Flaskページデータをredisにキャッシュ

コアはpickleを用いてデータをシーケンス化し,文字ストリームでredisにキャッシュし,使用するときに取り出して逆シーケンス化する.

import redis
from datetime import datetime
from flask import session,request
from ..models import db

import pickle



class Redis:
    @staticmethod
    def connect():
        r = redis.StrictRedis(host='localhost', port=6379, db=0)
        return r

    #                  ，   redis
    @staticmethod
    def set_data(r,key,data,ex=None):
        r.set(key,pickle.dumps(data),ex)

    #      redis        ，    
    @staticmethod
    def get_data(r,key):
        data = r.get(key)
        if data is None:
            return None

        return pickle.loads(data)

@home.route('/detail/')
def detail(id):
    today = datetime.now().date()
    list_goods = None

    #     ，       
    cached_redis_remark = ""


    r = Redis.connect()

    #    
    key = "data-cached:detail-id-%d" % (id)
    # redis    （          ，        None)
    goods = Redis.get_data(r, key)
    if current_app.config['ENABLE_CACHED_PAGE_TO_REDIS'] and goods:
        # flash("      ")
        cached_redis_remark += "goods|"
    else:
        # flash("     ")
        goods=Goods.query.get(id)
        #             
        simple_goods = goods
        if goods:
            simple_goods.timestamp = str(goods.timestamp)
        #   redis
        if current_app.config['ENABLE_CACHED_PAGE_TO_REDIS']:
            #   redis  ,5    
            Redis.set_data(r, key, simple_goods, current_app.config['EXPIRE_CACHED_PAGE_TO_REDIS'])



    #      
    #    
    recommend_count = 4 if goods else 12

    key = "data-cached:detail-recommend-%d" % recommend_count
    list_recommend_goods = Redis.get_data(r, key)
    if current_app.config['ENABLE_CACHED_PAGE_TO_REDIS'] and list_recommend_goods:
        # flash("      ")
        cached_redis_remark += "recommend|"
    else:
        list_recommend_goods = Goods.query.filter(Goods.coupon_expire >= today).filter_by(effective=True).limit(recommend_count).all()
        #    redis
        if current_app.config['ENABLE_CACHED_PAGE_TO_REDIS']:
            #   redis  ,5    
            Redis.set_data(r, key, list_recommend_goods, current_app.config['EXPIRE_CACHED_PAGE_TO_REDIS'])



    return render_template("home/detail.html", goods=goods,list_goods=list_recommend_goods,cached_redis_remark=cached_redis_remark)