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Flutter Firestore query to return list
I am using flutter and firebase to build a social network like program and currently need to find away to return a list of users that a user has not followed.
In order to accomplish that, I'm trying to generate a list of userIDs for which the user is following and then cycle through every userID (will likely put in a limit)and determine if that ID is in the list of userIDs that the user has not followed. I would then return a list of widgets for this.
Currently, I am trying to call a Stream of current followers in order to return a list of everyone the user is currently following, but Flutter is not letting me return a List from this?
class AddFollowers extends StatelessWidget {
final String userId = 'userID imported here';
Stream<List<String>> getFollowers(userId) async {
final QuerySnapshot result = await Firestore.instance
.collection('relationships')
.document(userId)
.collection('followers')
.where("follower", isEqualTo: true)
.getDocuments();
final List<DocumentSnapshot> documents = result.documents;
return documents;
}
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: AppBar(
elevation: 0.0,
leading: IconButton(
icon: Icon(Icons.close),
onPressed: () => Navigator.of(context).pop(),
),
title: new Text("Find Your Following"),
),
body: new Container(
child: new StreamBuilder(
stream: getFollowers(userId),
builder:
null //after returning the followers, I will build widgets of non-followers
),
),
// new FindFollowerWidget(),
);
}
}
Any advice how to return this or better structure this is very much appreciated. Thanks!
flutter google-cloud-firestore asked Nov 22 '18 at 4:44
PJQuakJagPJQuakJag
629
add a comment |
I am using flutter and firebase to build a social network like program and currently need to find away to return a list of users that a user has not followed.
In order to accomplish that, I'm trying to generate a list of userIDs for which the user is following and then cycle through every userID (will likely put in a limit)and determine if that ID is in the list of userIDs that the user has not followed. I would then return a list of widgets for this.
Currently, I am trying to call a Stream of current followers in order to return a list of everyone the user is currently following, but Flutter is not letting me return a List from this?
class AddFollowers extends StatelessWidget {
final String userId = 'userID imported here';
Stream<List<String>> getFollowers(userId) async {
final QuerySnapshot result = await Firestore.instance
.collection('relationships')
.document(userId)
.collection('followers')
.where("follower", isEqualTo: true)
.getDocuments();
final List<DocumentSnapshot> documents = result.documents;
return documents;
}
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: AppBar(
elevation: 0.0,
leading: IconButton(
icon: Icon(Icons.close),
onPressed: () => Navigator.of(context).pop(),
),
title: new Text("Find Your Following"),
),
body: new Container(
child: new StreamBuilder(
stream: getFollowers(userId),
builder:
null //after returning the followers, I will build widgets of non-followers
),
),
// new FindFollowerWidget(),
);
}
}
Any advice how to return this or better structure this is very much appreciated. Thanks!
flutter google-cloud-firestore asked Nov 22 '18 at 4:44
PJQuakJagPJQuakJag
629
1
.getDocuments(); return Future<QuerySnapshot> not Stream. You Should Simply do - Firestore.instance .collection('relationships') .document(userId) .collection('followers') .where("follower", isEqualTo: true) .snapshots(); return result;
– anmol.majhail
Nov 22 '18 at 8:25
Thank you! That worked and was my issue! If you leave as answer, happy to accept it!
– PJQuakJag
Nov 23 '18 at 6:00
add a comment |
I am using flutter and firebase to build a social network like program and currently need to find away to return a list of users that a user has not followed.
In order to accomplish that, I'm trying to generate a list of userIDs for which the user is following and then cycle through every userID (will likely put in a limit)and determine if that ID is in the list of userIDs that the user has not followed. I would then return a list of widgets for this.
Currently, I am trying to call a Stream of current followers in order to return a list of everyone the user is currently following, but Flutter is not letting me return a List from this?
class AddFollowers extends StatelessWidget {
final String userId = 'userID imported here';
Stream<List<String>> getFollowers(userId) async {
final QuerySnapshot result = await Firestore.instance
.collection('relationships')
.document(userId)
.collection('followers')
.where("follower", isEqualTo: true)
.getDocuments();
final List<DocumentSnapshot> documents = result.documents;
return documents;
}
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: AppBar(
elevation: 0.0,
leading: IconButton(
icon: Icon(Icons.close),
onPressed: () => Navigator.of(context).pop(),
),
title: new Text("Find Your Following"),
),
body: new Container(
child: new StreamBuilder(
stream: getFollowers(userId),
builder:
null //after returning the followers, I will build widgets of non-followers
),
),
// new FindFollowerWidget(),
);
}
}
Any advice how to return this or better structure this is very much appreciated. Thanks!
flutter google-cloud-firestore asked Nov 22 '18 at 4:44
PJQuakJagPJQuakJag
629
I am using flutter and firebase to build a social network like program and currently need to find away to return a list of users that a user has not followed.
