Django学习手册 - 初识自定义分页

时间:2021-10-31 06:34:25

核心:

<a href='http://127.0.0.1:8000/index-%s'>%s<a>

自定义分页

1.前端处理字符

  后端的字符  return render(request,"index.html",{"l传到前端的数据":list})

  {{ 传到前端的数据 | safe}}

2.后端处理字符

  导入处理的模块 from django.utils.safestring import mark_safe
  mark_safe(需要处理的数据)
  再传递到前端。 以下是练习的代码:
前端:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
#on_c{
background-color: blueviolet;
color: azure;
}
</style>
</head>
<body>
<div>
<ur>
{% for i in list_info %}
<li>
<a >{{ i }}</a>
</li>
{% endfor %}
</ur>
<div style="width: 360px">
{#方式一,前端处理#}
{#<a href="'http://127.0.0.1:8000/index-%s'">上一页</a>#}
<span>{{ d2_s | safe}}</span>
{% for i2 in d %}
<span>{{ i2| safe}}</span>
{% endfor %}
<span>{{ d3_x |safe}}</span>
{#方式二,后台处理数据#}
{#<span>{{ d }}</span>#}
</div>
</div>
</body>
</html>

url配置:

urlpatterns = [
path('admin/', admin.site.urls),
url('^index-(\d+)/', views.index),
]

views:

from django.shortcuts import render
from django.shortcuts import HttpResponse
from django.utils.safestring import mark_safe list_info = []
for i in range(1,199):
list_info.append(i) def index(request,num1):
#将str转为int
num = int(num1) #每页显示多少数据
a = (num-1)*10
b = num*10
list_info2 = list_info[a:b] #分页长度,默认为10
e,f = divmod(len(list_info), 10)
if f !=0:
c = e+2
else:
c = e+1 #分页跳转
d=[]
for i in range(1,c):
if i == num:
d.append("<a id='on_c' href='http://127.0.0.1:8000/index-%s'>%s<a>"%(i,i))
else:
d.append("<a href='http://127.0.0.1:8000/index-%s'>%s<a>" % (i, i)) #分页 str 数据处理
#方式一,前端处理 #方式二,后端处理
# d2 = mark_safe(d) #选中页面分页 居中
if num > 5:
d2 = d[num-6:num+5]
elif num <= 5:
d2 = d[0:10] #上下翻页
if 1< num < len(d):
d2_s = "<a href='http://127.0.0.1:8000/index-%s'>上一页<a>" % (num-1)
d3_x = "<a href='http://127.0.0.1:8000/index-%s'>下一页<a>" % (num+1)
elif num==1:
d2_s = "<a href='http://127.0.0.1:8000/index-%s'>上一页<a>" % num
d3_x = "<a href='http://127.0.0.1:8000/index-%s'>下一页<a>" % (num + 1)
elif num==len(d):
d2_s = "<a href='http://127.0.0.1:8000/index-%s'>上一页<a>" % (num-1)
d3_x = "<a href='http://127.0.0.1:8000/index-%s'>下一页<a>" % num
#将数值传递至前端
return render(request,"index.html",{"list_info":list_info2,'d':d2,"d2_s":d2_s,"d3_x":d3_x})