I have the following class:
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/foundation.dart';
class Hisab with ChangeNotifier {
Map<String, dynamic> _items = {};
Hisab({
@required String hisabDate,
@required double total,
@required bool paidStatus,
@required String timestamp,
@required Timestamp serverTimestamp,
}) {
_items['hisabDate'] = hisabDate;
_items['total'] = total;
_items['paidStatus'] = paidStatus;
_items['timestamp'] = timestamp;
_items['serverTimestamp'] = serverTimestamp;
}
Map<String, dynamic> get items => _items;
}
I created this class to hold items from firestore so that I can allow the user to filter and search by date.
When I try to initialize this class inside MultiProvider, I will have to pass arguments to the constructor.
return MultiProvider(
providers: [
ChangeNotifierProvider<CurrentIndex>(create: (_) => CurrentIndex()),
ChangeNotifierProvider<Cart>(
create: (_) => Cart(),
),
ChangeNotifierProvider<Hisab>(
create: (_) => Hisab(), // Error: The parameter hisabDate is required
),
],
Naturally, I get an error that I need to pass parameters. But of course, I haven't got the items from the firestore yet. I think that the way to handle this is by
- creating an empty constructor.
- Use that empty constructor in MultiProvider.
- Change the current constructor to fromMap constructor.
- Use the map constructor in the FutureBuilder that consumes the firestore items.
- [Maybe] add notifyListeners() in the constructor.
Is my thinking correct? If not, how to rectify it?
Thank you in advance.