Django model. Live search

models.py

from django.db import models
from django.db.models import Q
from django.http import HttpResponse
from django.shortcuts import render_to_response
from django.template import RequestContext
from django.template.loader import render_to_string
import json



class Product(models.Model):
    categories = models.ManyToManyField(Category,
                                        related_name='products',
                                        blank=True, verbose_name=u"категории")
    related_products = models.ManyToManyField('Product',
                                        blank=True,
                                        verbose_name="связанные продукты")

    sku = models.CharField(u'артикул', max_length=128, validators=[validators.check_bad_symbols], unique=True)

    price = models.DecimalField(u'цена', max_digits=12, decimal_places=4)

    slug = models.SlugField(u'slug', max_length=80, db_index=True, unique=True)

    name = models.CharField(u'название', max_length=128)
    title = models.CharField(u'заголовок страницы (<title>)', max_length=256, blank=True)
    description = models.TextField(u'описание', blank=True)

def live_search(request, template_name="shop/livesearch_results.html"):
    q = request.GET.get("q", "")

    if q == "":
        result = json.dumps({
        "state": "failure",
    })
    else:
        query = Q(active=True) & get_query(q, ['name', 'description'])
        temp = Product.objects.filter(query)
        total = temp.count()
        products = temp[0:5]

        products = render_to_string(template_name, RequestContext(request, {
            "products": products,
            "q": q,
            "total": total,
        }))

        result = json.dumps({
            "state": "success",
            "products": products,
        })
    return HttpResponse(result, content_type='application/json')