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Performance optimisation of the related models by letting the DB deal with the relation straight off

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This commit is contained in:
Tom Price
2015-01-26 15:19:37 +00:00
parent 9c9dc07929
commit 6f27474a88
1 changed files with 7 additions and 7 deletions
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14
RIGS/models.py
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@@ -63,7 +63,7 @@ class Person(models.Model, RevisionMixin):
@property
def latest_events(self):
return self.event_set.order_by('-start_date')
return self.event_set.order_by('-start_date').select_related('person','organisation','venue','mic')
class Meta:
permissions = (
@@ -98,7 +98,7 @@ class Organisation(models.Model, RevisionMixin):
@property
def latest_events(self):
return self.event_set.order_by('-start_date')
return self.event_set.order_by('-start_date').select_related('person','organisation','venue','mic')
class Meta:
permissions = (
@@ -158,7 +158,7 @@ class Venue(models.Model, RevisionMixin):
@property
def latest_events(self):
return self.event_set.order_by('-start_date')
return self.event_set.order_by('-start_date').select_related('person','organisation','venue','mic')
class Meta:
permissions = (
@@ -181,11 +181,11 @@ class EventManager(models.Manager):
models.Q(dry_hire=True, checked_in_by__isnull=False, status__gt=Event.CANCELLED) | # Active dry hire GT
models.Q(dry_hire=True, status=Event.CANCELLED, start_date__gte=datetime.date.today())
# Canceled but not started
).order_by('meet_at', 'start_date')
).order_by('meet_at', 'start_date').select_related('person','organisation','venue','mic')
return events
def rig_count(self):
events = self.filter(
event_count = self.filter(
models.Q(start_date__gte=datetime.date.today(), end_date__isnull=True,
is_rig=True) | # Starts after with no end
models.Q(end_date__gte=datetime.date.today(), is_rig=True) | # Ends after
@@ -193,8 +193,8 @@ class EventManager(models.Manager):
is_rig=True) | # Active dry hire LT
models.Q(dry_hire=True, checked_in_by__isnull=False, status__gt=Event.CANCELLED, is_rig=True)
# Active dry hire GT
).order_by('meet_at', 'start_date')
return len(events)
).order_by('meet_at', 'start_date').count()
return event_count
@reversion.register(follow=['items'])