<HomePagee> {
  String t_babies = getCount().toString();
}

Future getCount() async {
  return FirebaseFirestore.instance.collection('Babies').snapshots().length;
}

Instead I get this error: instance of _future<int>

Here is my Database. I expect to get 2 counts:

Answers

- WilsonToribio
- December 26, 2022 at 1:47 pm
- 0 votes
0
You need to use await when getting Future values and also you should pass Future and the type Future<int>:
```
Future<int> getCount() async {
  return await FirebaseFirestore.instance.collection('Babies').snapshots().length;
}
```
and also get the method using await but inside and async function:
```
void example() async {  // <---- here the async you need to add to use await
      int babiesLength = await getCount();  // here use await
    }
```
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- AgniGari
- January 1, 2023 at 12:59 pm
- 0 votes
0
You should use setState to update the string , because the fetch takes time as it involves network.
```
String t_babies = '';

  Future<void> _getCount() async {
    setState((){
        t_babies = FirebaseFirestore.instance.collection('Babies').snapshots().length.toString();
    });
  }

  @override
  void initState() {
    super.initState();
    _getCount();
  }
```
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