django 分页

Django自带分页：

 导入：    from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger

含有两个对象可以互相调用：page对象  paginator 对象

对象方法不相同  

paginator 对象方法：

                par_page:           每页显示条目数量
                cout:                  数据总个数
                num_pages:      总页数
                page_range：   总页数的索引范围(1,100)

                page：              page对象

page对象方法：

         has_next                   是否有下一页
         next_page_number  下一页页码
         has_previous            是否有上一页
         object_list                 分页之后的数据列表
         number                    当number前页
         paginator                 paginator对象

自定显示页码

————————————————————————————————————————————————————

class CustomPaginator(Paginator):
    def __init__(self,current_page, per_pager_num,*args,**kwargs):
        # 当前页
        self.current_page = int(current_page)
        # 最多显示的页码数量 11
        self.per_pager_num = int(per_pager_num)
        super(CustomPaginator,self).__init__(*args,**kwargs)
    def pager_num_range(self):
        # 当前页
        #self.current_page
        # 最多显示的页码数量 11
        #self.per_pager_num
        # 总页数
        # self.num_pages
        if self.num_pages < self.per_pager_num:
            return range(1,self.num_pages+1)
        # 总页数特别多 5
        part = int(self.per_pager_num/2)
        if self.current_page <= part:
            return range(1,self.per_pager_num+1)
        if (self.current_page + part) > self.num_pages:
            return range(self.num_pages-self.per_pager_num+1,self.num_pages+1)
        return range(self.current_page-part,self.current_page+part+1)

def index1(request):
    current_page = request.GET.get('p')
    # Paginator对象
    paginator = CustomPaginator(current_page,7,USER_LIST, 10)
    try:
        posts = paginator.page(current_page)
    except PageNotAnInteger:
        posts = paginator.page(1)
    except EmptyPage:
        posts = paginator.page(paginator.num_pages)

    return render(request,'index1.html',{'posts':posts})

原版分页parger.html

{% if posts.has_previous %}
    上一页
{% endif  %}
{% if posts.has_next %}
下一页
{% endif %}

{% for i in posts.paginator.pager_num_range %}
    {% if i == posts.number %}
         {{ i }}
        {% else %}
        {{ i }}
    {% endif %}
{% endfor %}

 {{ posts.number }}
/ {{ posts.paginator.num_pages }}

HTML文件

{% for row in posts%}
    

        {{ row.name }}
        {{ row.age }}
    
{% endfor %}


{% include 'include/parger.html' %}

自定制分页显示

pager.py

# -*- coding:utf-8 -*-

class Pagination(object):
    def __init__(self, totalCount, currentPage,perPageItemNum=10, maxPageNum=7):
        # 数据总个数
        self.total_count = totalCount
        # 当前页
        try:
            v = int(currentPage)
            if v <= 0:
                v = 1
            self.current_page = v
        except Exception as e:
            self.current_page = 1

        # 每页显示的行数
        self.per_page_item = perPageItemNum
        # 每页最多显示页码数
        self.max_page_num = maxPageNum

    def start(self):
        return (self.current_page-1) * self.per_page_item

    def end(self):
        return self.current_page * self.per_page_item

    @property
    def num_pages(self):
        # 判断极值
        # 总页数199 每页显示
        a,b = divmod(self.total_count,self.per_page_item)
        if b == 0:
            return a
        return a+1

    # 要显示的页码
    def pager_num_range(self):
        # 当前页
        # self.current_page
        # 最多显示的页码数量 11
        # self.per_pager_num
        # 总页数
        # self.num_pages
        if self.num_pages < self.max_page_num:
            return range(1, self.num_pages + 1)
        # 总页数特别多 5
        part = int(self.max_page_num / 2)
        if self.current_page <= part:
            return range(1, self.max_page_num + 1)
        if (self.current_page + part) > self.num_pages:
            return range(self.num_pages - self.max_page_num + 1, self.num_pages + 1)
        return range(self.current_page - part, self.current_page + part + 1)

    # 返回前端页面的字符串
    def page_str(self):
        page_list = []

        first="
首页
"
        page_list.append(first)

        if self.current_page == 1:
            prev = "
上一页
"
        else:
            prev = "
上一页
" % (self.current_page - 1,)
        page_list.append(prev)

        for i in self.pager_num_range():
            if i == self.current_page:
                temp = "
%s
" % (i, i)
            else:
                temp = "
%s
" % (i, i)
            page_list.append(temp)

        if self.current_page == self.num_pages:
            nex = "
下一页
"
        else:
            nex = "
下一页
" % (self.current_page + 1,)
            page_list.append(nex)

        last = "
尾页
" % (self.num_pages,)
        page_list.append(last)

        return "".join(page_list)

views.py

def index2(request):
    # 导入自定义py文件
    from app01.pager import Pagination
    # 获取当前页
    current_page = request.GET.get('p')
    # 创建对象传入值 199总数
    page_obj = Pagination(199,current_page)
    # 切片传入值
    data_list = USER_LIST[page_obj.start():page_obj.end()]

    return render(request,'index2.html',{"data":data_list,'page_obj':page_obj})

html 文件

{% for row in data%}
    

        {{ row.name }}
        {{ row.age }}
    
{% endfor %}

    {% for i in page_obj.pager_num_range %}
        {{ i }}
    {% endfor %}
        

                {{ page_obj.page_str|safe }}