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database/seeders/ProductSeeder.php

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+<?php
+
+namespace Database\Seeders;
+
+use App\Models\Category;
+use App\Models\Product;
+use Illuminate\Database\Seeder;
+
+class ProductSeeder extends Seeder
+{
+    /**
+     * Run the database seeds.
+     */
+    public function run(): void
+    {
+        // 取得分類 ID
+        $rawMaterialId = Category::where('name', '原物料')->first()->id;
+        $packagingId = Category::where('name', '包材')->first()->id;
+
+        $products = [
+            // 原物料
+            [
+                'code' => 'RM001',
+                'name' => '二砂糖',
+                'category_id' => $rawMaterialId,
+                'brand' => '台糖',
+                'specification' => '業務用 50kg/袋',
+                'base_unit' => 'g',
+                'large_unit' => '袋',
+                'conversion_rate' => 50000,
+                'purchase_unit' => '袋',
+            ],
+            [
+                'code' => 'RM002',
+                'name' => '錫蘭紅茶',
+                'category_id' => $rawMaterialId,
+                'brand' => '天仁',
+                'specification' => '特級茶葉',
+                'base_unit' => 'g',
+                'large_unit' => '箱',
+                'conversion_rate' => 30000, // 假設一箱 30kg
+                'purchase_unit' => '箱',
+            ],
+            [
+                'code' => 'RM003',
+                'name' => '鮮乳',
+                'category_id' => $rawMaterialId,
+                'brand' => '光泉',
+                'specification' => '業務用鮮乳 1公升',
+                'base_unit' => 'ml',
+                'large_unit' => '瓶',
+                'conversion_rate' => 960, // 960ml
+                'purchase_unit' => '瓶',
+            ],
+             // 包材
+            [
+                'code' => 'PC001',
+                'name' => 'PP飲料杯 700cc',
+                'category_id' => $packagingId,
+                'brand' => '南亞',
+                'specification' => '透明, 95口徑',
+                'base_unit' => '個',
+                'large_unit' => '箱',
+                'conversion_rate' => 1000, // 1箱1000個
+                'purchase_unit' => '箱',
+            ],
+             [
+                'code' => 'PC002',
+                'name' => '粗吸管',
+                'category_id' => $packagingId,
+                'brand' => '',
+                'specification' => '獨立包裝, 12mm',
+                'base_unit' => '支',
+                'large_unit' => '包',
+                'conversion_rate' => 100, // 1包100支
+                'purchase_unit' => '箱', // 假設採購單位是箱，這裡可能需要邏輯調整，但先跟著轉換率
+            ],
+        ];
+
+        foreach ($products as $product) {
+            // 使用 firstOrCreate 避免重複建立
+            Product::firstOrCreate(['code' => $product['code']], $product);
+        }
+
+        // 額外隨機建立 25 筆商品以測試分頁
+        Product::factory()->count(25)->create();
+    }
+}