create stock and stock logs

app/Models/Product.php

@@ -19,4 +19,14 @@ class Product extends Model
     public function opnameDetails(){
         return $this->hasMany(OpnameDetail::class);
     }
+
+    public function stocks(){
+        return $this->hasMany(Stock::class);
+    }
+
+    // Helper method untuk mendapatkan total stock saat ini
+    public function getCurrentTotalStockAttribute()
+    {
+        return $this->stocks()->sum('quantity');
+    }
 }