Python CRM项目三

1.分页:

分页使用Django内置的分页模块来实现

官方的分页案例

 1 from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
 2 from django.shortcuts import render
 3 #后端
 4 def listing(request):
 5     contact_list = Contacts.objects.all()
 6     paginator = Paginator(contact_list, 25) # Show 25 contacts per page
 7 
 8     page = request.GET.get('page')
 9     try:
10         contacts = paginator.page(page)
11     except PageNotAnInteger:
12         # If page is not an integer, deliver first page.
13         contacts = paginator.page(1)
14     except EmptyPage:
15         # If page is out of range (e.g. 9999), deliver last page of results.
16         contacts = paginator.page(paginator.num_pages)
17 
18     return render(request, 'list.html', {'contacts': contacts})
19 #前端
20 % for contact in contacts %}
21     {# Each "contact" is a Contact model object. #}
22     {{ contact.full_name|upper }}<br />
23     ...
24 {% endfor %}
25 #分页组件
26 <div class="pagination">
27     <span class="step-links">
28         {% if contacts.has_previous %}
29             <a href="?page={{ contacts.previous_page_number }}">previous</a>
30         {% endif %}
31 
32         <span class="current">
33             Page {{ contacts.number }} of {{ contacts.paginator.num_pages }}.
34         </span>
35 
36         {% if contacts.has_next %}
37             <a href="?page={{ contacts.next_page_number }}">next</a>
38         {% endif %}
39     </span>
40 </div>

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