narrators reorder action api added

apps/hadis/views_admin.py

@@ -535,3 +535,24 @@ class AdminHadisTransmitterViewSet(ModelViewSet):
         if hadis_id:
             queryset = queryset.filter(hadis_id=hadis_id)
         return queryset.order_by("order")
+
+    @action(detail=False, methods=["post"])
+    def reorder(self, request):
+        from rest_framework.decorators import action
+        from rest_framework.response import Response
+        from django.db import transaction
+
+        hadis_transmitter_ids = request.data.get("hadis_transmitter_ids", [])
+        if not hadis_transmitter_ids:
+            return Response({"error": "hadis_transmitter_ids list is required"}, status=400)
+
+        with transaction.atomic():
+            # Pass 1: Set temporary positive offset order indices to avoid duplicate key violations (>= 0)
+            for index, ht_id in enumerate(hadis_transmitter_ids):
+                HadisTransmitter.objects.filter(id=ht_id).update(order=10000 + index)
+
+            # Pass 2: Set final sequential order indices starting from 0
+            for index, ht_id in enumerate(hadis_transmitter_ids):
+                HadisTransmitter.objects.filter(id=ht_id).update(order=index)
+
+        return Response({"status": "success"})