一、分页的实现与使用
class Pagination(object): """ 自定义分页 """ def __init__(self,current_page,total_count,base_url,params,per_page_count=10,max_pager_count=11): try: current_page = int(current_page) except Exception as e: current_page = 1 if current_page <=0: current_page = 1 self.current_page = current_page # 数据总条数 self.total_count = total_count # 每页显示10条数据 self.per_page_count = per_page_count # 页面上应该显示的最大页码 max_page_num, div = divmod(total_count, per_page_count) if div: max_page_num += 1 self.max_page_num = max_page_num # 页面上默认显示11个页码(当前页在中间) self.max_pager_count = max_pager_count self.half_max_pager_count = int((max_pager_count - 1) / 2) # URL前缀 self.base_url = base_url # request.GET import copy params = copy.deepcopy(params) params._mutable = True # 包含当前列表页面所有的搜索条件 # {source:[2,], status:[2], gender:[2],consultant:[1],page:[1]} # self.params[page] = 8 # self.params.urlencode() # source=2&status=2&gender=2&consultant=1&page=8 # href="/hosts/?source=2&status=2&gender=2&consultant=1&page=8" # href="%s?%s" %(self.base_url,self.params.urlencode()) self.params = params @property def start(self): return (self.current_page - 1) * self.per_page_count @property def end(self): return self.current_page * self.per_page_count def page_html(self): # 如果总页数 <= 11 if self.max_page_num <= self.max_pager_count: pager_start = 1 pager_end = self.max_page_num # 如果总页数 > 11 else: # 如果当前页 <= 5 if self.current_page <= self.half_max_pager_count: pager_start = 1 pager_end = self.max_pager_count else: # 当前页 + 5 > 总页码 if (self.current_page + self.half_max_pager_count) > self.max_page_num: pager_end = self.max_page_num pager_start = self.max_page_num - self.max_pager_count + 1 #倒这数11个 else: pager_start = self.current_page - self.half_max_pager_count pager_end = self.current_page + self.half_max_pager_count page_html_list = [] # {source:[2,], status:[2], gender:[2],consultant:[1],page:[1]} # 首页 self.params[‘page‘] = 1 first_page = ‘<li><a href="%s?%s">首页</a></li>‘ % (self.base_url,self.params.urlencode(),) page_html_list.append(first_page)
# 上一页 self.params["page"] = self.current_page - 1 if self.params["page"] < 1: pervious_page = ‘<li class="disabled"><a href="%s?%s" aria-label="Previous">上一页</span></a></li>‘ % ( self.base_url, self.params.urlencode()) else: pervious_page = ‘<li><a href = "%s?%s" aria-label = "Previous" >上一页</span></a></li>‘ % ( self.base_url, self.params.urlencode()) page_html_list.append(pervious_page)
# 中间页码 for i in range(pager_start, pager_end + 1): self.params[‘page‘] = i if i == self.current_page: temp = ‘<li class="active"><a href="%s?%s">%s</a></li>‘ % (self.base_url,self.params.urlencode(), i,) else: temp = ‘<li><a href="%s?%s">%s</a></li>‘ % (self.base_url,self.params.urlencode(), i,) page_html_list.append(temp) # 下一页 self.params["page"] = self.current_page + 1 if self.params["page"] > self.max_page_num: self.params["page"] = self.current_page next_page = ‘<li class="disabled"><a href = "%s?%s" aria-label = "Next">下一页</span></a></li >‘ % ( self.base_url, self.params.urlencode()) else: next_page = ‘<li><a href = "%s?%s" aria-label = "Next">下一页</span></a></li>‘ % ( self.base_url, self.params.urlencode()) page_html_list.append(next_page) # 尾页 self.params[‘page‘] = self.max_page_num last_page = ‘<li><a href="%s?%s">尾页</a></li>‘ % (self.base_url, self.params.urlencode(),) page_html_list.append(last_page) return ‘‘.join(page_html_list)
二、使用
""" 自定义分页组件的使用方法: pager_obj = Pagination(request.GET.get(‘page‘,1),len(HOST_LIST),request.path_info,request.GET) host_list = HOST_LIST[pager_obj.start:pager_obj.end] html = pager_obj.page_html() return render(request,‘hosts.html‘,{‘host_list‘:host_list,"page_html":html}) """
三、批量查数据
#批量创建数据 # booklist = [] # for i in range(100): # booklist.append(models.Book(name="book" + str(i), price=20 + i * i)) # # models.Book.objects.bulk_create(booklist)