生產工單BOM以及批號完善

app/Models/Inventory.php

@@ -9,13 +9,13 @@ class Inventory extends Model
 {
     /** @use HasFactory<\Database\Factories\InventoryFactory> */
     use HasFactory;
+    use \Illuminate\Database\Eloquent\SoftDeletes;
     use \Spatie\Activitylog\Traits\LogsActivity;
 
     protected $fillable = [
         'warehouse_id',
         'product_id',
         'quantity',
-        'safety_stock',
         'location',
         // 批號追溯欄位
         'batch_number',
@@ -121,7 +121,9 @@ class Inventory extends Model
         $dateFormatted = date('Ymd', strtotime($arrivalDate));
         $prefix = "{$productCode}-{$originCountry}-{$dateFormatted}-";
 
-        $lastBatch = static::where('batch_number', 'like', "{$prefix}%")
+        // 加入 withTrashed() 確保流水號不會撞到已刪除的紀錄
+        $lastBatch = static::withTrashed()
+            ->where('batch_number', 'like', "{$prefix}%")
             ->orderByDesc('batch_number')
             ->first();