Django中提示消息messages的设置

1. 引入messages模块

1 from django.contrib import messages

2. 把messages写入view中

 1 @csrf_exempt
 2 def search(request):
 3     if request.method == 'GET':
 4         bookname = request.GET.get('bookname')
 5         bookinfo = Book.objects.filter(bookname=bookname)
 6         is_staff = request.user.is_staff
 7         username = request.user.username
 8         gonggao = Gonggao.objects.all().order_by("-c_time")
 9         liuyanban_all = liuyan.objects.all().order_by("-c_time")
10         c2 = JieInfo.objects.filter(u_name=username, book_name=bookname)
11         c3 = JieInfo.objects.filter(u_name=username).count()
12         if username == '':
13             messages.error(request, '亲，请您先登录,才能使用该功能。')
14             return redirect('/')
15         else:
16             if bookname == '':
17                 messages.error(request, '亲，搜索内容不能为空哦。')
18                 return redirect('/')
19             elif c2.exists():
20                 messages.error(request, '对不起，您不能再次借阅该图书了。')
21                 return redirect('/')
22             elif c3 == 5:
23                 messages.error(request, '对不起，您将超出图书馆借阅图书数量限制。')
24                 return redirect('/')
25             else:
26                 if bookinfo.exists():
27                     return render(request, "systeam/searched.html",
28                                   {'bookinfo': bookinfo, 'username': username, 'is_staff': is_staff})
29                 else:
30                     messages.error(request, '亲，没有这本书呢。')
31                     return redirect('/')
32     else:
33         return render(request, "systeam/searched.html", {'username': username})

3. 把messages渲染到页面中

 1 {% if messages %}
 2
 3     <ul class="messages">
 4
 5     {% for message in messages %}
 6
 7
 8         <li{%if message.tags %} class="{{ message.tags }}"{% endif %}>
 9             <div class="m_title">
10                 {{ message.tags }}
11                 <a href="" id="a_tuichu">
12                     <i class="iconfont icon-fork"></i>
13                 </a>
14             </div>
15             <div id="m_box">
16                 {{ message }}
17             </div>
18             <a href="" id="a_sure">
19                 <button id="button_sure">
20                 确认
21                 </button>
22             </a>
23         </li>
24
25     {% endfor %}
26
27     </ul>
28
29     {% endif %}