Not able to access the data from firebase using StreamBuilder in flutter

Question

Here I am trying to get the data from the firebase database using firstore instance in streamBuilder.

.collection('/message_data/friendA##friendB/message_list') :-this is my collection-document path from firebase

No error, just a blank page.

     @override
     Widget build(BuildContext context) {
       return Scaffold(
       appBar: AppBar(
       title: Text(widget.friendName),
     ),
     body: Column(
     children: <Widget>[
      Flexible(
          child: StreamBuilder(
        stream: Firestore.instance
            .collection('/message_data/friendA##friendB/message_list')
            .snapshots(),
        builder: (BuildContext context, AsyncSnapshot snapshot) {
          if (snapshot.hasError) {
            return Text('Error on chatView ${snapshot.error.toString()}');
          }
          if (snapshot.connectionState == ConnectionState.active) {
            if (snapshot.hasData) {
              if (snapshot.data.documents .length > 0) {
                return ListView.builder(

                  itemCount: snapshot.data.documents.length,
                  itemBuilder: (BuildContext context, int index) {
                    DocumentSnapshot _document = snapshot.data.documents[index];



                    return ChatMessage(
                      isFriend: _document['fromA'],

                      isNotPrevious:snapshot.data.documents.length - 1 == index,
                      message: _document['content'],
                      friendInitial: 'T',

                      avatarUrl:'https://avatarfiles.alphacoders.com/132/132399.jpg',
                    );
                  },
                );

              }
              else{
                return Text('No messages found in chat view length vala'); 
              }
            }
            else{
                return Text('No messages found in chat view hasdata'); 
              }
          }
          else{
            return CircularProgressIndicator();
          }
        },
      )),

@JohnJoe.Tried doing that as well. No it didn't go to if (snapshot.hasData). — Harsh, Feb 10 '20 at 09:09
@JohnJoe I see that it isn't even getting into that dart file. — Harsh, Feb 10 '20 at 09:13
@JohnJoe Yes I will. I will notify you here once I upload the project. — Harsh, Feb 10 '20 at 09:15
@JohnJoe [link](https://github.com/riac999/Flutter-Chat-App.git). — Harsh, Feb 10 '20 at 09:38
@JohnJoe Is it possible to look into the issue without a firebase access? — Harsh, Feb 10 '20 at 11:24
@JohnJoe I dont know but there is a problem somewhere cannot upload the entire project just the files are getting updated. I have updated it somehow, just have a look. I am really stuck at this point and needs a help. — Harsh, Feb 10 '20 at 19:34
I don't know why it's not giving you an error, but I think it is a problem with the firestore security rule. Could you copy and paste the current security rule in your question? — dshukertjr, Feb 12 '20 at 23:25
[https://stackoverflow.com/questions/69901681/unable-to-fetch-data-from-firebase-firestore-using-flutter](https://stackoverflow.com/questions/69901681/unable-to-fetch-data-from-firebase-firestore-using-flutter) I am facing same issue.Is it working for you now ????? — ud_, Nov 09 '21 at 19:48
[i am facing same issue, here. Did youre problem resolve???](https://stackoverflow.com/questions/69901681/unable-to-fetch-data-from-firebase-firestore-using-flutter) — ud_, Nov 09 '21 at 19:50

score 0 · Answer 1 · answered Feb 12 '20 at 23:30

0

I think you have some error in your snapshot, but you also have an error in how you access your firestore data here. You have to access the data property of your DocumentSnapshot in order to access the data.

DocumentSnapshot _document = snapshot.data.documents[index];
Map chatData = _document.data;


return ChatMessage(
    isFriend: chatData['fromA'],

    isNotPrevious:snapshot.data.documents.length - 1 == index,
    message: chatData['content'],
    friendInitial: 'T',

    avatarUrl:'https://avatarfiles.alphacoders.com/132/132399.jpg',
);

answered Feb 12 '20 at 23:30

dshukertjr

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@Harsh I'm sure there is an error with the security rules of firestore. Could you copy and paste it to the question? – dshukertjr Feb 16 '20 at 12:45
what do you want me to copy paste to the question? – Harsh Feb 17 '20 at 17:37
@Harsh Do you know what security rules are in firestore? I think there's something wrong with it, so I want to see it to fix your issue. Could you go to your firebase console and copy and paste the security rules so that I can fix your issue? – dshukertjr Feb 17 '20 at 23:52
rules_version = '2'; service cloud.firestore { match /databases/{database}/documents { match /{document=**} { allow read, write: if true; } } } – Harsh Feb 23 '20 at 12:17

Not able to access the data from firebase using StreamBuilder in flutter

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