Python--djangoはページング機能を実現

{% extends 'crm_/main_table.html' %}
{% block css %}
    
{% endblock %}
{% block table_ %}
    

        

            
                {% for l in ls %}
                    
                {% endfor %}

                

                

                

                    
#
                    
  
                
                
                

                        
{{ forloop.counter }}
                        
{{ l.name }}
                        
{{ l.pwd }}
                    
            
        


        
    


{% endblock %}

'''
   
'''
from django.utils.safestring import mark_safe


class Pagination:
	def __init__(self, request, all_data, pag_data=10, max_pad=11):
		#    URL
		self.base_url = request.path_info
		#         id       id   
		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)]

		#          
		self.max_pad = max_pad
		half_pad = self.max_pad // 2

		#           
		self.pag_data = pag_data
		#       
		self.all_data = all_data
		#  divmod    ,        
		self.pads, pad_y = divmod(self.all_data, self.pag_data)
		if pad_y:
			self.pads += 1

			#               
			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
			'''
			#                 ,            
			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):
		#         ,   ""     ,    mark_safe     
		lst = []
		for i in range(self.start_pad, self.end_pad):
			if i == self.current_pad:
				st = '
{0}
'.format(i)
			else:
				st = '
{0}
'.format(i)
			lst.append(st)
		str_ls = mark_safe("".join(lst))
		return str_ls

	def PrePage(self):
		#    
		if self.current_pad <= 1:
			st_pr = '
«
'
		else:
			st_pr = '
' \
'«
'.format(
				self.current_pad - 1)
		st_pr = mark_safe(st_pr)
		return st_pr

	def NextPage(self):
		#    
		if self.current_pad >= self.pads:
			st_en = '
»
'
		else:
			st_en = '
»
'.format(
				self.current_pad + 1)
		st_en = mark_safe(st_en)
		return st_en

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()
	})