def fanout_newsfeeds_batch_task(tweet_id, created_at, follower_ids):
# import 写在里面避免循环依赖
from newsfeeds.services import NewsFeedService
batch_params = [
{'user_id': follower_id, 'created_at': created_at, 'tweet_id': tweet_id}
for follower_id in follower_ids
]
newsfeeds = NewsFeedService.batch_create(batch_params)
return "{} newsfeeds created".format(len(newsfeeds))
def fanout_newsfeeds_batch_task(tweet_id, created_at, follower_ids):
# we put import inside to avoid circular dependency
from newsfeeds.services import NewsFeedService
batch_params = [
{'user_id': follower_id, 'created_at': created_at, 'tweet_id': tweet_id}
for follower_id in follower_ids
]
newsfeeds = NewsFeedService.batch_create(batch_params)
return "{} newsfeeds created".format(len(newsfeeds))
def fanout_newsfeeds_batch_task(tweet_id, created_at, follower_ids):
# import to prevent cycle dependence
from newsfeeds.services import NewsFeedService
# wrong method, put DB operation in for
#for follower_id in follower_ids:
# Newsfeed.objects.create(user_id=follower_id, tweet_id=tweet_id)
# right method
# bulk_create
batch_params = [{
'user_id': follower_id,
'created_at': created_at,
'tweet_id': tweet_id
} for follower_id in follower_ids]
newsfeeds = NewsFeedService.batch_create(batch_params)
return '{} newsfeeds created'.format(len(newsfeeds))