django + jquery 实现二级联动

$("#id_sel").change(function(){
$.get("/browser/gettestcase?type="+cate, function(result){
//$(".form-control-select").find('[value=header]').remove();
//$(".form-control-select").selectpicker('refresh');
if(result.length > 0) {
$.each(result,function(index,value){
$(".form-control-select").append("<option value='"+value.label+"'>"+value.text+"</option>");
})
}
}
)})

def gettestcase(request):
options_list = []
cate = request.GET.get('type', 'shop')
print cate
options = TestCase.objects.filter(case_category=cate)
for case in options:
c = {}
c['label'] = case.case_name
c['text'] = case.case_name
options_list.append(c)
return HttpResponse(json.dumps(options_list), content_type='application/json')