Above image is the screenshot of the firestore database which I want to read on the order screen. But unable to do so. I want to display the array orders as a list of products on the order screen. Tried plenty of articles but unable to get the expected.

model_order.dart

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

class Order with ChangeNotifier {
  final String userId;
  final String orderId;
  final String name;
  int phoneNumber;
  final String addressType;
  final String address;
  final String area;
  final String city;
  final String deliverySlot;
  final Timestamp createdAt;
  List<Map<String, dynamic>> orders;


  Order({
    required this.userId,
    required this.orderId,
    required this.name,
    required this.phoneNumber,
    required this.addressType,
    required this.address,
    required this.area,
    required this.city,
    required this.deliverySlot,
    required this.createdAt,
    required this.orders,
  });
}

class OrderProvider with ChangeNotifier {
  final List<Order> _orders = [];

  List<Order> get getOrders => _orders;

  Future<void> fetchOrders() async {

    await FirebaseFirestore.instance
        .collection('orders')
        .orderBy('createdAt', descending: true)
        .get()
        .then((QuerySnapshot productSnapshot) {
      for (var element in productSnapshot.docs) {
        _orders.insert(
          0,
          Order(
            userId: element.get('userId'),
            orderId: element.get('orderId'),
            name: element.get('name'),
            phoneNumber: int.parse(element.get('phoneNumber').toString()),
            addressType: element.get('addressType'),
            address: element.get('address'),
            area: element.get('area'),
            city: element.get('city'),
            deliverySlot: element.get('deliverySlot'),
            createdAt: element.get('createdAt'),
            orders: element.get(FieldPath(['orders', 'title'])),
          ),
        );
      }
    });
  }

// Order getById(String prodId) {
//   // return _orders.firstWhere((element) => element.id == prodId);
// }
}

order_screen.dart

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../../models_providers/order.dart';
import 'package:intl/intl.dart';

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

  @override
  _FullOrderState createState() => _FullOrderState();
}

class _FullOrderState extends State<FullOrder> {
  @override
  Widget build(BuildContext context) {
    final order = Provider.of<Order>(context);
    final orderProvider = Provider.of<OrderProvider>(context);
    return Card(
      child: Padding(
        padding: const EdgeInsets.all(8.0),
        child: Column(
          children: [
            Text('Order Id: ${order.orderId}'),
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                Text(
                    'Order Date: ${DateFormat('dd/MM/yyyy').format(order.createdAt.toDate())}'),
                Text(
                    'Order Time: ${DateFormat('kk:mm').format(order.createdAt.toDate())}'),
              ],
            ),
            Padding(
              padding: const EdgeInsets.all(8.0),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  Column(
                    children: [
                      const Text(
                        'Customer Name',
                        style: TextStyle(fontWeight: FontWeight.bold),
                      ),
                      Text(order.name),
                    ],
                  ),
                  Column(
                    children: [
                      const Text(
                        'Contact',
                        style: TextStyle(fontWeight: FontWeight.bold),
                      ),
                      Text('${order.phoneNumber}'),
                    ],
                  )
                ],
              ),
            ),
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceEvenly,
              children: [
                Column(
                  children: [
                    const Text(
                      'Delivery Slot',
                      style: TextStyle(fontWeight: FontWeight.bold),
                    ),
                    Text(order.deliverySlot),
                  ],
                ),
                Column(
                  children: [
                    const Text(
                      'Address',
                      style: TextStyle(fontWeight: FontWeight.bold),
                    ),
                    Text('${order.addressType},${order.address}'),
                    Text(order.area),
                    Text(order.city),
                  ],
                ),
                ListView.builder(
                  itemCount: order.orders.length,
                  itemBuilder: (context, index) => Text(order.orders[index]['title']),
                )
              ],
            ),
          ],
        ),
      ),
    );
  }
}

CodePudding user response：

Pulling the orders out of an array field from a document should be no different than reading another value, with the exception that this is a List as opposed to a simpler structure or primitive value type. I created this

And this is how it looks when I run the Gist I gave you on DartPad:

Let me know if that works for you.