python---django中自带分页类使用

请先看在学习tornado时,写的自定义分页类:思路一致;

python---自定义分页类

1.基础使用:

后台数据获取:

from django.core.paginator import Paginator,PageNotAnInteger,EmptyPage#错误判断
List_info
= [] for i in range(1000): List_info.append("news%d"%i) def get_page(req): current_page = req.GET.get('p') paginator = Paginator(List_info,10) #传入总数据和每页显示的数据
  #含有属性:
  #per_page:每页显示条数上面的10
  #count数据总数
  #num_pages:总页数
  #page_range:总页数索引范围
  #page:page对象
try: posts = paginator.page(current_page)
     #page对象含有方法:
     #has_next:判断是否有下一页
     #has_previous:判断是否有上一页
     #next_page_number:下一页页码
     #previous_page_number:上一页页码
     #number:当前页  注意:这个是属性,其他是方法,需要加上()
     #paginator:paginator对象 except PageNotAnInteger: posts
= paginator.page(1) except EmptyPage: posts = paginator.page(paginator.num_pages) #num_pages数总页数,最后一页 return render(req,'get_page.html',{'posts':posts})

前端代码:

    <div class="content">
        {% for item in posts %}
            <p>{{ item }}</p>
        {% endfor %}
    </div>
    <div>
        <span>
            {% if posts.has_previous %}  #模板中调用函数不要()
                <a href="/page.html?p={{ posts.previous_page_number }}">prev</a>
            {% endif %}
            <span class="current">
                Page {{ posts.number }} of {{ posts.paginator.num_pages }}
            </span>
            {% if posts.has_next %}
                <a href="/page.html?p={{ posts.next_page_number }}">next</a>
            {% endif %}
        </span>
    </div>

2.扩展内置分页:

类修改:

from django.core.paginator import Paginator

class CustomPagimator(Paginator):
    def __init__(self,current_page,max_page_num,*args,**kwargs):
        self.current_page = int(current_page)  #当前页  #自定义变量
        self.max_page_num = max_page_num    #可以显示多少页  #自定义变量
        super(CustomPagimator,self).__init__(*args,**kwargs)

    def page_num_range(self):
        # self.num_pages 总页数
        part_num = int(self.max_page_num/2)
        if self.num_pages <= self.max_page_num:  #先判断总页数和运行显示的页数大小
            return range(1, self.num_pages + 1)
        if self.current_page <= part_num:  #再取半分析
            return range(1,self.max_page_num+1)
        elif self.current_page+part_num>= self.num_pages:
            return range(self.num_pages-self.max_page_num,self.num_pages+1)
        else:
            return range(self.current_page - part_num, self.current_page + part_num + 1)

类调用:

List_info = []
for i in range(1000):
    List_info.append("news%d"%i)

from 模块.自定义分页类文件 import 自定义分页类CustomPagimator
def get_page(req): current_page
= req.GET.get('p') paginator = CustomPagimator(current_page=current_page, max_page_num=5,object_list=List_info,per_page=10) #传入总数据和每页显示的数据 try: posts = paginator.page(current_page) except PageNotAnInteger: posts = paginator.page(1) except EmptyPage: posts = paginator.page(paginator.num_pages) #num_pages数总页数,最后一页 page_html = paginator.page_num_range() return render(req,'get_page.html',{'posts':posts,"page_html":page_html})

前端使用:

    <div>
        <span>
            {% if posts.has_previous %}
                <a href="/page.html?p={{ posts.previous_page_number }}">prev</a>
            {% endif %}
            <span class="page">
                {% for i in page_html %}
                    <a href="/page.html?p={{ i }}">{{ i }}</a>
                {% endfor %}
            </span>
            <span class="current">
                Page {{ posts.number }} of {{ posts.paginator.num_pages }}
            </span>
            {% if posts.has_next %}
                <a href="/page.html?p={{ posts.next_page_number }}">next</a>
            {% endif %}
        </span>
    </div>

 

posted @ 2018-03-30 23:01  山上有风景  阅读(1425)  评论(0编辑  收藏  举报