生產工單BOM以及批號完善

app/Http/Controllers/DashboardController.php

@@ -7,8 +7,10 @@ use App\Models\Vendor;
 use App\Models\PurchaseOrder;
 use App\Models\Warehouse;
 use App\Models\Inventory;
+use App\Models\WarehouseProductSafetyStock;
 use Inertia\Inertia;
 use Illuminate\Http\Request;
+use Illuminate\Support\Facades\DB;
 
 class DashboardController extends Controller
 {
@@ -21,15 +23,25 @@ class DashboardController extends Controller
             return redirect()->route('landlord.dashboard');
         }
 
+        // 計算低庫存數量：各商品在各倉庫的總量 < 安全庫存
+        $lowStockCount = DB::table('warehouse_product_safety_stocks as ss')
+            ->join(DB::raw('(SELECT warehouse_id, product_id, SUM(quantity) as total_qty FROM inventories WHERE deleted_at IS NULL GROUP BY warehouse_id, product_id) as inv'),
+                function ($join) {
+                    $join->on('ss.warehouse_id', '=', 'inv.warehouse_id')
+                         ->on('ss.product_id', '=', 'inv.product_id');
+                })
+            ->whereRaw('inv.total_qty <= ss.safety_stock')
+            ->count();
+
         $stats = [
             'productsCount' => Product::count(),
             'vendorsCount' => Vendor::count(),
             'purchaseOrdersCount' => PurchaseOrder::count(),
             'warehousesCount' => Warehouse::count(),
             'totalInventoryValue' => Inventory::join('products', 'inventories.product_id', '=', 'products.id')
-                ->sum('inventories.quantity'), // Simplified, maybe just sum quantities for now
+                ->sum('inventories.quantity'),
             'pendingOrdersCount' => PurchaseOrder::where('status', 'pending')->count(),
-            'lowStockCount' => Inventory::whereColumn('quantity', '<=', 'safety_stock')->count(),
+            'lowStockCount' => $lowStockCount,
         ];
 
         return Inertia::render('Dashboard', [