first commit

apps/appsetting/selector.py

@@ -0,0 +1,13 @@
+from apps.appsetting.models import City
+from django.core.cache import cache
+
+
+def get_city_list():
+    city = cache.get('city')
+
+    if city is None:
+        city = City.objects.all()
+        # 75 hour cache
+        cache.set('city', city, 60 * 60 * 72)
+
+    return city