이 뷰에 포함 된 모델입니다 :views.py에서 Django SQL SELECT 쿼리를 최적화하는 방법?
def list_movies(request, time_period):
city = utils.get_city_from_request(request)
if time_period == 'proximas-dos-horas':
(start_date,
end_date,
hours_start,
hours_end) = utils.get_datetime_filters_from_time_period(time_period)
else:
(start_date,
end_date) = utils.get_datetime_filters_from_time_period(time_period)
if not start_date: # 404 for invalid time periods
raise Http404
movies = Movie.objects.filter(
showtime__city=city.code,
showtime__visible=1,
).order_by('-tsm').distinct()
if time_period == 'proximas-dos-horas':
movies = movies.filter(
showtime__start_date__lte=start_date,
showtime__end_date__gte=end_date,
showtime__time__range=(hours_start, hours_end))
elif time_period == 'proximos-estrenos':
movies = movies.filter(
showtime__start_date=None,
showtime__end_date=None,
)
else:
movies = movies.filter(
showtime__start_date__lte=start_date,
showtime__end_date__gte=end_date)
context = {'movies': movies, 'city': city, 'time_period': time_period}
return render_to_response('list_movies.html', context,
context_instance=RequestContext(request))
현재이 뷰가 데이터베이스에 많은 자원을 소모하고,이 결과 :
class Movie(models.Model):
title_original = models.CharField(max_length=300,
db_column='titulooriginal')
title_translated = models.CharField(max_length=300, blank=True,
db_column='titulotraducido')
thumbnail = models.CharField(max_length=300, blank=True,
db_column='imagen')
length = models.CharField(max_length=75, db_column='duracion')
rating = models.CharField(max_length=75, db_column='censura')
genre = models.CharField(max_length=75, db_column='genero')
country_of_origin = models.CharField(max_length=150, db_column='pais')
trailer = models.CharField(max_length=300, blank=True, db_column='trailer')
synopsis = models.CharField(max_length=3600, blank=True,
db_column='sinopsis')
cast = models.CharField(max_length=300, blank=True, db_column='elenco')
director = models.CharField(max_length=150, db_column='director')
slug = models.SlugField(unique=True, blank=True)
tsc = models.DateTimeField(auto_now=False, auto_now_add=True, db_column='tsc', null=True)
tsm = models.DateTimeField(auto_now=True, auto_now_add=True, db_column='tsm', null=True)
class Meta:
db_table = u'peliculas'
def __unicode__(self):
return self.title_original
class ShowTime(models.Model):
LANGUAGE_ESPANOL = 'Espanol'
LANGUAGE_SUBTITLED = 'Subtitulada'
LANGUAGE_CHOICES = (
(LANGUAGE_ESPANOL, LANGUAGE_ESPANOL),
(LANGUAGE_SUBTITLED, LANGUAGE_SUBTITLED))
movie = models.ForeignKey(Movie, db_column='idpelicula')
theater = models.ForeignKey(Theater, db_column='idcine',
null=True)
time = models.TimeField(null=True, db_column='hora')
type_3d = models.NullBooleanField(db_column=u'3d')
type_xd = models.NullBooleanField(null=True, db_column='xd')
type_gtmax = models.NullBooleanField(null=True, db_column='gtmax')
type_vip = models.NullBooleanField(null=True, db_column='vip')
type_imax = models.NullBooleanField(null=True, db_column='imax')
language = models.CharField(max_length=33, blank=True, db_column='idioma',
choices=LANGUAGE_CHOICES,
default=LANGUAGE_ESPANOL)
city = models.ForeignKey(City, db_column='idciudad')
start_date = models.DateField(blank=True, db_column='fecha_inicio')
end_date = models.DateField(blank=True, db_column='fecha_fin')
visible = models.NullBooleanField(null=True, db_column='visible')
tsc = models.DateTimeField(auto_now=False, auto_now_add=True, db_column='tsc', null=True)
tsm = models.DateTimeField(auto_now=True, auto_now_add=True, db_column='tsm', null=True)
class Meta:
db_table = u'funciones'
def __unicode__(self):
return (unicode(self.theater) + " " + unicode(self.movie.title_original) + " " + unicode(self.time))
은 또한이 모델을 쿼리 뷰입니다 브라우저에서 웹 트랜잭션의 응답 시간이 짧습니다. 나는 앱과 DB 레벨의 트랜잭션을 분석하기 위해 New Relic 모니터링 소프트웨어와 앱을 연결했습니다. 이것은 내가 가진 것을 추적 세부 사항입니다 :
DB 자원의 소비가 최소
에고마워요을 삭제하도록 내가이보기를 최적화 SOMO 조언을 좀하고 싶습니다!
'showtime__start_date = None'을'showtime__start_date__isnull = True'로 바꾸고 싶을 수도 있습니다. – karthikr
showtime__start_date 또는 showtime__end_date에 대한 색인이 있습니까? 새로운 유물이 당신이 할 수 있도록하고 explain_plan 쿼리. 그렇다면 문제 진단에 도움이 될 것입니다. – DrewM