自定义分页器的创建
第一步:后端配置
首先创建一个utils文件夹
在utils文件夹内创建一个py文件——mypage.py
书写代码:
class Pagination(object): def __init__(self, current_page, all_count, per_page_num=10, pager_count=7): """ 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(''' <nav aria-label='Page navigation>' <ul class='pagination'> ''') first_page = '<li><a href="?page=%s">首页</a></li>' % (1) page_html_list.append(first_page) if self.current_page <= 1: prev_page = '<li class="disabled"><a href="#">上一页</a></li>' else: prev_page = '<li><a href="?page=%s">上一页</a></li>' % (self.current_page - 1,) page_html_list.append(prev_page) for i in range(pager_start, pager_end): if i == self.current_page: temp = '<li class="active"><a href="?page=%s">%s</a></li>' % (i, i,) else: temp = '<li><a href="?page=%s">%s</a></li>' % (i, i,) page_html_list.append(temp) if self.current_page >= self.all_pager: next_page = '<li class="disabled"><a href="#">下一页</a></li>' else: next_page = '<li><a href="?page=%s">下一页</a></li>' % (self.current_page + 1,) page_html_list.append(next_page) last_page = '<li><a href="?page=%s">尾页</a></li>' % (self.all_pager,) page_html_list.append(last_page) # 尾部添加标签 page_html_list.append(''' </nav> </ul> ''') return ''.join(page_html_list)
第二步: 视图层views.py中调用
from utils.pager import Pagination current_page = request.GET.get('page', 1) 文章表_queryset = models.文章表.objects.all() all_count = book_queryset.count() # 1. 传值生成对象 page_obj = Pagination(current_page=current_page, all_count=all_count) # 2. 直接对总数据进行切片操作 page_queryset = 文章表_queryset[page_obj.start:page_obj.end] # 3. 将page_queryset传递到页面. 这就是当前所展示的页面部分 return render(request, 'xxx.html', locals())
还可以设置每一页限制的文章数量(per_page_num=)
page_obj = Pagination(current_page=request.GET.get('page', 1), all_count=文章表_queryset.count(), per_page_num=5) # per_page_num 是每页限制文章数量
page_queryset = 文章表_queryset[page_obj.start:page_obj.end]
第三步:前端配置
需要安装依赖:jQuery、bootstrap
书写代码:
{% for 文章表_obj in page_queryset %} <p>{{ 文章表_obj.title }}</p> {# 分页的内容部分 #} {% endfor %} {#利用自定义分页器直接显示分页器样式#} {{ page_obj.page_html|safe }}