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Fix performance issue in filtering checkin list (Z#23170917) (#4607)
* Fix performance issue in filtering checkin list * remove test
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@@ -141,7 +141,7 @@ class CheckinList(LoggedModel):
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return self.positions_query(ignore_status=False)
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@scopes_disabled()
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def positions_inside_query(self, ignore_status=False, at_time=None):
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def _filter_positions_inside(self, qs, at_time=None):
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if at_time is None:
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c_q = []
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else:
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@@ -149,7 +149,7 @@ class CheckinList(LoggedModel):
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if "postgresql" not in settings.DATABASES["default"]["ENGINE"]:
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# Use a simple approach that works on all databases
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qs = self.positions_query(ignore_status=ignore_status).annotate(
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qs = qs.annotate(
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last_entry=Subquery(
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Checkin.objects.filter(
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*c_q,
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@@ -202,7 +202,7 @@ class CheckinList(LoggedModel):
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.values("position_id", "type", "datetime", "cnt_exists_after")
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.query.sql_with_params()
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)
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return self.positions_query(ignore_status=ignore_status).filter(
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return qs.filter(
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pk__in=RawSQL(
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f"""
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SELECT "position_id"
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@@ -214,6 +214,10 @@ class CheckinList(LoggedModel):
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)
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)
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@scopes_disabled()
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def positions_inside_query(self, ignore_status=False, at_time=None):
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return self._filter_positions_inside(self.positions_query(ignore_status=ignore_status), at_time=at_time)
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@property
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def positions_inside(self):
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return self.positions_inside_query(None)
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