django中使用redis

第一种  自定义redis

1.创建utils文件夹，创建一个redis_pool.py文件,用导入的方式使用

import redis

POOL = redis.ConnectionPool(host='1277.0.0.1',port=6397,password='chenchen',max_commections=100)

2.views.py

from django.shortcuts import HttpResponse
import redis

from utils.redis_pool import POOL
# Create your views here.


def index(request):
    conn = redis.Redis(connection_pool=POOL)
    conn.hset('k1','age','18')

    return HttpResponse("设置成功")

def order(request):
    conn = redis.Redis(connection_pool=POOL)
    conn.hget('k1', 'age',)

    return HttpResponse("获取成功")

第二种 使用第三方组件django-redis

setting.py中配置

#redis的配置   首先要pip3 install django-redis
#两个redis，想连接那个连接那个conn = get_redis_connection("default")
CACHES = {
    "default": {
        "BACKEND": "django_redis.cache.RedisCache",
        "LOCATION": "redis://127.0.0.1:6379",
        "OPTIONS": {
            "CLIENT_CLASS": "django_redis.client.DefaultClient",
            "CONNECTION_POOL_KWARGS": {"max_connections": 100}
            # "PASSWORD": "密码",
        }
    },
    "back": {
            "BACKEND": "django_redis.cache.RedisCache",
            "LOCATION": "redis://127.0.0.1:6379",
            "OPTIONS": {
                "CLIENT_CLASS": "django_redis.client.DefaultClient",
                "CONNECTION_POOL_KWARGS": {"max_connections": 100}
                # "PASSWORD": "密码",
            }
        }
}

views.py

from django.shortcuts import HttpResponse
from django_redis import get_redis_connection


import time

# Create your views here.


def index(request):
    conn = get_redis_connection("default")

    return HttpResponse("设置成功")

def order(request):
    conn = get_redis_connection("back")
    return HttpResponse("获取成功")

第三种  全站缓存，利用中间件

  使用中间件，经过一系列的认证等操作，如果内容在缓存中存在，则使用FetchFromCacheMiddleware获取内容并返回给用户，当返回给用户之前，判断缓存中是否已经存在，如果不存在则UpdateCacheMiddleware会将缓存保存至缓存，从而实现全站缓存

1.setting.py中配置

#redis的配置   首先要pip3 install django-redis
CACHES = {
    "default": {
        "BACKEND": "django_redis.cache.RedisCache",
        "LOCATION": "redis://127.0.0.1:6379",
        "OPTIONS": {
            "CLIENT_CLASS": "django_redis.client.DefaultClient",
            "CONNECTION_POOL_KWARGS": {"max_connections": 100}
            # "PASSWORD": "密码",
        }
    }
}

2. 中间件配置

MIDDLEWARE = [
    'django.middleware.cache.UpdateCacheMiddleware', #全站缓存
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'django.middleware.cache.FetchFromCacheMiddleware',  #全站缓存
    ]

CACHE_MIDDLEWARE_ALIAS = ""
CACHE_MIDDLEWARE_SECONDS = ""  #全站缓存的超时时间
CACHE_MIDDLEWARE_KEY_PREFIX = ""

views.py

from django.shortcuts import HttpResponse

#不加缓存的话，时间每次都是变的，加缓存的话时间不变
import time

# Create your views here.


def index(request):
    ctime = str(time.time())

    return HttpResponse(ctime)

def order(request):
    ctime = str(time.time())
    return HttpResponse(ctime)

第四种 单视图缓存

setting.py中配置

#redis的配置   首先要pip3 install django-redis
CACHES = {
    "default": {
        "BACKEND": "django_redis.cache.RedisCache",
        "LOCATION": "redis://127.0.0.1:6379",
        "OPTIONS": {
            "CLIENT_CLASS": "django_redis.client.DefaultClient",
            "CONNECTION_POOL_KWARGS": {"max_connections": 100}
            # "PASSWORD": "密码",
        }
    }
}

views.py

from django.shortcuts import HttpResponse

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

# Create your views here.
#a.单视图缓存，15分钟的缓存，15分钟后消失
@cache_page(60*15)
def index(request):

    ctime = str(time.time())
    return HttpResponse(ctime)

def order(request):
    ctime = str(time.time())
    return HttpResponse(ctime)

#b.局部缓存 比如购买商品，除了数量变化外，其他的如商品名称，描述，图片不变化,可以放到缓存中
#某个页面的某部分缓存

第五种 局部页面缓存

#b.局部缓存 比如购买商品，除了数量变化外，其他的如商品名称，描述，图片不变化,可以放到缓存中
#某个页面的某部分缓存
html文件

{% load cache %}

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h2>redis局部缓存</h2>

<div>111111111111111</div>



{##这里面的东西是静止不动的，可以用缓存#}
5000是秒，key001是redis中的key值
{% cache 5000 key001 %}
    <div></div>
{% endcache %}



</body>
</html>