patch prikaži stranicu servisnih zapisa sa SN dizalice

backend/modules/fleet/serializers.py

@@ -207,12 +207,13 @@ class VehicleServiceRecordSerializer(serializers.ModelSerializer):
     performed_by_name = serializers.SerializerMethodField()
     vehicle_registration = serializers.SerializerMethodField()
     task_label = serializers.SerializerMethodField()
+    crane_serial_number = serializers.SerializerMethodField()
 
     class Meta:
         model = VehicleServiceRecord
         fields = [
             'id', 'vehicle', 'crane', 'vehicle_registration', 'crane_registration',
-            'task', 'task_label',
+            'task', 'task_label', 'crane_serial_number',
             'performed_by', 'performed_by_name',
             'service_title', 'description', 'parts', 'cost',
             'service_date', 'mileage', 'next_service_due_at',
@@ -261,6 +262,12 @@ class VehicleServiceRecordSerializer(serializers.ModelSerializer):
             return None
         return obj.task.title
 
+    def get_crane_serial_number(self, obj):
+        # Provjeri je li povezano vozilo/dizalica postoji i vrati serijski broj
+        if hasattr(obj, 'vehicle') and obj.vehicle:
+            return getattr(obj.vehicle, 'crane_serial_number', None)
+        return None
+
     def create(self, validated_data):
         request = self.context.get('request')
         user = getattr(request, 'user', None)