Django的筛选功能

<li>
   <h2>机构类别</h2>
   <div class="cont">
                    <a href="?city={{ city_id }}"><span class="{% ifequal category ‘‘ %}active2{% endifequal %}">全部</span></a>

                        <a href="?ct=pxjg&city={{ city_id }}"><span class="{% ifequal category ‘pxjg‘ %}active2{% endifequal %}">培训机构</span></a>

                        <a href="?ct=gx&city={{ city_id }}"><span class="{% ifequal category ‘gx‘ %}active2{% endifequal %}">高校</span></a>

                        <a href="?ct=gr&city={{ city_id }}"><span class="{% ifequal category ‘gr‘ %}active2{% endifequal %}">个人</span></a>

   </div>
</li>
<li>
   <h2>所在地区</h2>
   <div class="more">更多</div>
   <div class="cont">
                    <a href="?ct={{ category }}"><span class="{% ifequal city_id ‘‘ %}active2{% endifequal %}">全部</span></a>
                        {% for city in all_city %}
                            <a href="?city={{ city.id }}&ct={{ category }}"><span class="{% ifequal city_id city.id|stringformat:"i" %}active2{% endifequal %}">{{ city.name }}</span></a>
                        {% endfor %}
   </div>

def get(self,request):
    #课程机构
    all_orgs = CourseOrg.objects.all()
    hot_orgs = all_orgs.order_by("-click_nums")[:3]
    #取出筛选城市
    city_id = request.GET.get(‘city‘,‘‘)
    if city_id:
        all_orgs = all_orgs.filter(city_id=int(city_id))

    #城市
    all_city = CityDict.objects.all()
    #机构类别筛选
    category = request.GET.get(‘ct‘, ‘‘)
    if category:
        all_orgs = all_orgs.filter(category=category)