Redis实现微博后台业务逻辑系列（七）
import redisclass LikeMessage(object):
"""实现微博点赞功能"""
def __init__(self, msg_id, client):
self.msg_id = msg_id
self.client = client
self.key = "weibo::message::" + str(msg_id) + "::like"
def like(self, user_id):
"""对该微博点赞"""
self.client.sadd(self.key, user_id)
def is_liking(self, user_id):
"""检查用户是否赞了该微博"""
return self.client.sismember(self.key, user_id)
def undo(self, user_id):
"""取消点赞"""
self.client.srem(self.key, user_id)
def count(self):
"""获取该微博点赞人数"""
return self.client.scard(self.key)
def get_all_liking_user(self):
"""返回赞了该微博的所有用户"""
if not self.client.exists(self.key):
return False
else:
return self.client.smembers(self.key)
if __name__ == "__main__":
redis_client = redis.StrictRedis()
vote = LikeMessage(65535, redis_client)
vote.like(10010)
vote.like(10086)
vote.like(10000)
print(vote.count())
print(vote.is_liking(10086))
vote.undo(10086)
print(vote.get_all_liking_user())
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