Addded item code logic in get serial number

app/Http/Controllers/PdfController.php

@@ -452,19 +452,28 @@ class PdfController extends Controller
         }
 
 
-        $serialNumbers = GrMaster::where('plant_id', $plantId)
-                            ->where('gr_number', $grNumber)
-                            ->pluck('serial_number')
-                            ->toArray();
+        $grRecords = GrMaster::where('plant_id', $plantId)
+                ->where('gr_number', $grNumber)
+                ->get(['serial_number', 'item_id']);
 
-        if (empty($serialNumbers)) {
+        if (empty($grRecords )) {
             return response()->json([
                 'status_code' => 'ERROR',
                 'status_description' => 'No serial numbers found for the given GR number!'
             ], 404);
         }
 
+        // return response()->json([
+        //     'serial_numbers' => $serialNumbers
+        // ], 200);
+        $itemId = $grRecords->first()->item_id;
+
+        $itemCode = $itemId ? optional(Item::find($itemId))->code : null;
+
+        $serialNumbers = $grRecords->pluck('serial_number')->toArray();
+
         return response()->json([
+            'item_code' => $itemCode,
             'serial_numbers' => $serialNumbers
         ], 200);
     }