Django自带分页

  1. from django.core.paginator import Paginator, Page
  3. users = models.UserInfo.objects.all()
  4. paginator = Paginator(users, 10)
  5. """
  6. per_pate:  每页显示条目数量
  7. count:     数据总个数
  8. num_pages: 总页数
  9. page_range:总页数的索引范围
  10. page:      page对象
  11. """
  12. posts = paginator.page(current_page)  # current_page 当前页的页数
  13. """
  14. has_next                是否有下一页
  15. next_page_number        下一页页码
  16. has_previous            是否有上一页
  17. previous_page_number    上一页页码
  18. object_list             当前页的数据
  19. number                  当前页
  20. paginator               paginator对象
  21. """
  23. return render('usres.html', {'posts': posts})

自定义分页

  1. class PageInfo:
  2.     def __init__(self, current_page, all_count, per_page, base_url, show_page=9):
  3.         """
  4.         :param current_page: 当前页数
  5.         :param all_count: 数据库总行数
  6.         :param per_page:  每页显示行数
  7.         :param base_url:  基础url
  8.         :param show_page: 最多显示页码个数
  9.         """
  10.         try:
  11.             self.current_page = int(current_page)
  12.         except Exception as e:
  13.             self.current_page = 1
  14.         self.all_count = all_count
  15.         self.per_apge = per_page
  16.         self.all_page, n2 = divmod(self.all_count, self.per_apge)
  17.         if n2 > 0:
  18.             self.all_page += 1
  19.         self.show_page = show_page
  20.         self.base_url = base_url
  22.     @property
  23.     def start(self):
  24.         """
  25.         当前页数据库起始位置
  26.         :return:
  27.         """
  28.         return (self.current_page - 1) * self.per_apge
  30.     @property
  31.     def end(self):
  32.         """
  33.         当前页数据库结束位置
  34.         :return:
  35.         """
  36.         return self.current_page * self.per_apge
  38.     def pager(self):
  39.         page_list = []
  40.         # 计算显示页号的起始页号和终止页号
  41.         if self.all_page <= self.show_page:
  42.             # 当总页数小于要显示的页数
  43.             page_start = 1
  44.             page_end = self.all_page + 1
  45.         else:  # 总页数大于要显示的页数
  46.             half = (self.show_page-1) // 2  # 当前页在中间时前后显示的页的数量
  47.             if self.current_page <= half:
  48.                 # 当前页小于中间位置时 起始页为1 终止页为show_page
  49.                 page_start = 1
  50.                 page_end = self.show_page + 1
  51.             elif self.current_page+half > self.all_page:
  52.                 # 当前页+右边显示数量 > 总页数是
  53.                 page_end = self.all_page + 1
  54.                 page_start = page_end - self.show_page
  55.             else:
  56.                 page_start = self.current_page - half
  57.                 page_end = self.current_page + half + 1
  58.         # 上一页按钮
  59.         if self.current_page > 1:
  60.             home = "<li><a href='%s?page=1'>首页</a></li>" % self.base_url
  61.             prev = "<li><a href='%s?page=%s'>上一页</a></li>" % (self.base_url, self.current_page-1)
  62.         else:
  63.             home = "<li class='disabled'><a>首页</a></li>"
  64.             prev = "<li class='disabled'><a>上一页</a></li>"
  65.         page_list.append(home)
  66.         page_list.append(prev)
  67.         # 页码显示
  68.         for i in range(page_start, page_end):
  69.             if i == self.current_page:
  70.                 temp = "<li class='active'><a>%s</a></li>" % i
  71.             else:
  72.                 temp = "<li><a href='%s?page=%s'>%s</a></li>" % (self.base_url, i, i)
  73.             page_list.append(temp)
  74.         # 下一页
  75.         if self.current_page < self.all_page:
  76.             nex = "<li><a href='%s?page=%s'>下一页</a></li>" % (self.base_url, self.current_page+1)
  77.             trailer = "<li><a href='%s?page=%s'>尾页</a></li>" % (self.base_url, self.all_page)
  78.         else:
  79.             nex = "<li class='disabled'><a>下一页</a></li>"
  80.             trailer = "<li class='disabled'><a>尾页</a></li>"
  81.         page_list.append(nex)
  82.         page_list.append(trailer)
  83.         return ''.join(page_list)