karma: add django rest framework

i tried to use this for datatables, but it was taking too long to get a
response, so i'm abandoning this for the moment, but the support's there
for the future

dr_botzo/karma/serializers.py

@@ -0,0 +1,12 @@
+"""Serializers for the karma objects."""
+
+from rest_framework import serializers
+
+from karma.models import KarmaKey
+
+
+class KarmaKeySerializer(serializers.ModelSerializer):
+
+    class Meta:
+        model = KarmaKey
+        fields = ('id', 'key', 'score', 'rank')

dr_botzo/karma/urls.py

@@ -1,10 +1,16 @@
 """URL patterns for the karma views."""
 
-from django.conf.urls import patterns, url
+from django.conf.urls import patterns, url, include
+from rest_framework.routers import DefaultRouter
 
-from karma.views import key_detail, index
+from karma.views import key_detail, index, KarmaKeyViewSet
+
+router = DefaultRouter()
+router.register(r'keys', KarmaKeyViewSet)
 
 urlpatterns = patterns('races.views',
     url(r'^$', index, name='karma_index'),
     url(r'^key/(?P<karma_key>.+)/', key_detail, name='karma_key_detail'),
+
+    url(r'^api/', include(router.urls)),
 )

dr_botzo/karma/views.py

@@ -3,8 +3,10 @@
 import logging
 
 from django.shortcuts import get_object_or_404, render
+from rest_framework import viewsets
 
 from karma.models import KarmaKey
+from karma.serializers import KarmaKeySerializer
 
 log = logging.getLogger('karma.views')
 
@@ -23,3 +25,11 @@ def key_detail(request, karma_key):
     entry = get_object_or_404(KarmaKey, key=karma_key.lower())
 
     return render(request, 'karma/karma_key.html', {'entry': entry, 'entry_history': entry.history(mode='date')})
+
+
+class KarmaKeyViewSet(viewsets.ReadOnlyModelViewSet):
+
+    """Provide list and detail actions for karma keys."""
+
+    queryset = KarmaKey.objects.all()
+    serializer_class = KarmaKeySerializer