Django 分页器代码

分页器代码：

在使用到非Django内置的第三方功能或者组件代码的时候，一般情况下会创建你一个名为utils文件夹，在该文件夹对模块进行功能性划分。

utils可以创建在每个应用下。

class Pagination(object):
    def __init__(self, current_page, all_count, per_page_num=2, pager_count=11):
        """
        封装分页相关数据
        :param current_page: 当前页
        :param all_count:    数据库中的数据总条数
        :param per_page_num: 每页显示的数据条数
        :param pager_count:  最多显示的页码个数
        """
        try:
            current_page = int(current_page)
        except Exception as e:
            current_page = 1

        if current_page < 1:
            current_page = 1

        self.current_page = current_page

        self.all_count = all_count
        self.per_page_num = per_page_num

        # 总页码
        all_pager, tmp = divmod(all_count, per_page_num)
        if tmp:
            all_pager += 1
        self.all_pager = all_pager

        self.pager_count = pager_count
        self.pager_count_half = int((pager_count - 1) / 2)

    @property
    def start(self):
        return (self.current_page - 1) * self.per_page_num

    @property
    def end(self):
        return self.current_page * self.per_page_num

    def page_html(self):
        # 如果总页码 < 11个：
        if self.all_pager <= self.pager_count:
            pager_start = 1
            pager_end = self.all_pager + 1
        # 总页码  > 11
        else:
            # 当前页如果<=页面上最多显示11/2个页码
            if self.current_page <= self.pager_count_half:
                pager_start = 1
                pager_end = self.pager_count + 1

            # 当前页大于5
            else:
                # 页码翻到最后
                if (self.current_page + self.pager_count_half) > self.all_pager:
                    pager_end = self.all_pager + 1
                    pager_start = self.all_pager - self.pager_count + 1
                else:
                    pager_start = self.current_page - self.pager_count_half
                    pager_end = self.current_page + self.pager_count_half + 1

        page_html_list = []
        # 添加前面的nav和ul标签
        page_html_list.append('''
                    
                                           
                                       ''')
        return ''.join(page_html_list)

Views.py

from utils.mypage import Pagination
def pl(request):
    # 向将需要分页展示的数据查出来赋值
    book_queryset = models.Book.objects.all()
    # 当前页
    current_page = request.GET.get('page',1)
    # 数据库中的数据总条数
    all_count = book_queryset.count()
    # 1. 传值生成对象，实例化
    page_obj = Pagination(current_page=current_page,all_count=all_count)
    # 2.对总数据切片操作
    page_queryset = book_queryset[page_obj.start:page_obj.end]
    # 3.将page_queryset 传递到页面替换之前的book_queryset
    return render(request,'pl.html',locals())

前端

{% for book_obj in page_queryset %}
    
{{ book_obj.title }}
    
{% endfor %}

{{ page_obj.page_html|safe }}