Flutter - Class 'DocumentSnapshot' has no instance getter 'docs' - firebase

Question

I have 2 streams in my codes the first one is to get the userid from friend list and the second stream is to use the list of ids to search for the userid's document in firebase.
Stream friendIDStream;
Stream friendNameStream;
Widget friendList() {
return StreamBuilder(
stream: friendNameStream,
builder: (context, snapshot) {
return snapshot.hasData
? ListView.builder(
itemCount: snapshot.data.docs.length,
itemBuilder: (context, index) {
return FriendTile(
snapshot.data.docs[index].data()["username"]);
},
)
: Container();
},
);
}
#override
void initState() {
getUserFriend();
getNameByID();
super.initState();
}
getUserFriend() async {
Constant.currentId =
await HelperFunctions.getUserIdSharedPreference(Constant.currentId);
setState(() {
firebaseMethods.getFriend(Constant.currentId).then((value) {
setState(() {
friendIDStream = value;
});
});
});
}
getNameByID() {
setState(() {
firebaseMethods.getFriendName(friendIDStream).then((value) {
setState(() {
friendNameStream = value;
});
});
});
}
This is the firestore code.
Future getFriend(String ownerid) async {
return await FirebaseFirestore.instance
.collection("users")
.doc(ownerid)
.collection("friends")
.snapshots();
}
Future getFriendName(friendid) async {
return await FirebaseFirestore.instance
.collection("users")
.doc(friendid)
.snapshots();
}
I doesn't know why is this happening since I can display the list of ids. I had tried changing docs to doc but is also produce the same error.
Edit:
Added photos of my database structure.

Answer 1

the reason is your function getFriendName is returning a documentsnapshot not a querysnapshot. SO replace your old code with this:-
Widget friendList() {
return StreamBuilder(
stream: friendNameStream,
builder: (context, snapshot) {
return snapshot.hasData
? ListView.builder(
itemCount: 1,
itemBuilder: (context, index) {
return FriendTile(
//snapshot.data.docs[index].data()["username"] old one
snapshot.data["username"]); //new one
},
)
: Container();
},
);
}