Django自定义分页与bootstrap分页结合

django中有自带的分页模块Paginator,想Paginator提供对象的列表，就可以提供每一页上对象的方法。

这里的话不讲解Paginator,而是自定义一个分页类来完成需求：

class Pagination(object):
"""用于Model字段值的选择"""

def __init__(self):
 pass

@classmethod
def create_pagination(self, from_name='', model_name='',
      cur_page=1, start_page_omit_symbol = '...',
      end_page_omit_symbol = '...', one_page_data_size=10,
      show_page_item_len=9):
 """通过给的model和分页参数对相关model进行分页
 Args:
  from_name: 导入模块的 from后面的参数
   from {from_name} import model_name
  mode_name: 需要导入的模块名
   from from_name import {model_name}
  cur_page: 当前显示的是第几页
  start_page_omit_symbol: 超出的页数使用怎么样的省略号(前)
   ... 2 3 4
  end_page_omit_symbol: 超出的页数使用怎么样的省略号(后)
   1 2 3 4 ...
  one_page_data_size: 每一页显示几行
  show_page_item_len: 显示几个能点击的页数
 Return:
  pagination: dict
    pagination = {
     'objs': objs, # 需要显示model数据
     'all_obj_counts': all_obj_counts, # 一共多少行数据
     'start_pos': start_pos, # 数据分页开始的数据
     'end_pos': end_pos, # 数据分页结束的数据
     'all_page': all_page, # 一共有多少页
     'cur_page': cur_page, # 当前的页码
     'pre_page': pre_page, # 上一页的页码
     'next_page': next_page, # 下一页的页码
     'page_items': page_items, 能点击的页数
     'start_page_omit_symbol': start_page_omit_symbol, # 开始的省略号
     'end_page_omit_symbol': end_page_omit_symbol, # 结束的省略号
    }
 Raise: None
 """
 # 如果没有输入导入模块需要的相关信息直接退出
 if not from_name or not model_name:
  return None

import_str = 'from {from_name} import {model_name}'.format(
          from_name = from_name,
          model_name = model_name)
 # 导入模块
 exec import_str

start_pos = (cur_page - 1) * one_page_data_size
 end_pos = start_pos + one_page_data_size

# 查找需要的model数据
 find_objs_str = ('{model_name}.objects.all()'
      '[{start_pos}:{end_pos}]'.format(
           model_name = model_name,
           start_pos = start_pos,
           end_pos = end_pos))
 objs = eval(find_objs_str)

# 计算总共的页数
 find_objs_count_str = '{model_name}.objects.count()'.format(
           model_name = model_name)
 all_obj_counts = eval(find_objs_count_str)
 all_page = all_obj_counts / one_page_data_size
 remain_obj = all_obj_counts ％ one_page_data_size
 if remain_obj > 0:
  all_page += 1

# 限制当前页不能小于1和并且大于总页数
 cur_page = 1 if cur_page < 1 else cur_page
 cur_page = all_page if cur_page > all_page else cur_page

# 获得显示页数的最小页
 start_page = cur_page - show_page_item_len / 2
 if start_page > all_page - show_page_item_len:
  start_page = all_page - show_page_item_len + 1
 start_page = 1 if start_page < 1 else start_page

# 获得显示页数的最大页
 end_page = cur_page + show_page_item_len / 2
 end_page = all_page if end_page > all_page else end_page
 if end_page < show_page_item_len and all_page > show_page_item_len:
  end_page = show_page_item_len

# 获得上一页
 pre_page = cur_page - 1
 pre_page = 1 if pre_page < 1 else pre_page

# 获得下一页
 next_page = cur_page + 1
 next_page = all_page if next_page > all_page else next_page

# 处理省略符，是否显示
 if start_page <= 1:
  start_page_omit_symbol = ''

if end_page >= all_page:
  end_page_omit_symbol = ''

# 创建能点击的展示页码
 page_items = range(start_page, end_page + 1)

pagination = {
  'objs': objs,
  'all_obj_counts': all_obj_counts,
  'start_pos': start_pos,
  'end_pos': end_pos,
  'all_page': all_page,
  'cur_page': cur_page,
  'pre_page': pre_page,
  'next_page': next_page,
  'page_items': page_items,
  'start_page_omit_symbol': start_page_omit_symbol,
  'end_page_omit_symbol': end_page_omit_symbol,
 }

return pagination

利用bootstrap的css,生成好看的html如下：

<nav aria-label="Page navigation">
<ul class="pagination">
{％ if pagination.cur_page != 1 ％}
<li><a href="?cur_page=1" rel="external nofollow" ><<</a></li>
<li>
 <a href="?cur_page={{ pagination.pre_page }}" rel="external nofollow" aria-label="Previous">
 <span aria-hidden="true">&laquo;</span>
 </a>
</li>
{％ endif ％}
{％ for page_item in pagination.page_items ％}
{％ if page_item == pagination.cur_page ％}
 <li><a href="?cur_page={{ page_item }}" rel="external nofollow" rel="external nofollow" >{{ page_item }}</a></li>
{％ else ％}
 <li><a href="?cur_page={{ page_item }}" rel="external nofollow" rel="external nofollow" >{{ page_item }}</a></li>
{％ endif ％}
{％ endfor％}
{％ if pagination.cur_page != pagination.all_page ％}
<li>
 <a href="?cur_page={{ pagination.next_page }}" rel="external nofollow" aria-label="Next">
 <span aria-hidden="true">&raquo;</span>
 </a>
</li>
<li><a href="?cur_page={{ pagination.all_page }}" rel="external nofollow" >>></a></li>
{％ endif ％}
</ul>
</nav>

view函数如下：

def blogpage(request):
 #ojt = BlogPost.object.all()
 #p = Paginator(ojt,2)
 #page_count = p.count
 #page_data = p.page(page)
 #template = 'blogpage.html'
 #info = {'page_data':page_data,'page_count':page_count}
 #return render(request,template,{'page_data':page_data,'page_count':page_count})
 try:
   cur_page = int(request.GET.get('cur_page', '1'))
 except ValueError:
   cur_page = 1

pagination = Pagination.create_pagination(
      from_name='blog.models',
      model_name='BlogPost',
      cur_page=cur_page,
      start_page_omit_symbol = '...',
      end_page_omit_symbol = '...',
      one_page_data_size=1,
      show_page_item_len=5)
 return render(request, 'blogpage.html',{'pagination':pagination})

效果图如下：