django-redis 使用

Django-redis 使用

• 安装 django-redis

  pip install django-redis
  

• 配置信息

  CACHES = {
      "default": {
          "BACKEND": "django_redis.cache.RedisCache",
          "LOCATION": "redis://127.0.0.1:6379/8",
          "OPTIONS": {
              "CLIENT_CLASS": "django_redis.client.DefaultClient",
              "CONNECTION_POOL_KWARGS": {"max_connections": 100},
              # "PASSWORD": "密码",
    		  'CONNECTION_POOL_KWARGS': {'decode_responses': True}, # 添加这一行,数据正常返回，否则将以bytes返回
          }
      }
  }
  

• 使用 views.py

  from django.core.cache import cache
  from rest_framework.views import APIView
  from rest_response import Response
  
  class OrderViews(APIView):
      # 读取缓存信息
      def get(self,request):
          tmp = cache.get('key')
          return Response({
              "res":200,
              "msg":"",
              "data":tmp
          })
      # 设置缓存信息
      def post(self,request):
          # 设置成功返回True,否则返回False
          tmp = cache.set('key','value',10)
          return Response({
              "res":200,
              "msg":"设置成功"
          })
  

• 使用views.py

  from django.core.cache import cache
  from rest_framework.views import APIView
  from rest_response import Response
  from django_redis  import  get_redis_connection
  # 购物车
  class CartViews(APIView):
      # 初始化参数
      def __init__(self):
          self.conn = get_redis_connection('default')
          
      
      # 设置缓存信息
      def post(self,request):
          tmp = self.conn.hset('cart_1',2,{'name':'oppo30pro','price':5999,'count':1})
  		if tmp:
              return Response({
                  "res":200,
                  "msg":"缓存设置成功"
              })
          return Response({
              "res":201,
              "msg":"缓存设置失败"
          })
      
      
      
      # 读取缓存
      def get(self,request):
          data = self.conn.hgetall('cart_1')
          return Response({
              "res":201,
              "msg":""，
              "data":data
          })
  

• url.py

  from django.urls import path,include
  from . import views
  urlpatterns = [
      path('cache/',views.OrderView.as_view()),
  ]
  

• 关于hash还有其他获取值的方式

  • hgetall(name) 取出name对应hash的所有键值
  • hlen（name）获取对应的hash中键值对的个数
  • hkeys（name）返回所有key
  • hvals（name）返回所有value
  • hexisits（name，key）判断这个hash的key在不在
  • hdel（name，*keys）删除指定的键值对
  • hinrby(name,key,amount=1)