def import_average_category(self, channel_ids=None, start=None, stop=None, automatic_flush=True):
from rockpack.mainsite.services.video.models import VideoInstance, Channel
query = readonly_session.query(VideoInstance.category, Channel.id).join(Channel, Channel.id == VideoInstance.channel).order_by(Channel.id)
if channel_ids:
query = query.filter(Channel.id.in_(channel_ids))
if start:
query = query.filter(Channel.date_updated.between(start, stop))
category_map = {}
for instance_cat, channel_id in query:
channel_cat_counts = category_map.setdefault(channel_id, {})
current_count = channel_cat_counts.setdefault(instance_cat, 0)
channel_cat_counts[instance_cat] = current_count + 1
app.logger.info('Channel category map size: %d', len(category_map))
ec = ESChannel.updater(bulk=True)
for channel_id, c_map in category_map.iteritems():
ec.set_document_id(channel_id)
ec.add_field('category', main_category(c_map))
ec.update()
ec.reset()
if automatic_flush:
self.conn.flush_bulk(forced=True)
def import_channel_share(self, automatic_flush=True):
from rockpack.mainsite.services.share.models import ShareLink
from rockpack.mainsite.services.user.models import UserActivity, User
from rockpack.mainsite.services.video.models import VideoInstance, Channel
total = 0
missing = 0
start_time = time.time()
def _normalised(val, max_val, min_val):
try:
return (val - min_val) / (abs(max_val) - abs(min_val))
except (ZeroDivisionError, decimal.DivisionByZero, decimal.InvalidOperation):
return 0
def _update_channel_id(id, val, max_val, min_val):
channel_dict[id] = channel_dict.setdefault(id, 0) + _normalised(val, max_val, min_val)
# The strength of actions decay until any older than zulu have no effect
zulu = datetime.now() - timedelta(days=app.config.get('CHANNEL_RANK_ZULU', 1))
time_since_zulu = (datetime.utcnow() - zulu).total_seconds()
for locale in ['en-gb', 'en-us']:
app.logger.debug('starting for %s', locale)
channel_dict = {}
channel_shares = {}
summation = func.sum(
(time_since_zulu - (func.extract('epoch', datetime.utcnow()) - func.extract('epoch', UserActivity.date_actioned))) / time_since_zulu
)
# activity for channels from videos
query = readonly_session.query(
distinct(Channel.id).label('channel_id'),
summation.label('summed')
).join(
VideoInstance, VideoInstance.channel == Channel.id
).join(
UserActivity, UserActivity.object_id == VideoInstance.id
).join(
User, User.id == UserActivity.user
).filter(
UserActivity.action == 'star',
UserActivity.object_type == 'video_instance',
UserActivity.date_actioned > zulu,
User.locale == locale
).group_by(Channel.id)
summed = query.subquery().columns.summed
q_max, q_min = UserActivity.query.session.query(func.max(summed), func.min(summed)).one()
for id, count in query.yield_per(6000):
channel_dict.setdefault(id, {})
channel_dict[id]['user_activity'] = [count, _normalised(count, q_max, q_min)]
channel_dict[id]['norm_user_activity'] = _normalised(count, q_max, q_min)
app.logger.debug('user activity done')
summation = func.sum(
(time_since_zulu - (func.extract('epoch', datetime.utcnow()) - func.extract('epoch', ShareLink.date_created))) / time_since_zulu
)
# activity for channel shares
query = readonly_session.query(
distinct(Channel.id).label('channel_id'),
summation.label('summed')
).join(
ShareLink,
ShareLink.object_id == Channel.id
).join(
User, User.id == ShareLink.user
).filter(
Channel.deleted == False,
Channel.public == True,
ShareLink.object_type == 'channel',
ShareLink.date_created > zulu,
ShareLink.click_count > 0,
User.locale == locale
).group_by(Channel.id)
summed = query.subquery().columns.summed
q_max, q_min = ShareLink.query.session.query(func.max(summed), func.min(summed)).one()
channel_share_vals = (q_max, q_min)
for id, count in query.yield_per(6000):
channel_dict.setdefault(id, {})
channel_shares[id] = count
channel_dict[id]['share_link_channel'] = [count, _normalised(count, q_max, q_min)]
app.logger.debug('channel shares done')
# activity for videos shares of channels
query = readonly_session.query(
distinct(Channel.id).label('channel_id'),
summation.label('summed')
).join(
VideoInstance,
VideoInstance.channel == Channel.id
).join(
ShareLink,
ShareLink.object_id == VideoInstance.id
).join(
User, User.id == ShareLink.user
).filter(
Channel.deleted == False,
Channel.public == True,
ShareLink.object_type == 'video_instance',
ShareLink.date_created > zulu,
ShareLink.click_count > 0,
User.locale == locale
).group_by(Channel.id)
summed = query.subquery().columns.summed
q_max, q_min = ShareLink.query.session.query(func.max(summed), func.min(summed)).one()
for id, count in query.yield_per(6000):
channel_dict.setdefault(id, {})
channel_dict[id]['share_link_video'] = [count, _normalised(count, q_max, q_min)]
val = channel_shares.get(id, 0)
# We may get None returned in the data
if None in channel_share_vals:
channel_share_vals = [0, 0]
channel_dict[id]['norm_share_link_channel'] = channel_dict[id].setdefault('norm_share_link_channel', 0) + _normalised(count + val, q_max + channel_share_vals[0], q_min + channel_share_vals[1])
app.logger.debug('video shares done')
app.logger.debug('... updating elasticsearch for %s ...', locale)
done = 1
i_total = len(channel_dict)
ec = ESChannel.updater(bulk=True)
for id, _dict in channel_dict.iteritems():
try:
count = 0
for k, v in _dict.iteritems():
if k.startswith('norm'):
count += v
if count == 0:
continue
ec.set_document_id(id)
ec.add_field('normalised_rank[\'%s\']' % locale, float(count))
ec.update()
except exceptions.DocumentMissingException:
missing += 1
finally:
ec.reset()
total += 1
if app.logger.isEnabledFor(logging.DEBUG):
self.print_percent_complete(done, i_total)
done += 1
if automatic_flush:
ESChannel.flush()
app.logger.debug('%s total updates in two passes. finished in %s seconds (%s channels not in es)', total, time.time() - start_time, missing)
