Django--分页

功能

web分页

使用

在项目中创建一个分页的class，web用到分页的地方直接用下面的function调用即可。

速查

class

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class Pager(object):     def __init__(self,current_page):         self.current_page = int(current_page)     @property     def start(self):         return (self.current_page-1) * 10     @property     def end(self):         return self.current_page * 10     def page_str(self,all_item,base_url):         all_page,div = divmod(all_item,10)  #计算分页数量，每页显示10条数据，div是余数         if div >0 :             all_page += 1         pager_list = [] #先定义成列表，最后再join成字符串传给前端         if all_page <=11:   #计算start和end             start = 1             end = all_page         else:             if self.current_page <= 6:                 start =1                 end = 12             else:                 start = self.current_page -5                 end = self.current_page +6                 if self.current_page+6 >all_page:                     start = all_page -11                     end = all_page + 1         for i in range(start,end): #生成分页的html标签，当前页变红变大显示             if i == self.current_page:                 temp = '<a style="color:red;font-size:26px;" href="%s%d">%d</a>' % (base_url,i,i)             else:                 temp = '<a href="%s%d">%d</a>' % (base_url,i,i)             pager_list.append(temp)           #上一页         if self.current_page>1: #href到当前页的上一个数字             pre_page = '<a href="%s%d">上一页</a>' %(base_url,self.current_page-1)         else:             pre_page = '<a href="javascript:void(0)">上一页</a>'   #href什么也不做         #下一页         if self.current_page >= all_page:             next_page = '<a href="javascript:void(0)">下一页</a>'         else:             next_page = '<a href="%s%d">下一页</a>'%(base_url,self.current_page+1)         pager_list.insert(0,pre_page)         pager_list.append(next_page)           #首页         if self.current_page == 1:             home_page = '<a href="javascript:void(0)">首页</a>'         else:             home_page = '<a href="%s%d">首页</a>'%(base_url,1)         #尾页         if self.current_page == all_page:             last_page = '<a href="javascript:void(0)">尾页</a>'         else:             last_page = '<a href="%s%d">尾页</a>'%(base_url,all_page)         pager_list.insert(0,home_page)         pager_list.append(last_page)           #最终html字符串         return mark_safe("".join(pager_list))

function

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def user_list(request):     current_page = request.GET.get('page',1)     page_obj = Pager(current_page)     result = models.UserList.objects.all()[page_obj.start:page_obj.end]       all_item = models.UserList.objects.all().count()     pager_str = page_obj.page_str(all_item,"/user_list/?page=")     return render(request,'user_list.html',{'result':result,'pager_str':pager_str})

知识点

1、只取数据库表的前10条

1	models.UserList.objects.all()[0:10]

2、分页是起始数和结束数

1 2	start = (current_page-1)*10 end = current_page*10

3、类的静态方法，不用加括号调用

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class pager():     @property     def start(self):         return (self.current_page-1) * 10   page_obj.start    #==>直接得到结果

4、计算分页数

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all_item = models.UserList.objects.all().count() all_page,div = divmod(all_item,10)     if div >0 :         all_page += 1

5、a标签点击什么也不做

1	<a href="javascript:void(0)">无效标签</a>

6、字符串和列表拼接成html标签

字符串：

1	html += str

列表：

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list.insert(0,A)  --开头插入 list.append(A)    --末尾插入 html = "".join(list)

7、xss字符串安全

1 2	from django.utils.safestring import mark_safe return mark_safe(html_str)

详细步骤

参照：d22page项目及video​

来自为知笔记(Wiz)