performance: compute queries for home page in context

panikweb/views.py

@@ -169,9 +169,10 @@ class Home(TemplateView):
 
     def get_context_data(self, **kwargs):
         context = super(Home, self).get_context_data(**kwargs)
-        context['newsImaged'] = NewsItem.objects.all().exclude(image__isnull=True).exclude(image__exact='').order_by('-datetime')[:3]
-        context['news'] = NewsItem.objects.all().order_by('-datetime')[:60]
-        context['emissions'] = Emission.objects.filter(archived=False).order_by('title')
+        context['newsImaged'] = list(NewsItem.objects.all().exclude(
+            image__isnull=True).exclude(image__exact='').order_by('-datetime')[:3])
+        context['news'] = list(NewsItem.objects.all().order_by('-datetime')[:60])
+        context['emissions'] = list(Emission.objects.filter(archived=False).order_by('title'))
         context['player'] = audioPlayer()
         return context