I tried two posibilities but the firebase data isnt being stored in the products list.The app page returns no data as there is nothing in procucts list. foollowing list returns data succesfully.The second possibilty that i tried and the Consolelog is in this pastebin link below: https://pastebin.com/DM47YHY6
List<String> foollowingList = [];
List<NetworkImage> _listOfImages = <NetworkImage>[];
List<DocumentSnapshot> products = []; // stores fetched products
bool isLoading = true; // track if products fetching
bool hasMore = true; // flag for more products available or not
int documentLimit = 10; // documents to be fetched per request
DocumentSnapshot lastDocument; // flag for last document from where next 10 records to be fetched
ScrollController _scrollController = ScrollController(); /
void initState() {
super.initState();
getFfollowing();
getPosts();
_scrollController.addListener(() {
double maxScroll = _scrollController.position.maxScrollExtent;
double currentScroll = _scrollController.position.pixels;
double delta = MediaQuery.of(context).size.height * 0.20;
if (maxScroll - currentScroll <= delta) {
getMorePosts();
}
});
}
getFfollowing() async {
QuerySnapshot snapshot = await followingRef
.document(currentUser.id)
.collection('userFollowing')
.getDocuments();
setState(() {
foollowingList = snapshot.documents.map((doc) => doc.documentID).toList();
});
}
getPosts()async{
for( int i=0; i< foollowingList.length; i++) {
Query q = Firestore.instance
.collection('posts/${foollowingList[i]}/userPosts')
.orderBy('ownerId')
.orderBy('timestamp', descending: true)
.limit(documentLimit);
setState(() {
isLoading = true;
});
QuerySnapshot querySnapshot = await q.getDocuments();
print("kjndskjl$products");
lastDocument = querySnapshot.documents[querySnapshot.documents.length - 1];
products = querySnapshot.documents;
setState(() {
isLoading = false;
});
}
}
getMorePosts()async{
print('get more called');
if(hasMore == false){
return;
} if(hasMore == true){
return;
}
hasMore = true;
for( int i=0; i< foollowingList.length; i++) {
Query q = await Firestore.instance
.collection('posts/${foollowingList[i]}/userPosts')
.orderBy('ownerId')
.orderBy('timestamp', descending: true)
.startAfterDocument(lastDocument)
.limit(documentLimit);
QuerySnapshot querySnapshot = await q.getDocuments();
if (querySnapshot.documents.length == 0) {
hasMore = false;
}
lastDocument = querySnapshot.documents[querySnapshot.documents.length - 1];
products.addAll(querySnapshot.documents);
setState(() {
hasMore = false;
print(products);
});
}
}
buildPosts(){
return
Column(children: [
Expanded(
child: products.length == 0
? Center(
child: Text('No Data...'),
)
: ListView.builder(
controller: _scrollController,
itemCount: products.length,
itemBuilder: (context, index) {
return
FutureBuilder(
future: usersRef.document(products[index].data['ownerId']).get(),
builder: (context, snapshot) {
if (!snapshot.hasData) {
return circularProgress();
}
User user = User.fromDocument(snapshot.data);
return Column(children: <Widget>[
ListTile(
leading: GestureDetector(
onTap: () => showProfile(context, profileId: user.id),
child: CircleAvatar(
backgroundImage: CachedNetworkImageProvider(user.photoUrl),
backgroundColor: Colors.grey,
),
),
title: GestureDetector(
onTap: () => showProfile(context, profileId: user.id),
child: Text(
user.displayName,
style: TextStyle(
color: kText,
fontWeight: FontWeight.bold,
),
),
),
subtitle: GestureDetector(
onTap: () => showProfile(context, profileId: user.id),
child: Text(user.username,
style: TextStyle(color: kIcon),),
),),
cachedNetworkImage(products[index].data['mediaUrl']),
Divider(color: kGrey,),
],
);
},
);
