def push_tweet_to_cache(cls, tweet):
# queryset is lazy loading
queryset = Tweet.objects.filter(
user_id=tweet.user_id).order_by('-created_at')
key = USER_TWEETS_PATTERN.format(user_id=tweet.user_id)
RedisHelper.push_object(key, tweet, queryset)
def get_cached_tweets(cls, user_id):
# Queryset is lazy loading
# 此时并没有进行数据库的访问，只有需要进行iteration的时候才会真正查询数据库
queryset = Tweet.objects.filter(user_id=user_id).order_by('-created_at')
key = USER_TWEETS_PATTERN.format(user_id=user_id)
return RedisHelper.load_objects(key, queryset)
def get_cached_tweets(cls, user_id):
# queryset is lazy loading, it will loaded when it's needed. eg, for loop queryset, list(queryset)
queryset = Tweet.objects.filter(
user_id=user_id).order_by('-created_at')
key = USER_TWEETS_PATTERN.format(user_id=user_id)
return RedisHelper.load_objects(key, queryset)
def get_cached_tweets(cls, user_id):
# queryset = Tweet.objects.filter(user_id=user_id).order_by('-created_at')
key = USER_TWEETS_PATTERN.format(user_id=user_id)
return RedisHelper.load_objects(key, lazy_load_tweets(user_id))
def push_tweet_to_cache(cls, tweet):
key = USER_TWEETS_PATTERN.format(user_id=tweet.user_id)
RedisHelper.push_object(key, tweet, lazy_load_tweets(tweet.user_id))
def get_cached_tweets(cls, user_id):
key = USER_TWEETS_PATTERN.format(user_id=user_id)
return RedisHelper.load_objects(key, lazy_load_tweets(user_id))
def get_cached_tweets(cls, user_id):
# Queryset is lazy loading, this statement doesn't incur real database query
queryset = Tweet.objects.filter(
user_id=user_id).order_by('-created_at')
key = USER_TWEETS_PATTERN.format(user_id=user_id)
return RedisHelper.load_objects(key, queryset)
