elif ad.feeds[0] not in e_ad.feeds:
# If the ad is not listed as being in feeds we already know it
# to be in, then ad the existing feed list to the new ad. Do
# it this way so that we store the latest ad info just retrieved.
ad.feeds += e_ad.feeds
ads_to_put.append(ad)
# EFFICIENCY: Technically, we need to update all UserCmt objects
# which have a denormalized copy of this value too. However,
# this would be mostly worthless since this new feed is probably
# only used a single/few users - better to just do it on-demand.
# (search view does this on-demand updating)
elif ad.update_dt != e_ad.update_dt:
# If the ad was updated but the feed is already present in the
# existing ad entity's feeds
ad.feeds = e_ad.feeds
ads_to_put.append(ad)
# else: the add hasn't changed => no need to send it to the datastore
# create/update Ad entities
if ads_to_put:
db.put(ads_to_put)
# update memcache entries which specify when a feed was last updated and the number of updated ads
mc_dict = {'feed-update-dt:%s' % feed_key_name : now,
'feed-update-result:%s' % feed_key_name : len(ads_to_put)
}
memcache.set_multi(mc_dict)
# update the Feed entity too
feed.last_update = now
