Django如何自定义分页

本文实例为大家分享了Django自定义分页的具体代码，供大家参考，具体内容如下

稳扎稳打版

def book(request):
 # 从URL取参数（访问的页码）
 page_num = request.GET.get("page")
 try:
 # 将取出的page转换为int类型
 page_num = int(page_num)
 except Exception as e:
 # 当输入的页码不是正经数字的时候 默认返回第一页的数据
 page_num = 1

 # 数据库总数据是多少条
 total_count = models.Book.objects.all().count()

 # 每一页显示多少条数据
 per_page = 10

 # 总共需要多少页码来展示
 total_page, m = divmod(total_count, per_page)
 if m:
 total_page += 1

 # 如果输入的页码数超过了最大的页码数，默认返回最后一页
 if page_num > total_page:
 page_num = total_page

 # 定义两个变量从哪里开始到哪里结束
 data_start = (page_num - 1) * 10
 data_end = page_num * 10

 # 页面上总共展示多少页码
 max_page = 11
 if total_page < max_page:
 max_page = total_page

 # 把从URL中获取的page_num 当做是显示页面的中间值， 那么展示的便是当前page_num 的前五页和后后五页
 half_max_page = max_page // 2
 # 根据展示的总页码算出页面上展示的页码从哪儿开始
 page_start = page_num - half_max_page
 # 根据展示的总页码算出页面上展示的页码到哪儿结束
 page_end = page_num + half_max_page

 # 如果当前页减一半 比1还小, 不然页面上会显示负数的页码
 if page_start <= 1:
 page_start = 1
 page_end = max_page
 # 如果 当前页 加 一半 比总页码数还大， 不然页面上会显示比总页码还大的多余页码
 if page_end >= total_page:
 page_end = total_page
 page_start = total_page - max_page + 1

 # 从数据库取值， 并按照起始数据到结束数据展示
 all_book = models.Book.objects.all()[data_start:data_end]


 # 自己拼接分页的HTML代码
 html_str_list = []

 # # 加上首页
 html_str_list.append('<li><a href="/book/?page=1" rel="external nofollow" >首页</a></li>')

 # 断一下 如果是第一页，就没有上一页
 if page_num <= 1:
 html_str_list.append('<li class="disabled"><a href="#" rel="external nofollow" rel="external nofollow" ><span aria-hidden="true">&laquo;</span></a></li>')
 else:
 # 不是第一页，就加一个上一页的标签
 html_str_list.append('<li><a href="/book/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><span aria-hidden="true">&laquo;</span></a></li>'.format(page_num - 1))

 for i in range(page_start, page_end + 1):
 # 如果是当前页就加一个active样式类
 if i == page_num:
  tmp = '<li class="active"><a href="/book/?page={0}" rel="external nofollow" rel="external nofollow" >{0}</a></li>'.format(i)
 else:
  tmp = '<li><a href="/book/?page={0}" rel="external nofollow" rel="external nofollow" >{0}</a></li>'.format(i)

 html_str_list.append(tmp)

 # 判断，如果是最后一页，就没有下一页
 if page_num >= total_page:
 html_str_list.append('<li class="disabled"><a href="#" rel="external nofollow" rel="external nofollow" ><span aria-hidden="true">&raquo;</span></a></li>')
 else:
 # 不是最后一页， 就加一个下一页标签
 html_str_list.append('<li><a href="/book/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><span aria-hidden="true">&raquo;</span></a></li>'.format(page_num + 1))

 # 加上尾页
 html_str_list.append('<li><a href="/book/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" >尾页</a></li>'.format(total_page))

 page_html = "".join(html_str_list)
 return render(request, "book.html", {"all_book":all_book, "page_html":page_html})

book.html

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>书籍列表</title>
 <link rel="stylesheet" href="/static/bootstrap/css/bootstrap.min.css">
</head>
<body>
<div class="container">
<table class="table table-bordered">
 <thead>
 <tr>
  <th>序列号</th>
  <th>ID值</th>
  <th>书名</th>
  <th>时间</th>
 </tr>
 {% for book in all_book %}
 <tr>
  <td>{{ forloop.counter }}</td>
  <td>{{ book.id }}</td>
  <td>{{ book.name }}</td>
  <td>{{ book.date }}</td>
 </tr>
 {% endfor %}
 </thead>
</table>
<nav aria-label="Page navigation">
 <ul class="pagination">
 {{ page_html|safe }}
 </ul>
</nav>
</div>
</body>
</html>

