1 """
2 分页组件使用示例：
3
4 obj = Pagination(request.GET.get('page',1),len(USER_LIST),request.path_info)
5 page_user_list = USER_LIST[obj.start:obj.end]
6 page_html = obj.page_html()
7
8 return render(request,'index.html',{'users':page_user_list,'page_html':page_html})
9
10
11 """
12
13
14 class Pagination(object):
15
16 def __init__(self,current_page,all_count,request,per_page_num=2,pager_count=11):
17 """
18 封装分页相关数据
19 :param current_page: 当前页
20 :param all_count: 数据库中的数据总条数
21 :param per_page_num: 每页显示的数据条数
22 :param pager_count: 最多显示的页码个数
23 """
24
25 try:
26 current_page = int(current_page)
27 except Exception as e:
28 current_page = 1
29
30 if current_page <1:
31 current_page = 1
32
33 self.current_page = current_page
34
35 self.all_count = all_count
36 self.per_page_num = per_page_num
37
38
39 # 总页码
40 all_pager, tmp = divmod(all_count, per_page_num)
41 if tmp:
42 all_pager += 1
43 self.all_pager = all_pager
44
45
46 self.pager_count = pager_count
47 self.pager_count_half = int((pager_count - 1) / 2)
48
49 # 保存搜索条件
50 import copy
51 self.params = copy.deepcopy(request.GET)
52
53 @property
54 def start(self):
55 return (self.current_page - 1) * self.per_page_num
56
57 @property
58 def end(self):
59 return self.current_page * self.per_page_num
60
61 def page_html(self):
62 # 如果总页码 < 11个：
63 if self.all_pager <= self.pager_count:
64 pager_start = 1
65 pager_end = self.all_pager + 1
66 # 总页码 > 11
67 else:
68 # 当前页如果<=页面上最多显示11/2个页码
69 if self.current_page <= self.pager_count_half:
70 pager_start = 1
71 pager_end = self.pager_count + 1
72
73 # 当前页大于5
74 else:
75 # 页码翻到最后
76 if (self.current_page + self.pager_count_half) > self.all_pager:
77 pager_end = self.all_pager + 1
78 pager_start = self.all_pager - self.pager_count + 1
79 else:
80 pager_start = self.current_page - self.pager_count_half
81 pager_end = self.current_page + self.pager_count_half + 1
82
83 page_html_list = []
84
85 first_page = '<li><a href="?page=%s">首页</a></li>' % (1,)
86 page_html_list.append(first_page)
87
88 if self.current_page <= 1:
89 prev_page = '<li class="disabled"><a href="#">上一页</a></li>'
90 else:
91 prev_page = '<li><a href="?page=%s">上一页</a></li>' % (self.current_page - 1,)
92
93 page_html_list.append(prev_page)
94
95 for i in range(pager_start, pager_end):
96 self.params['page'] = i
97 if i == self.current_page:
98 temp = '<li class="active"><a href="?%s">%s</a></li>' % (self.params.urlencode(), i,)
99 else:
100 temp = '<li><a href="?%s">%s</a></li>' % (self.params.urlencode(), i,)
101 page_html_list.append(temp)
102
103 if self.current_page >= self.all_pager:
104 next_page = '<li class="disabled"><a href="#">下一页</a></li>'
105 else:
106 next_page = '<li><a href="?page=%s">下一页</a></li>' % (self.current_page + 1,)
107 page_html_list.append(next_page)
108
109 last_page = '<li><a href="?page=%s">尾页</a></li>' % (self.all_pager,)
110 page_html_list.append(last_page)
111
112 return ''.join(page_html_list)
