/v1/now endpoint added

Author: mfa

feinstaub/sensors/serializers.py

@@ -131,3 +131,33 @@ class VerboseSensorDataSerializer(serializers.ModelSerializer):
     class Meta:
         model = SensorData
         fields = ('id', 'sampling_rate', 'timestamp', 'sensordatavalues', 'location', 'sensor', 'software_version')
+
+
+# ##################################################
+
+
+class NowSensorSerializer(serializers.ModelSerializer):
+    sensor_type = NestedSensorTypeSerializer()
+
+    class Meta:
+        model = Sensor
+        fields = ('id', 'pin', 'sensor_type')
+
+
+class NowSensorLocationSerializer(serializers.ModelSerializer):
+    latitude = serializers.DecimalField(max_digits=6, decimal_places=3)
+    longitude = serializers.DecimalField(max_digits=6, decimal_places=3)
+
+    class Meta:
+        model = SensorLocation
+        fields = ('id', 'latitude', 'longitude')
+
+
+class NowSerializer(serializers.ModelSerializer):
+    location = NowSensorLocationSerializer()
+    sensor = NowSensorSerializer()
+    sensordatavalues = NestedSensorDataValueSerializer(many=True)
+
+    class Meta:
+        model = SensorData
+        fields = ('id', 'sampling_rate', 'timestamp', 'sensordatavalues', 'location', 'sensor')

feinstaub/sensors/urls.py

@@ -7,6 +7,7 @@
     SensorDataView,
     SensorView,
     StatisticsView,
+    NowView,
 )
 from main.views import UsersView
 
@@ -17,6 +18,7 @@
 router.register(r'data', SensorDataView)
 router.register(r'statistics', StatisticsView, base_name='statistics')
 router.register(r'user', UsersView)
+router.register(r'now', NowView)
 
 
 urlpatterns = patterns(

feinstaub/sensors/views.py

@@ -1,6 +1,8 @@
+import datetime
 import django_filters
 from django.contrib.auth.models import User
 from django.db.models import Q
+from django.utils import timezone
 
 from rest_framework import mixins, viewsets, filters, pagination
 from rest_framework.response import Response
@@ -11,6 +13,7 @@
     NodeSerializer,
     SensorSerializer,
     VerboseSensorDataSerializer,
+    NowSerializer,
 )
 
 from .models import (
@@ -105,6 +108,20 @@ def get_queryset(self):
         return Node.objects.none()
 
 
+class NowView(mixins.ListModelMixin, viewsets.GenericViewSet):
+    """ Show all sensors active in the last 5 minutes with newest value
+    """
+    permission_classes = []
+    serializer_class = NowSerializer
+    queryset = SensorData.objects.none()
+
+    def get_queryset(self):
+#        now = timezone.now()
+        now = datetime.datetime(2016, 1, 1, 1, 1)
+        startdate = now - datetime.timedelta(minutes=5)
+        return SensorData.objects.filter(modified__range=[startdate, now])
+
+
 class StatisticsView(viewsets.ViewSet):
 
     def list(self, request):