Django中的缓存应用

有关博客：http://www.cnblogs.com/yuanchenqi/articles/8034442.html#_label2

Django中的缓存应用

1、视图缓存  

基于视图做的缓存，引入函数做到有时间的缓存限制

from django.views.decorators.cache import cache_page
import time
from .models import *

@cache_page(15)          #超时时间为15秒
def index(request):

 t=time.time()      #获取当前时间
 bookList=Book.objects.all()
 return render(request,"index.html",locals())

模板（index.html）

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h3>当前时间:-----{{ t }}</h3>

<ul>
    {% for book in bookList %}
       <li>{{ book.name }}--------->{{ book.price }}$</li>
    {% endfor %}
</ul>

</body>
</html>

 

2、全局缓存

（图下黄色部分就是全局缓存的插件）

MIDDLEWARE_CLASSES = (
    'django.middleware.cache.UpdateCacheMiddleware',   #响应HttpResponse中设置几个headers     
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'django.middleware.security.SecurityMiddleware',
    'django.middleware.cache.FetchFromCacheMiddleware',   #用来缓存通过GET和HEAD方法获取的状态码为200的响应

)


CACHE_MIDDLEWARE_SECONDS=10    #保存缓存时间的变量（单位：秒）
from django.views.decorators.cache import cache_page
import time
from .models import *


def index(request):

     t=time.time()      #获取当前时间
     bookList=Book.objects.all()
     return render(request,"index.html",locals())

def foo(request):
    t=time.time()      #获取当前时间
    return HttpResponse("HELLO:"+str(t))

3、局部缓存

（用的最多的还是局部缓存）

from django.views.decorators.cache import cache_page
import time
from .models import *


def index(request):

     t=time.time()      #获取当前时间
     bookList=Book.objects.all()

     return render(request,"index.html",locals())
{% load cache %}    #引入
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
 <h3 style="color: green">不缓存:-----{{ t }}</h3>

{% cache 2 'name' %}  
 <h3>缓存:-----:{{ t }}</h3>
{% endcache %}

</body>
</html>

 

 

posted @ 2018-01-23 21:34  hello沃德  阅读(119)  评论(0)    收藏  举报