74 分页器 crm用户表

主要内容:

1 分页:

views里的代码:

user = [{'name':'alex'+str(i), 'pwd': 'alexdsb'+ str(i)} for i in range(1, 302)]
from utils.pagination import Pagination
def user_list(request):
    pages = Pagination(request, len(user))
    return render(request, 'user_list.html',
                      {
                          'user_list': user[pages.start: pages.end],
                          # 'page_num': range(start_page, end_page + 1 ),
                          'html_str':pages.show_li
                      })

2 html中的代码段:

    {# 分页 #}
    <nav aria-label="Page navigation">
        <ul class="pagination">
              {{ html_str }}
        </ul>
    </nav>

3  自定义一个类分页

from django.utils.safestring import mark_safe
class Pagination:
    def __init__(self, request, total_num, line_num=10, max_page = 11 ):
        # 基本url
        self.base_url = request.path_info
        # 当前页码
        # 获取当前的页数,    解决每一页设置相应的内容
        try:
            self.current_page = int(request.GET.get('page', 1))
            if self.current_page <= 0:
                self.current_page = 1
        except Exception as e:
            self.current_page = 1
        self.page_num, more = divmod(total_num, line_num)
        if more:
            self.page_num = self.page_num + 1

        # 最多显示的页码数
        self.max_page = max_page
        half_page = max_page//2
        # 每页显示的数据条数
        self.line_num = line_num
        # 数据总量
        self.total_num = total_num
        # 当总页码数小于最大显示数, 显示总页码数
        if self.page_num <= max_page:
            self.start_page = 1
            self.end_page = self.page_num
        else:
            # 获取开始的页数, 当当前数据小于half-page时, 会出现复数的问题,所以加上if判断
            if self.current_page<=half_page:
                self.start_page = 1
                self.end_page = max_page
            elif self.current_page + half_page > self.page_num:
                self.end_page = self.page_num
                self.start_page = self.page_num - max_page
            else:
                self.start_page = self.current_page - half_page
                # 获得结束的页数
                self.end_page = self.current_page + half_page

    # 获取起始数据:
    @property
    def start(self):
        return (self.current_page - 1)*self.line_num

# 获取结束数据
    @property
    def end(self):
        return (self.current_page + 1)*self.line_num

    @property
    def show_li(self):
     #存放li标签的列表
        html_list = []
        # 添加首页和尾页
        first_li =  '<li><a href="{}?page=1">首页</a></li>'.format(self.base_url)
        html_list.append(first_li)
        # 添加前和后
        if self.current_page == 1:
            pre_li = '<li class="disabled"><a><<</a></li>'
        else:
            pre_li = '<li><a href="{1}?page={0}"><<</a></li>'.format(self.current_page - 1, self.base_url)
        html_list.append(pre_li)
        # 正常的分页内容
        for num in range( self.start_page,  self.end_page + 1):
            if self.current_page == num:
                li_html = '<li class="active"><a href="{1}?page={0}">{0}</a></li>'.format(num, self.base_url)
            else:
                li_html = '<li><a href="{1}?page={0}">{0}</a></li>'.format(num, self.base_url)
            html_list.append(li_html)
        if  self.current_page ==  self.page_num:
            next_li = '<li class="disabled"><a>>></a></li>'
        else:
            next_li =  '<li><a href="{1}?page={0}">>></a></li>'.format(self.current_page + 1, self.base_url)
        html_list.append(next_li)
        last_li = '<li><a href="{1}?page={0}">尾页</a></li>'.format(self.total_num, self.base_url)
        html_list.append(last_li)
        return mark_safe(''.join(html_list))