如何在列表中打印集合字段

Question

如何在列表中打印field1,field2,field3,field4?

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:grocery_shopping/pages/home/homepage.dart';
import 'package:grocery_shopping/widgets/cart_products.dart';
import 'package:grocery_shopping/widgets/cart_total.dart';
class OrderSuccessful extends StatefulWidget {
@override
_OrderSuccessfulState createState() => _OrderSuccessfulState();
}
class _OrderSuccessfulState extends State<OrderSuccessful> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text("Order Successful")),
resizeToAvoidBottomInset: true,
body: Column(
children: [
CartTotal(),
StreamBuilder(
stream: FirebaseFirestore.instance.collection('personalinfo').snapshots(),
builder: (BuildContext context, AsyncSnapshot<QuerySnapshot> snapshot){
if (!snapshot.hasData){
return Text("no value");
}
return ListView(
children: snapshot.data!.docs.map((document){
return Text(document['field1'] + " " + document['field2'] + " " + document['field3'] + " " + document['field4'], textAlign: TextAlign.center, style: TextStyle(color: Colors.black, fontWeight: FontWeight.bold, fontSize: 18));
}).toList(),
shrinkWrap: true,
);
},
),
ElevatedButton(
onPressed: () => Get.to(() => CatalogScreen()),
child: Text('Continue'),
),
],
));
}
}

Answer 1

return ListView(
children: snapshot.data!.docs.map((document){
print(document['field1']); // print goes here
print(document['field2']);
return Text(document['field1'] + " " + document['field2'] + " " + document['field3'] + " " + document['field4'], textAlign: TextAlign.center, style: TextStyle(color: Colors.black, fontWeight: FontWeight.bold, fontSize: 18));
}).toList(),
shrinkWrap: true,
);

//试试这个