How to fetch specific data from querysnapshot in flutter-CodePudding

I am trying for so long to fetch specific data out of firebase collection using Futurebuilder querysnapshot. I've made a class for querysnapshot which is:

class Crud {
  final currentUser = FirebaseAuth.instance.currentUser!.uid;

  Future<QuerySnapshot> getData() async {
    return await FirebaseFirestore.instance
        .collection("userpreferences")
        .where(FirebaseAuth.instance.currentUser!.uid)
        .get();
  }
}

This is my futurebuilder.

FutureBuilder<QuerySnapshot>(
            future: crud.getData(),
            builder: (context, snapshot) {
              if (snapshot.hasData) {
                final querySnaphost = snapshot.data; // Get query snapshot
                if (querySnaphost!.docs.isNotEmpty) {
                  print(querySnaphost.docs[0].data());
 // Print is giving correct documents 
// I/flutter (16837): {peopletohangoutwith: Testing it again 
// I/flutter (16837): , agerange: 29 - 49}
                  // Document exists
                  final documentSnapshot = querySnaphost.docs;

I want agerange from this document only to show. I am using Text to show it. If anyone can tell me how can I fetch the data then please do let me know. Thank you

CodePudding user response：

Since you're not specifying what data your document contains when you create the StreamBuilder, you get back an Object when you call data(). You'll need to cast that to a Map<String, dynamic> to then be able to get the individual fields from it:

var data = Map<String,dynamic>.from(querySnaphost.docs[0].data() as Map);
return Text(data["peopletohangoutwith"]);