Add some select_related() magic

Made obvious when poking around with the Django debug toolbar.

Signed-off-by: Dan McGee <dan@archlinux.org>

packages/utils.py

@@ -104,7 +104,7 @@ def get_differences_info(arch_a, arch_b):
         # column A will always have a value, column B might be NULL
         to_fetch.append(row[0])
     # fetch all of the necessary packages
-    pkgs = Package.objects.in_bulk(to_fetch)
+    pkgs = Package.objects.select_related('arch', 'repo').in_bulk(to_fetch)
     # now build a list of tuples containing differences
     differences = []
     for row in results:

public/views.py

@@ -43,7 +43,7 @@ def donate(request):
     return direct_to_template(request, 'public/donate.html', context)
 
 def download(request):
-    qset = MirrorUrl.objects.filter(
+    qset = MirrorUrl.objects.select_related('mirror', 'protocol').filter(
             Q(protocol__protocol__iexact='HTTP') | Q(protocol__protocol__iexact='FTP'),
             mirror__public=True, mirror__active=True, mirror__isos=True
     )