iv_and/product_provider.dart

import 'package:flutter/material.dart';
import 'package:sqflite/sqflite.dart';
import 'db_helper.dart';
import 'product.dart';

class ProductProvider with ChangeNotifier {
  List<Product> _products = [];

  List<Product> get products => _products;

  Future<void> fetchProducts() async {
    final db = await DbHelper().database;
    final List<Map<String, dynamic>> maps = await db.query('products');
    _products = List.generate(maps.length, (i) {
      return Product.fromMap(maps[i]);
    });
    notifyListeners();
  }

  Future<void> addProduct(Product product) async {
    final db = await DbHelper().database;
    await db.insert('products', product.toMap());
    fetchProducts();
  }

  // 追加の CRUD メソッドを実装
}