How to get Firebase snapshots length?

Question

I've created an app with Firebase but I've got a problem, which is that I

can't count the snapshot length in listview.builder.

StreamBuilder(
        stream:
            _firestore.collection('/posts/${widget.uid}/comments').snapshots(),
        builder: (context, snapshot) {
          final data = snapshot.data.documents;

          if (!snapshot.hasData) {
            return SpinKitChasingDots(
              color: Colors.lightGreen,
            );
          }
          return ListView.builder(
            itemCount: snapshot.data.documents.length,//Here is the problem
            itemBuilder: (context, index) {
              return PostComment(
                commentText: data[index]['commentText'],
                userImage: data[index]['userImage'],
                userName: data[index]['userName'],
              );
            },
          );
        },
      ),

When I run it gives me an error that it doesn't have actually a getter called length.

Solution

Try to explicitly declare type in your StreamBuilder

StreamBuilder<QuerySnapshot>(
        stream: _firestore.collection('...').snapshots(),

https://dart.dev/guides/language/sound-problems#runtime-errors

Comments

[dfdfdsfsd]

everything is going okay except displaying it as I've mentioned above

[Dennis Alund]

Can you confirm that you tried the answer and it didn't help?

[dfdfdsfsd]

I've not noticed your data type declaring and it worked, thanks

[Community]

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