# bug fixed: device list IndexError

2018-08-20 10:49:12 +08:00 · 2018-08-20 10:49:12 +08:00 · 9d3ffcdaf4
parent 7dfb9f9d96
commit 9d3ffcdaf4
1 changed files with 4 additions and 1 deletions
--- a/apps/counter/api/serializers.py
+++ b/apps/counter/api/serializers.py
@ -65,7 +65,10 @@ class DeviceInfoSerializer(serializers.ModelSerializer):
        return obj.online

    def get_count(self, obj):
-        self.latest = DeviceCount.objects.filter(device_id=obj.device_id).order_by('-data_time')[0]
+        try:
+            self.latest = DeviceCount.objects.filter(device_id=obj.device_id).order_by('-data_time')[0]
+        except IndexError:
+            self.latest = None
        if self.latest:
            return self.latest.count
        return 0