main.dart

import 'dart:convert';
void main() {
 
  Cart itema = Cart(product: 'icecrea', price: '100');
  Cart itemb = Cart(product: 'tofu', price: '200');
  
  List<Cart> items = [itema, itemb];
  print(items);
  
  String itemstosavetodatabase = jsonEncode(items);
  print(itemstosavetodatabase);
  
  List<dynamic> fromdatabase = jsonDecode(itemstosavetodatabase);
  for(var item in fromdatabase) {
    print(Cart.fromJson(item));
  }
}


class Cart {
  String product;
  String price;

  Cart({this.product, this.price});

  Cart.fromJson(Map<String, dynamic> json) {
    product = json['product'];
    price = json['price'];
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    data['product'] = this.product;
    data['price'] = this.price;
    return data;
  }
}