Add signup counts to /charts/ API

apiserver/apiserver/api/serializers.py

@@ -422,6 +422,16 @@ class MemberCountSerializer(serializers.ModelSerializer):
         model = models.StatsMemberCount
         fields = '__all__'
 
+class SignupCountSerializer(serializers.ModelSerializer):
+    month = serializers.SerializerMethodField()
+
+    class Meta:
+        model = models.StatsSignupCount
+        fields = '__all__'
+
+    def get_month(self, obj):
+        return str(obj.month)[:7]
+
 
 class HistoryChangeSerializer(serializers.ModelSerializer):
     class Meta:

apiserver/apiserver/api/views.py

@@ -390,6 +390,11 @@ class MemberCountViewSet(Base, List):
     queryset = models.StatsMemberCount.objects.all()
     serializer_class = serializers.MemberCountSerializer
 
+class SignupCountViewSet(Base, List):
+    pagination_class = None
+    queryset = models.StatsSignupCount.objects.order_by('-month')[:16][::-1]
+    serializer_class = serializers.SignupCountSerializer
+
 
 class BackupView(views.APIView):
     def get(self, request):

apiserver/apiserver/urls.py

@@ -20,6 +20,7 @@ router.register(r'sessions', views.SessionViewSet, basename='session')
 router.register(r'training', views.TrainingViewSet, basename='training')
 router.register(r'transactions', views.TransactionViewSet, basename='transaction')
 router.register(r'charts/membercount', views.MemberCountViewSet, basename='membercount')
+router.register(r'charts/signupcount', views.SignupCountViewSet, basename='signupcount')
 #router.register(r'me', views.FullMemberView, basename='fullmember')
 #router.register(r'registration', views.RegistrationViewSet, basename='register')