# up coor

apps/counter/api/serializers.py

@@ -1,4 +1,5 @@
 import pytz
+from django.db.models import Q
 from datetime import datetime, time
 from django.db.models import Sum
 from rest_framework import serializers
@@ -43,6 +44,7 @@ class DeviceInfoSerializer(serializers.ModelSerializer):
     count = serializers.SerializerMethodField()
     signal = serializers.SerializerMethodField()
     energy = serializers.SerializerMethodField()
+    coordinate = serializers.SerializerMethodField()
     time = serializers.SerializerMethodField()
 
     class Meta:
@@ -54,6 +56,7 @@ class DeviceInfoSerializer(serializers.ModelSerializer):
             'count',
             'signal',
             'energy',
+            'coordinate',
             'time',
         ]
 
@@ -83,6 +86,14 @@ class DeviceInfoSerializer(serializers.ModelSerializer):
             return self.latest.vol
         return 0
 
+    def get_coordinate(self, obj):
+        query = DeviceCount.objects.filter(~Q(longitude=0), device_id=obj.device_id).order_by('-data_time')
+        if query:
+            q = query[0]
+            return [q.longitude, q.latitude]
+        return None
+
+
     def get_time(self, obj):
         if self.latest:
             return self.latest.data_time.strftime('%Y-%m-%d %H:%M:%S')