Firestore collection query as stream in flutter - firebase

Question

I'm trying to query a few documents from a collection, this query should listen to changes made in the queried documents, so I'd need a stream. I'm doing following (in Dart/Flutter)
Stream<List<MatchRequest>> _getNewMatches() {
return Collection<MatchRequest>(path: 'requests')
.ref
.where('status', isNull: true)
.where('users', arrayContains: ['$currentUid'])
.orderBy('last_activity')
.snapshots()
.map((list) => list.documents.map(
(doc) => Global.models[MatchRequest](doc.data) as MatchRequest));
}
(The object Collection sets the path to the ref in it's constructor, eg: ref = db.collection($path) and the map makes a model of the results)
Then I'm using a StreamBuilder with stream invoking the method above and builder checking if snapshot.hasData. But it keeps loading, snapshot.hasData keeps being false. What am I doing wrong here?
EDIT:
My firestore security rules contain:
match /requests/{requestId} {
allow read: if isLoggedIn();
allow write: if isLoggedIn();
}
When removing every where and orderBy, it doesn't find anything as well. And there are documents present in the requests-collection
When trying to query only 1 document as a stream from the requests-collection, he does find the result
Is it because I should add indexes to my firestore indexes? But this won't solve my first problem which is that even without where and orderBy, it doesn't get any data

Answer 1

I've written a simple example of it seems to be like what you are trying to do but are missing the listen() method:
Firestore.instance.collection('collection')
.where('field', isEqualTo: 'value')
.orderBy('field')
.snapshots()
.listen((QuerySnapshot querySnapshot){
querySnapshot.documents.forEach((document) => print(document));
}
);
This is just an example of how you can take the data from a Firestore Stream and use it on a StreamBuilder:
class _MyHomePageState extends State<MyHomePage> {
Stream dataList;
#override
void initState() {
dataList = Firestore.instance.collection('collection')
.where('field', isEqualTo: 'value')
.orderBy('field')
.snapshots();
super.initState();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: StreamBuilder(
stream: dataList,
builder: (context, asyncSnapshot) {
if(asyncSnapshot.hasError)
return Text('Error: ${asyncSnapshot.error}');
switch (asyncSnapshot.connectionState) {
case ConnectionState.none: return Text('No data');
case ConnectionState.waiting: return Text('Awaiting...');
case ConnectionState.active:
return ListView(
children: asyncSnapshot.data.map((document) => Text(document['value'])),
);
break;
case ConnectionState.done: return ListView(
children: asyncSnapshot.data.map((document) => Text(document['value'])),
);
break;
}
return null;
}),
),
);
}
}