Python--django实现分页功能_python django 分页

1.html测试数据

{% extends 'crm_/main_table.html' %}
{% block css %}
    <style>
        th {
            text-align: center;
        }
    </style>
{% endblock %}
{% block table_ %}
    <div class="col-sm-9 col-sm-offset-3 col-md-10 col-md-offset-2 main">
        <div class="table-responsive text-center">
            <table class="table table-striped table-hover table-bordered main">
                <thead>
                <tr>
                    <th>#</th>
                    <th>称号</th>
                </tr>
                </thead>
                <tbody>
                {% for l in ls %}
                    <tr>
                        <td>{{ forloop.counter }}</td>
                        <td>{{ l.name }}</td>
                        <td>{{ l.pwd }}</td>
                    </tr>
                {% endfor %}
 
                </tbody>
            </table>
        </div>
 
 
        <nav aria-label="Page navigation">
            <ul class="pagination">
                {{ st_pr }}
                {{ pads }}
                {{ st_en }}
            </ul>
        </nav>
    </div>
 
 
{% endblock %}
 

2.封装的分页功能

'''
分页器
'''
from django.utils.safestring import mark_safe
 
 
class Pagination:
	def __init__(self, request, all_data, pag_data=10, max_pad=11):
		# 基本的URL
		self.base_url = request.path_info
		# 第一次返回时没有id或则是你输入的id不存在
		try:
			self.current_pad = int(request.GET.get('id'))
		except Exception as e:
			self.current_pad = 1
		ls = [{'name': 'alex{0}'.format(i), 'pwd': 'dsb{0}'.format(i)} for i in range(1, 302)]
 
		# 最多显示的分页个数
		self.max_pad = max_pad
		half_pad = self.max_pad // 2
 
		# 定义你想要显示的数据
		self.pag_data = pag_data
		# 拿到总数据数
		self.all_data = all_data
		# 用divmod内置函数,取到你要分的页数
		self.pads, pad_y = divmod(self.all_data, self.pag_data)
		if pad_y:
			self.pads += 1
 
			# 定义分页的开始位置和结束位置
			if self.current_pad <= half_pad:
				self.start_pad = 1
				self.end_pad = self.max_pad
			elif self.current_pad >= self.pads - half_pad:
				self.start_pad = self.pads - self.max_pad + 1
				self.end_pad = self.pads + 1
			else:
				self.start_pad = self.current_pad - half_pad
				self.end_pad = self.current_pad + half_pad
			'''
				1   1   10
				2   10  20
				3   20  30
			'''
			# 如果你的总页数小于你定义最大显示,改变它的开始和结束的位置
			if self.pads <= self.max_pad:
				self.start_pad = 1
				self.end_pad = self.pads + 1
 
	@property
	def StartPage(self):
		return (self.current_pad - 1) * 10
 
	@property
	def EndPage(self):
		return self.current_pad * 10
 
	def ActivePage(self):
		# 把前端代码拿过来,最后用""字符串拼接,然后再用mark_safe给标签过滤
		lst = []
		for i in range(self.start_pad, self.end_pad):
			if i == self.current_pad:
				st = '<li class="active"><a href="/pad/?id={0}">{0}</a></li>'.format(i)
			else:
				st = '<li><a href="/pad/?id={0}">{0}</a></li>'.format(i)
			lst.append(st)
		str_ls = mark_safe("".join(lst))
		return str_ls
 
	def PrePage(self):
		# 上一页
		if self.current_pad <= 1:
			st_pr = '<li class="disabled"><span aria-hidden="true">&laquo;</span></li>'
		else:
			st_pr = '<li><a href="/pad/?id={}" aria-label="Previous">' \
					'<span aria-hidden="true">&laquo;</span></a></li>'.format(
				self.current_pad - 1)
		st_pr = mark_safe(st_pr)
		return st_pr
 
	def NextPage(self):
		# 下一页
		if self.current_pad >= self.pads:
			st_en = '<li class="disabled"><span aria-hidden="true">&raquo;</span></li>'
		else:
			st_en = '<li><a href="/pad/?id={}" aria-label="Next"><span aria-hidden="true">&raquo;</span></a></li>'.format(
				self.current_pad + 1)
		st_en = mark_safe(st_en)
		return st_en

3.view文件中调用:

user = [{'name': 'alex{}'.format(i), 'pwd': 'alexdsb{}'.format(i)} for i in range(1, 302)]
def pad(request):
	obj = Pagination(request, len(user))
	return render(request, 'paddingex.html', {
		'ls': user[obj.StartPage:obj.EndPage],
		'pads': obj.ActivePage(),
		'st_pr': obj.PrePage(),
		'st_en': obj.NextPage()
	})