Django当中自己定义写一个分页器
在python当中自己写一个分页器，而不是直接运用Django中的分页器组件。
1.py
1 """ 2 分页组件 3 """ 4 5 6 class Pagination(object): 7 def __init__(self, current_page, all_count, base_url, query_params, per_page=20, pager_page_count=11): 8 """ 9 分页初始化 10 :param current_page: 当前页码 11 :param per_page: 每页显示数据条数 12 :param all_count: 数据库中总条数 13 :param base_url: 基础URL 14 :param query_params: QueryDict对象，内部含所有当前URL的原条件 15 :param pager_page_count: 页面上最多显示的页码数量 16 """ 17 self.base_url = base_url 18 try: 19 self.current_page = int(current_page) 20 if self.current_page <= 0: 21 raise Exception() 22 except Exception as e: 23 self.current_page = 1 24 self.query_params = query_params 25 self.per_page = per_page 26 self.all_count = all_count 27 self.pager_page_count = pager_page_count 28 pager_count, b = divmod(all_count, per_page) 29 if b != 0: 30 pager_count += 1 31 self.pager_count = pager_count 32 33 half_pager_page_count = int(pager_page_count / 2) 34 self.half_pager_page_count = half_pager_page_count 35 36 @property 37 def start(self): 38 """ 39 数据获取值起始索引 40 :return: 41 """ 42 return (self.current_page - 1) * self.per_page 43 44 @property 45 def end(self): 46 """ 47 数据获取值结束索引 48 :return: 49 """ 50 return self.current_page * self.per_page 51 52 def page_html(self): 53 """ 54 生成HTML页码 55 :return: 56 """ 57 # 如果数据总页码pager_count<11 pager_page_count 58 if self.pager_count < self.pager_page_count: 59 pager_start = 1 60 pager_end = self.pager_count 61 else: 62 # 数据页码已经超过11 63 # 判断： 如果当前页 <= 5 half_pager_page_count 64 if self.current_page <= self.half_pager_page_count: 65 pager_start = 1 66 pager_end = self.pager_page_count 67 else: 68 # 如果： 当前页+5 > 总页码 69 if (self.current_page + self.half_pager_page_count) > self.pager_count: 70 pager_end = self.pager_count 71 pager_start = self.pager_count - self.pager_page_count + 1 72 else: 73 pager_start = self.current_page - self.half_pager_page_count 74 pager_end = self.current_page + self.half_pager_page_count 75 76 page_list = [] 77 78 if self.current_page <= 1: 79 prev = '<li><a href="#">上一页</a></li>' 80 else: 81 self.query_params['page'] = self.current_page - 1 82 prev = '<li><a href="%s?%s">上一页</a></li>' % (self.base_url, self.query_params.urlencode()) 83 page_list.append(prev) 84 for i in range(pager_start, pager_end + 1): 85 self.query_params['page'] = i 86 if self.current_page == i: 87 tpl = '<li class="active"><a href="%s?%s">%s</a></li>' % ( 88 self.base_url, self.query_params.urlencode(), i,) 89 else: 90 tpl = '<li><a href="%s?%s">%s</a></li>' % (self.base_url, self.query_params.urlencode(), i,) 91 page_list.append(tpl) 92 93 if self.current_page >= self.pager_count: 94 nex = '<li><a href="#">下一页</a></li>' 95 else: 96 self.query_params['page'] = self.current_page + 1 97 nex = '<li><a href="%s?%s">下一页</a></li>' % (self.base_url, self.query_params.urlencode(),) 98 page_list.append(nex) 99 page_str = "".join(page_list) 100 return page_str
后端v1.py
1 def changelist_view(): 2 data_list = self.UserInfo.objects.all() 3 per_page_count = 10 4 all_count = self.UserInfo.objects.all().count() # 计算该queryset当中对象总数 5 query_params = request.GET.copy() # 拷贝一份 去拿 page=1 6 query_params._mutable = True # 申明可以修改了 7 pager = Pagination( 8 current_page=request.GET.get('page'), # page= 2 9 all_count=all_count, 10 base_url=request.path_info, # /stark/userinfo/list/ 11 query_params =query_params, 12 per_page=per_page_count, #每页显示页数 13 ) 14 data_list = data_list[pager.start:pager.end] 15 16 return render(request,'index.html',{ 'pager':pager,})
前端index.html
<div> <nav> <ul class="pagination"> {{ pager.page_html|safe }} </ul> </nav> </div>
