def get_es_feed_query(self,
sq,
region=mkt.regions.RESTOFWORLD.id,
carrier=None,
original_region=None):
"""
Build ES query for feed.
Must match region.
Orders by FeedItem.order.
Boosted operator shelf matching region + carrier.
Boosted operator shelf matching original_region + carrier.
region -- region ID (integer)
carrier -- carrier ID (integer)
original_region -- region from before we were falling back,
to keep the original shelf atop the RoW feed.
"""
region_filter = es_filter.Term(region=region)
shelf_filter = es_filter.Term(item_type=feed.FEED_TYPE_SHELF)
ordering_fn = es_function.FieldValueFactor(
field='order',
modifier='reciprocal',
filter=es_filter.Bool(must=[region_filter],
must_not=[shelf_filter]))
boost_fn = es_function.BoostFactor(value=10000.0, filter=shelf_filter)
if carrier is None:
# If no carrier, just match the region and exclude shelves.
return sq.query('function_score',
functions=[ordering_fn],
filter=es_filter.Bool(must=[region_filter],
must_not=[shelf_filter]))
# Must match region.
# But also include the original region if we falling back to RoW.
# The only original region feed item that will be included is a shelf
# else we wouldn't be falling back in the first place.
region_filters = [region_filter]
if original_region:
region_filters.append(es_filter.Term(region=original_region))
return sq.query(
'function_score',
functions=[boost_fn, ordering_fn],
filter=es_filter.Bool(
should=region_filters,
# Filter out shelves that don't match the carrier.
must_not=[
es_filter.Bool(must=[shelf_filter],
must_not=[es_filter.Term(carrier=carrier)])
]))
def get_featured_websites(self):
"""
Get up to 11 featured MOWs for the request's region. If less than 11
are available, make up the difference with globally-featured MOWs.
"""
REGION_TAG = 'featured-website-%s' % self.request.REGION.slug
region_filter = es_filter.Term(tags=REGION_TAG)
GLOBAL_TAG = 'featured-website'
global_filter = es_filter.Term(tags=GLOBAL_TAG)
mow_query = query.Q(
'function_score',
filter=es_filter.Bool(should=[region_filter, global_filter]),
functions=[
SF('random_score', seed=self._get_daily_seed()),
es_function.BoostFactor(value=100.0, filter=region_filter)
],
)
es = Search(using=WebsiteIndexer.get_es())[:11]
results = es.query(mow_query).execute().hits
return ESWebsiteSerializer(results, many=True).data
