How to get specific fields from documentsnapshot - flutter

Question

I have collection where i want to get fields. I have followed instructions on flutter fire and it says to use get() to retrieve documentsnapshot. I am creating a documentsnapshot object and trying to get all for a given id. Now i am trying to pass this stream into streambuilder and display specific fields. But i am getting error;
type '_BroadcastStream<DocumentSnapshot<Map<String, dynamic>>>' is not a subtype of
type
'Stream<QuerySnapshot<Object?>>?'
My code is;
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:quicktodo/model/authservice.dart';
class events extends StatefulWidget {
analytics({Key? key}) : super(key: key);
String uida = FirebaseAuth.instance.currentUser!.uid;
#override
_analyticsState createState() => _analyticsState();
}
class _ eventsState extends State<analytics> {
late final _stream;
String uid = FirebaseAuth.instance.currentUser!.uid;
void initState() {
super.initState();
setState(() {
_stream = FirebaseFirestore.instance.collection('events').doc(uid).get();
});
}
#override
Widget build(BuildContext context) {
final authService = Provider.of<AuthClass>(context);
return Scaffold(
appBar:AppBar(
leading:
IconButton(
icon: Icon(Icons.logout),
tooltip: 'List of your activities',
onPressed: () {
authService.signout(
);
},
),
title: const Text('Activity list'),
actions: <Widget>[
IconButton(
icon: const Icon(Icons.add),
tooltip: 'List of your activities',
onPressed: () {
},
),
],
),
body: StreamBuilder(
stream: _stream,
builder: (BuildContext context, AsyncSnapshot<QuerySnapshot> snapshot) {
if (snapshot.hasError) {
return Text('Something went wrong');
}
if (snapshot.connectionState == ConnectionState.waiting) {
return Text("Loading");
}
return ListView(
children: snapshot.data!.docs.map((DocumentSnapshot document) {
// final trip = DataModel.fromSnapshot(document);
Map a = document.data() as Map<String, dynamic>;
a['id'] = document.id;
return Container(
child: Text(a['eventone']),
);
}).toList(),
);
},
),
);
}
}

Answer 1

Replace your stream builder with this:
return StreamBuilder(
stream: FirebaseFirestore.instance
.collection('events')
.doc(uid)
.snapshots(),
builder:
(BuildContext context, AsyncSnapshot<DocumentSnapshot> snapshot) {
if (snapshot.hasError) return Text('Something went wrong');
if (snapshot.connectionState == ConnectionState.waiting)
return Text("Loading");
Map data = snapshot.data.data();
print(data['eventide']); // should print 4
print(data['eventtwo']); // should print 5
return SizedBox();
},
);
I changed your initial stream builder because it will only work for collection snapshot, not document snapshot.