gistfile1.py

@login_required
def backgroundview(request):
	if request.is_ajax():
		form = BackgroundModelForm(request.POST, request.FILES)
		if form.is_valid():
			try:
				g = BackgroundModel.objects.get(user=request.user)
			except BackgroundModel.DoesNotExist:
				data = form.save(commit=False)
				data.user = request.user
				data.save()
			else:
				if g.tmpbg != '' and g.tmpbg != g.background:
					image_path = os.path.join(settings.MEDIA_ROOT, str(g.tmpbg))
					try:
						os.unlink(image_path)
					except:
						pass
				data = BackgroundModelForm(request.POST, request.FILES, instance=g).save()
			return HttpResponse(data.tmpbg.url)
	else:
		try:
			g = BackgroundModel.objects.get(user=request.user)
		except BackgroundModel.DoesNotExist:
			pass
		else:
			if g.tmpbg != '' and g.tmpbg != g.background:
				image_path = os.path.join(settings.MEDIA_ROOT, str(g.tmpbg))
				try:
					os.unlink(image_path)
				except:
					pass
		form = BackgroundModelForm()
		return render_to_response("cover.html", {'form': form}, context_instance=RequestContext(request))