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cart.py
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136 lines (117 loc) · 3.18 KB
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#!/usr/bin/env python
# encoding: utf-8
"""
@author: zhanghe
@software: PyCharm
@file: cart.py
@time: 16-1-27 上午10:27
"""
import redis
redis_client = redis.StrictRedis(host='localhost', port=6379, db=0)
class Cart(object):
"""
购物车
"""
uid = ''
prefix = ''
def __init__(self, uid, prefix='cart'):
self.uid = uid
self.prefix = prefix
def add_item(self, pid, num=1):
"""
添加物品
:param pid:
:param num:
:return:
"""
key = "%s:%s:%s" % (self.prefix, self.uid, pid)
# 判断物品是否存在
if redis_client.exists(key):
redis_client.hincrby(key, 'num', num)
else:
# 如果不存在，添加物品至购物车
redis_client.hmset(key, {'pid': pid, 'num': num})
return True
def del_item(self, pid):
"""
删除物品
:param pid:
:return:
"""
key = "%s:%s:%s" % (self.prefix, self.uid, pid)
# 判断物品是否存在
if redis_client.exists(key):
redis_client.delete(key)
return True
def increase(self, pid, num=1):
"""
增加物品数量
:param pid:
:param num:
:return:
"""
key = "%s:%s:%s" % (self.prefix, self.uid, pid)
# 判断物品是否存在
if redis_client.exists(key):
redis_client.hincrby(key, 'num', num)
return True
else:
# 如果不存在，添加物品至购物车
return False
def decrease(self, pid, num=1):
"""
减少物品数量
:param pid:
:param num:
:return:
"""
key = "%s:%s:%s" % (self.prefix, self.uid, pid)
# 判断物品是否存在
if redis_client.exists(key):
if num >= int(redis_client.hget(key, 'num')):
# 如果超过，设置默认最小数量
redis_client.hmset(key, {'num': 1})
else:
redis_client.hincrby(key, 'num', -num)
return True
def cart_list(self):
"""
显示购物车
:return:
"""
key = "%s:%s:*" % (self.prefix, self.uid)
car_key_list = redis_client.keys(key)
cart_list = []
for item in car_key_list:
cart_list.append(redis_client.hgetall(item))
return cart_list
def test():
obj = Cart('02')
print obj.cart_list()
obj.add_item('3')
print obj.cart_list()
obj.del_item('4')
print obj.cart_list()
obj.increase('3')
print obj.cart_list()
obj.decrease('3')
print obj.cart_list()
obj.add_item('4')
print obj.cart_list()
obj.add_item('5', 10)
print obj.cart_list()
obj.decrease('4', 10)
print obj.cart_list()
if __name__ == '__main__':
test()
"""
测试结果
[]
[{'num': '1', 'pid': '3'}]
[{'num': '1', 'pid': '3'}]
[{'num': '2', 'pid': '3'}]
[{'num': '1', 'pid': '3'}]
[{'num': '1', 'pid': '4'}, {'num': '1', 'pid': '3'}]
[{'num': '10', 'pid': '5'}, {'num': '1', 'pid': '4'}, {'num': '1', 'pid': '3'}]
[{'num': '10', 'pid': '5'}, {'num': '1', 'pid': '4'}, {'num': '1', 'pid': '3'}]
"""