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">«</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">»</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：