flavourid = serializers.CharField(help_text="flavourid", required=True)
     vimid = serializers.CharField(help_text="the vim id", required=True)
     resouceid = serializers.CharField(help_text="the resouce id", required=True)
-    tenant = serializers.IntegerField(help_text="tenant", required=True)
+    tenant = serializers.IntegerField(help_text="tenant", required=True, allow_null=True)
     instid = serializers.CharField(help_text="the inst id", required=True)
     name = serializers.CharField(help_text="name", required=True)
     extraspecs = serializers.CharField(help_text="extraspecs", required=True)
-    create_time = serializers.CharField(help_text="create_time", required=True)
+    create_time = serializers.CharField(help_text="create_time", required=True, allow_null=True)
     memory = serializers.IntegerField(help_text="memory", required=True)
-    vcpu = serializers.CharField(help_text="vcpu", required=True)
+    vcpu = serializers.IntegerField(help_text="vcpu", required=True)
 
 
 class FlavorInfoSerializer(serializers.Serializer):
 
     url(r'^api/vnfres/v1/vnfs/(?P<vnfInstanceId>[0-9a-zA-Z\-\_]+)$', views.get_vnf, name='get_vnf'),
     url(r'^api/vnfres/v1/vnfs$', views.get_vnfs, name='get_vnfs'),
     url(r'^api/vnfres/v1/(?P<vnfInstanceId>[0-9a-zA-Z\-\_]+)/vms$', views.get_vms, name='get_vms'),
-    url(r'^api/vnfres/v1/(?P<vnfInstanceId>[0-9a-zA-Z\-\_]+)/flavors$', views.get_flavors, name='get_flavors'),
+    url(r'^api/vnfres/v1/(?P<vnfInstanceId>[0-9a-zA-Z\-\_]+)/flavors$', views.getFlavors.as_view(), name='get_flavors'),
     url(r'^api/vnfres/v1/(?P<vnfInstanceId>[0-9a-zA-Z\-\_]+)/networks$', views.getNetworks.as_view(), name='get_networks'),
     url(r'^api/vnfres/v1/(?P<vnfInstanceId>[0-9a-zA-Z\-\_]+)/subnets$', views.getSubnets.as_view(), name='get_subnets'),
     url(r'^api/vnfres/v1/(?P<vnfInstanceId>[0-9a-zA-Z\-\_]+)/cps$', views.getCps.as_view(), name='get_cps'),
 
 from res.pub.utils.syscomm import fun_name
 from res.pub.utils.values import ignore_case_get
 from res.resources.serializers import VolumeInfoSerializer, CpsInfoSerializer, SubnetInfoSerializer, \
-    NetworkInfoSerializer
+    NetworkInfoSerializer, FlavorInfoSerializer
 
 logger = logging.getLogger(__name__)
 
     return vms_data
 
 
-@api_view(http_method_names=['GET'])
-def get_flavors(request, *args, **kwargs):
-    logger.debug("Query all the flavors by vnfInstanceId[%s]", fun_name())
-    try:
-        vnf_inst_id = ignore_case_get(kwargs, "vnfInstanceId")
-        flavours = FlavourInstModel.objects.filter(instid=vnf_inst_id)
-        if not flavours:
-            return Response(data={'error': 'Flavours does not exist'}, status=status.HTTP_404_NOT_FOUND)
-        arr = []
-        for flavour in flavours:
-            arr.append(fill_flavours_data(flavour))
-        return Response(data={'resp_data': arr}, status=status.HTTP_200_OK)
-    except Exception as e:
-        logger.error(e.message)
-        logger.error(traceback.format_exc())
-        return Response(data={'error': 'Failed to get flavours'}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
+class getFlavors(APIView):
+    @swagger_auto_schema(
+        responses={
+            status.HTTP_200_OK: FlavorInfoSerializer(),
+            status.HTTP_404_NOT_FOUND: 'Flavours does not exist',
+            status.HTTP_500_INTERNAL_SERVER_ERROR: 'internal error'})
+    def get(self, request, vnfInstanceId):
+        logger.debug("Query all the flavors by vnfInstanceId[%s]", fun_name())
+        try:
+            flavours = FlavourInstModel.objects.filter(instid=vnfInstanceId)
+            if not flavours:
+                return Response(data={'error': 'Flavours does not exist'}, status=status.HTTP_404_NOT_FOUND)
+            arr = []
+            for flavour in flavours:
+                arr.append(fill_flavours_data(flavour))
+
+            flavorInfoSerializer = FlavorInfoSerializer(data={'resp_data': arr})
+            isValid = flavorInfoSerializer.is_valid()
+            if not isValid:
+                raise Exception(flavorInfoSerializer.errors)
+
+            return Response(data=flavorInfoSerializer.data, status=status.HTTP_200_OK)
+        except Exception as e:
+            logger.error(e.message)
+            logger.error(traceback.format_exc())
+            return Response(data={'error': 'Failed to get flavours'}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
 
 
 def fill_flavours_data(f):