封装保存版

封装保存版

class Page(object):
 def __init__(self, page_num, total_count, url_prefix, per_page=10, max_page=11):
 """
 :param page_num: 当前页码数
 :param total_count: 数据总数
 :param url_prefix: a标签href的前缀
 :param per_page: 每页显示多少条数据
 :param max_page: 页面上最多显示几个页码
 """
 self.url_prefix = url_prefix
 self.max_page = max_page
 # 总共需要多少页码来展示
 total_page, m = divmod(total_count, per_page)
 if m:
  total_page += 1
 self.total_page = total_page

 try:
  # 将取出的page转换为int类型
  page_num = int(page_num)
 except Exception as e:
  # 当输入的页码不是正经数字的时候 默认返回第一页的数据
  page_num = 1
 # 如果输入的页码数超过了最大的页码数，默认返回最后一页
 if page_num > total_page:
  page_num = total_page
 self.page_num = page_num

 # 定义两个变量保存数据从哪儿取到哪儿
 self.data_start = (page_num - 1) * 10
 self.data_end = page_num * 10

 # 页面上总共展示多少页码
 if total_page < self.max_page:
  self.max_page = total_page

 half_max_page = self.max_page // 2
 # 页面上展示的页码从哪儿开始
 page_start = page_num - half_max_page
 # 页面上展示的页码到哪儿结束
 page_end = page_num + half_max_page
 # 如果当前页减一半 比1还小, 不然页面上会显示负数的页码
 if page_start <= 1:
  page_start = 1
  page_end = self.max_page
 # 如果 当前页 加 一半 比总页码数还大， 不然页面上会显示比总页码还大的多余页码
 if page_end >= total_page:
  page_end = total_page
  page_start = total_page - self.max_page + 1
 self.page_start = page_start
 self.page_end = page_end

 @property
 def start(self):
 return self.data_start

 @property
 def end(self):
 return self.data_end

 def page_html(self):
 # 自己拼接分页的HTML代码
 html_str_list = []
 # # 加上首页
 html_str_list.append('<li><a href="{}?page=1">首页</a></li>'.format(self.url_prefix))
 # 断一下 如果是第一页，就没有上一页
 if self.page_num <= 1:
  html_str_list.append('<li class="disabled"><a href="#"><span aria-hidden="true">&laquo;</span></a></li>')
 else:
  # 不是第一页，就加一个上一页的标签
  html_str_list.append('<li><a href="{}?page={}"><span aria-hidden="true">&laquo;</span></a></li>'.format(self.url_prefix, self.page_num - 1))

 for i in range(self.page_start, self.page_end + 1):
  # 如果是当前页就加一个active样式类
  if i == self.page_num:
  tmp = '<li class="active"><a href="{0}?page={1}">{1}</a></li>'.format(self.url_prefix, i)
  else:
  tmp = '<li><a href="{0}?page={1}">{1}</a></li>'.format(self.url_prefix, i)

  html_str_list.append(tmp)

 # 判断，如果是最后一页，就没有下一页
 if self.page_num >= self.total_page:
  html_str_list.append('<li class="disabled"><a href="#"><span aria-hidden="true">&raquo;</span></a></li>')
 else:
  # 不是最后一页， 就加一个下一页标签
  html_str_list.append('<li><a href="{}?page={}"><span aria-hidden="true">&raquo;</span></a></li>'.format(self.url_prefix, self.page_num + 1))

 # 加上尾页
 html_str_list.append('<li><a href="{}?page={}">尾页</a></li>'.format(self.url_prefix, self.total_page))

 page_html = "".join(html_str_list)
 return page_html

封装版使用指南

def publisher(request):
 page_num = request.GET.get("page")
 total_count = models.Publisher.objects.all().count()
 # 调用封装的Page类，传入相应的参数
 page_obj = Page(page_num, total_count, url_prefix="/publisher/", per_page=10, max_page=11)
 all_publisher = models.Publisher.objects.all()[page_obj.start:page_obj.end]
 page_html = page_obj.page_html()
 return render(request, "publisher.html", {"publisher": all_publisher, "page_html": page_html})

封装版对应的HTML参考

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>图书列表</title>
 <link rel="stylesheet" href="/static/bootstrap/css/bootstrap.min.css">
</head>
<body>
<div class="container">
 <table class="table table-bordered">
 <thead>
 <tr>
  <td>序列号</td>
  <td>ID值</td>
  <td>出版社</td>
  <td>时间</td>
 </tr>
 </thead>
 <tbody>
 {% for pub in publisher %}
  <tr>
  <th>{{ forloop.counter }}</th>
  <th>{{ pub.id }}</th>
  <th>{{ pub.name }}</th>
  <th>{{ pub.date }}</th>
  </tr>
 {% endfor %}
 </tbody>
 </table>
 <nav aria-label="Page navigation">
 <ul class="pagination">
  {{ page_html|safe }}
 </ul>
 </nav>
</div>
</body>
</html>

效果图如下：

频道导航

Django如何自定义分页

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