document.data()!["amount"]_error

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

import 'add_view.dart';

class Homeview extends StatefulWidget {
  const Homeview({Key? key}) : super(key: key);

  @override
  State<Homeview> createState() => _HomeviewState();
}

class _HomeviewState extends State<Homeview> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        decoration: BoxDecoration(
          color: Colors.white,
        ),
        width: MediaQuery.of(context).size.width,
        height: MediaQuery.of(context).size.height,
        child: StreamBuilder(
          stream: FirebaseFirestore.instance
              .collection('Users')
              .doc(FirebaseAuth.instance.currentUser?.uid)
              .collection('Coins')
              .snapshots(),
          builder:
              (BuildContext context, AsyncSnapshot<QuerySnapshot> snapshot) {
            if (!snapshot.hasData) {
              return Center(
                child: CircularProgressIndicator(),
              );
            }
            return ListView(
              children: snapshot.data!.docs.map((document) {
                return Container(
                  child: Row(
                    mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                    children: [
                      Text("Coin Name: ${document.id}"),
                      Text("Amount owned: ${document.data()!["amount"]}"),
                    ],
                  ),
                );
              }).toList(),
            );
          },
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          Navigator.push(
              context,
              MaterialPageRoute(
                builder: (context) => Addview(),
              ));
        },
        child: Icon(
          Icons.add,
          color: Colors.white,
        ),
        backgroundColor: Colors.blue,
      ),
    );
  }
}