add rancher statistics to inventory entries list - fix bug of login for empty string device identity

apps/pos_device/pos/api/v1/viewsets/device.py

@@ -4,12 +4,18 @@ from apps.pos_device import models as pos_models
 from rest_framework.permissions import AllowAny
 from rest_framework.decorators import action
 from rest_framework.response import Response
+from django.http.response import JsonResponse
 from common.generics import get_client_ip
 from rest_framework import viewsets
 from django.db import transaction
 from rest_framework import status
 
 
+def test_web_server(request):
+    """ testing from pos device to check server status """
+    return JsonResponse({"message": "OK"}, status=status.HTTP_200_OK)
+
+
 class POSDeviceViewSet(viewsets.ModelViewSet, POSDeviceMixin):
     device_queryset = pos_models.Device.objects.all()
     session_queryset = pos_models.Sessions.objects.all()
@@ -46,7 +52,7 @@ class POSDeviceViewSet(viewsets.ModelViewSet, POSDeviceMixin):
         organization = pos_models.Organization.objects.get(en_name=psp_name)
 
         # check if device exists
-        if 'device_identity' in request.data.keys():
+        if 'device_identity' in request.data.keys() and request.data['device_identity'] != "":
             device = self.device_queryset.filter(device_identity=request.data['device_identity']).first()
         else:
             device = self.device_queryset.filter(serial=serial).first()