For random multiple classes query (ala pinterest)

Ala Pinterest

import os

from django.conf import settings
from django.shortcuts import HttpResponse
from django.template import RequestContext

from bar.models import Bar
from foo.models import Foo


def get_baz_ajax(request):
    """
    Returns a combined random list of foos and bars
    """
    if request.method == 'POST':
        page = request.POST.get('page', 1)

        foo_offset = (int(page)-1) * settings.NUM_FOO_RECORDS
        bar_offset = (int(page)-1) * settings.NUM_BAR_RECORDS

        foo = Foo.objects.filter()[foo_offset:settings.NUM_FOO_RECORDS + foo_offset]
        bar = Bar.objects.filter()[bar_offset:settings.NUM_BAR_RECORDS + bar_offset]

        baz = list(foo) + list(bar)

        # shuffle the baz to make random list
        random.shuffle(baz)

        html = render_to_string('interface/list_items.html', 
                                {'baz':baz}, 
                                RequestContext(request))

        return HttpResponse(html)