added filtering to the show list view.

program/views.py

 from django.views.generic.list import ListView
+from django.shortcuts import get_object_or_404
 
 from models import BroadcastFormat, MusicFocus, Note, Show, ShowInformation, ShowTopic
 
@@ -6,7 +7,6 @@ from datetime import datetime, timedelta
 
 class ShowListView(ListView):
     context_object_name = 'show_list'
-    model = Show
 
     def get_context_data(self, **kwargs):
         context = super(ShowListView, self).get_context_data(**kwargs)
@@ -17,7 +17,27 @@ class ShowListView(ListView):
         context['showtopic_list'] = ShowTopic.objects.all()
 
         return context
-    
+
+    def get_queryset(self):
+        if 'broadcastformat' in self.request.GET:
+            broadcastformat = get_object_or_404(BroadcastFormat, slug=self.request.GET['broadcastformat'])
+
+            return Show.objects.filter(broadcastformat=broadcastformat)
+        elif 'musicfocus' in self.request.GET:
+            musicfocus = get_object_or_404(MusicFocus, slug=self.request.GET['musicfocus'])
+
+            return Show.objects.filter(musicfocus=musicfocus)
+        elif 'showinformation' in self.request.GET:
+            showinformation = get_object_or_404(ShowInformation, slug=self.request.GET['showinformation'])
+
+            return Show.objects.filter(showinformation=showinformation)
+        elif 'showtopic' in self.request.GET:
+            showtopic = get_object_or_404(ShowTopic, slug=self.request.GET['showtopic'])
+
+            return Show.objects.filter(showtopic=showtopic)
+        else:
+            return Show.objects.all()
+
 class RecommendationsView(ListView):
     context_object_name = 'recommendations'
     template_name = 'program/recommendations.html'
@@ -26,4 +46,4 @@ class RecommendationsView(ListView):
         now = datetime.now()
         in_one_week = now + timedelta(weeks=1)
 
-        return Note.objects.filter(status=1, timeslot__start__range=(now, in_one_week))[:10]
\ No newline at end of file
+        return Note.objects.filter(status=1, timeslot__start__range=(now, in_one_week))[:10]