In order to accomplish that, I'm trying to generate a list of userIDs for which the user is following and then cycle through every userID (will likely put in a limit)and determine if that ID is in the list of userIDs that the user has not followed. I would then return a list of widgets for this.
Currently, I am trying to call a Stream of current followers in order to return a list of everyone the user is currently following, but Flutter is not letting me return a List from this?
class AddFollowers extends StatelessWidget {
final String userId = 'userID imported here';
Stream<List<String>> getFollowers(userId) async {
final QuerySnapshot result = await Firestore.instance
.collection('relationships')
.document(userId)
.collection('followers')
.where("follower", isEqualTo: true)
.getDocuments();
final List<DocumentSnapshot> documents = result.documents;
return documents;
}
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: AppBar(
elevation: 0.0,
leading: IconButton(
icon: Icon(Icons.close),
onPressed: () => Navigator.of(context).pop(),
),
title: new Text("Find Your Following"),
),
body: new Container(
child: new StreamBuilder(
stream: getFollowers(userId),
builder:
null //after returning the followers, I will build widgets of non-followers
),
),
// new FindFollowerWidget(),
);
}
}
Any advice how to return this or better structure this is very much appreciated. Thanks!
flutter google-cloud-firestore flutter google-cloud-firestore asked Nov 22 '18 at 4:44
PJQuakJagPJQuakJag
629
asked Nov 22 '18 at 4:44
PJQuakJagPJQuakJag
629
asked Nov 22 '18 at 4:44
PJQuakJagPJQuakJag
629
asked Nov 22 '18 at 4:44
PJQuakJagPJQuakJag
629
asked Nov 22 '18 at 4:44
PJQuakJagPJQuakJag
629
629
1
.getDocuments(); return Future<QuerySnapshot> not Stream. You Should Simply do - Firestore.instance .collection('relationships') .document(userId) .collection('followers') .where("follower", isEqualTo: true) .snapshots(); return result;
– anmol.majhail
Nov 22 '18 at 8:25
Thank you! That worked and was my issue! If you leave as answer, happy to accept it!
– PJQuakJag
Nov 23 '18 at 6:00
add a comment |
1
.getDocuments(); return Future<QuerySnapshot> not Stream. You Should Simply do - Firestore.instance .collection('relationships') .document(userId) .collection('followers') .where("follower", isEqualTo: true) .snapshots(); return result;
– anmol.majhail
Nov 22 '18 at 8:25
Thank you! That worked and was my issue! If you leave as answer, happy to accept it!
– PJQuakJag
Nov 23 '18 at 6:00
1
1
.getDocuments(); return Future<QuerySnapshot> not Stream. You Should Simply do - Firestore.instance .collection('relationships') .document(userId) .collection('followers') .where("follower", isEqualTo: true) .snapshots(); return result;
– anmol.majhail
Nov 22 '18 at 8:25
.getDocuments(); return Future<QuerySnapshot> not Stream. You Should Simply do - Firestore.instance .collection('relationships') .document(userId) .collection('followers') .where("follower", isEqualTo: true) .snapshots(); return result;
– anmol.majhail
Nov 22 '18 at 8:25
Thank you! That worked and was my issue! If you leave as answer, happy to accept it!
– PJQuakJag
Nov 23 '18 at 6:00
Thank you! That worked and was my issue! If you leave as answer, happy to accept it!
– PJQuakJag
Nov 23 '18 at 6:00
add a comment |
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.getDocuments(); return Future<QuerySnapshot> not Stream. You Should Simply do - Firestore.instance .collection('relationships') .document(userId) .collection('followers') .where("follower", isEqualTo: true) .snapshots(); return result;
– anmol.majhail
Nov 22 '18 at 8:25
Thank you! That worked and was my issue! If you leave as answer, happy to accept it!
– PJQuakJag
Nov 23 '18 at 6:00