def get_article(id, user=None):
"""Gets a single article (formatted by json_data) from redis or postgresql
And performs some pre-filters for the current user
Args:
id (int): id
user (User): the current user
Returns:
None if the article is not existed or a dict of article data
"""
id = int(id)
key = Article.cache_key(id)
redis_client = get_client(key)
article = None
if not redis_client.exists(key):
article = Article.find_by_pk(id)
if article:
data = article.json_data()
redis_client.set(key, json.dumps(data))
article = data
else:
if redis_client.type(key) == 'hash':
print redis_client
article = json.loads(redis_client.get(key))
article['user_vote'] = Article.check_vote(user, article['id'])
return article
def update_article(id, article=None):
"""Updates the cache of article :id
Args:
id (int): article id
article (Article): if not provided, an article will be queried from postgresql
Returns:
Article
"""
id = int(id)
if not article:
article = Article.find_by_pk(id)
if article:
key = Article.cache_key(id)
redis_client = get_client(key)
data = article.json_data()
redis_client.set(key, json.dumps(data))
return article
