django 单点登录思路-装饰器

def the_one(func):
    '''自定义 验唯一证在线 装饰器'''
    def check_login_status(request):
        if request.session.get('qq', None):
            try:
                hert = request.session.get('hert', None)
data=models.Users.objects.filter(qq=request.session.get('qq',None)).values('business_card').first()
                if str(hert) == str(data['business_card']):
                    return func(request)
                else:
                    return redirect('/login/')
            except:
                return redirect('/login/')
        else:
            return redirect('/login/')
    return check_login_status