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Better performance with "DISTINCT ON" and function memoization

pull/78/head
Konstantin Gründger 2019-04-03 10:00:46 +02:00
rodzic ceced4b3b0
commit c4fce5646b
1 zmienionych plików z 5 dodań i 3 usunięć
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8
ogn_python/routes.py
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@ -15,7 +15,7 @@ def get_countries_in_receivers():
query = db.session.query(Country) \ query = db.session.query(Country) \
.filter(Country.gid == Receiver.country_id) \ .filter(Country.gid == Receiver.country_id) \
.order_by(Country.iso2) \ .order_by(Country.iso2) \
.distinct() .distinct(Country.iso2)
return [country for country in query.all()] return [country for country in query.all()]
@ -25,21 +25,23 @@ def get_countries_in_logbook():
query = db.session.query(Country) \ query = db.session.query(Country) \
.filter(Country.iso2 == Airport.country_code) \ .filter(Country.iso2 == Airport.country_code) \
.order_by(Country.iso2) \ .order_by(Country.iso2) \
.distinct() .distinct(Country.iso2)
return [country for country in query.all()] return [country for country in query.all()]
@cache.memoize()
def get_airports_in_country(sel_country): def get_airports_in_country(sel_country):
query = db.session.query(Airport) \ query = db.session.query(Airport) \
.filter(Airport.country_code == sel_country) \ .filter(Airport.country_code == sel_country) \
.filter(Logbook.takeoff_airport_id == Airport.id) \ .filter(Logbook.takeoff_airport_id == Airport.id) \
.order_by(Airport.name) \ .order_by(Airport.name) \
.distinct() .distinct(Airport.name)
return [airport for airport in query.all()] return [airport for airport in query.all()]
@cache.memoize()
def get_dates_for_airport(sel_airport): def get_dates_for_airport(sel_airport):
query = db.session.query(func.date(Logbook.reftime), func.count(Logbook.id).label('logbook_count')) \ query = db.session.query(func.date(Logbook.reftime), func.count(Logbook.id).label('logbook_count')) \
.filter(Airport.id == sel_airport) \ .filter(Airport.id == sel_airport) \