新增设备调用修改卡类型接口，优化查询流量0时为负数

Controller/UnicomCombo/UnicomComboController.py

@@ -57,6 +57,8 @@ class UnicomComboView(View):
             return self.device_add(request_dict, response)
         elif operation == 'device-status':
             return self.update_device_status(request_dict, response)
+        elif operation == 'update-card':
+            return self.update_device_card_type(request_dict, response)
         elif operation == 'xxx-sign':
             return self.get_test_sign(request_dict, response)
         else:
@@ -121,7 +123,7 @@ class UnicomComboView(View):
                 }
                 activate_flow = float(flow_details['flowTotalUsage'])
                 flow_total_usage = unicom_api.get_flow_usage_total(iccid)
-                flow = flow_total_usage - activate_flow
+                flow = 0 if flow_total_usage <= 0 else flow_total_usage - activate_flow
                 flow_details['usableFlow'] = flow_details['flowTotal'] - flow
 
                 flow_details['usableFlow'] = \
@@ -235,6 +237,33 @@ class UnicomComboView(View):
             logger.info('PC工具重置异常ICCID{}，msg={}'.format(iccid, ex))
             return response.json(177, ex)
 
+    @classmethod
+    def update_device_card_type(cls, request_dict, response):
+        """
+        修改设备卡类型(0:内置卡，1：外插卡)
+        """
+        serial_no = request_dict.get('serialNo', None)
+        time_stamp = request_dict.get('timeStamp', None)
+        sign = request_dict.get('sign', None)
+        main_card = request_dict.get('type', None)
+        if not all([serial_no, main_card, sign, time_stamp]):
+            return response.json(444)
+        try:
+            if not CommonService.check_time_stamp_token(sign, time_stamp):
+                return response.json(13)
+            now_time = int(time.time())
+            with transaction.atomic():
+                unicom_device_qs = UnicomDeviceInfo.objects.filter(serial_no=serial_no)
+                if not unicom_device_qs.exists():
+                    return response.json(173)
+                unicom_device_qs.update(main_card=int(main_card), updated_time=now_time)
+                return response.json(0)
+        except Exception as e:
+            print(e.args)
+            ex = traceback.format_exc()
+            print(ex)
+            return response.json(177, ex)
+
     @classmethod
     def get_device_info(cls, request_dict, response):
         """