Some small query optimizations in templatetags #55
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jnation3406
commented
Jul 21, 2025
| observations = observations.filter(observation_id='template pending') | ||
| cadences = DynamicCadence.objects.filter(active=False, observation_group__in=ObservationGroup.objects.filter(name__in=[o.parameters.get('name', '') for o in observations])) | ||
| observation_groups = {obsgroup for observation in observations for obsgroup in observation.observationgroup_set.all() for cadence in obsgroup.dynamiccadence_set.all() if not cadence.active} |
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Cadences weren't used other than to get their observation_groups so I just changed the code to get those directly and remove the cadences reference. This function still does a bunch of queries but its at least a little less than before.
jnation3406
commented
Jul 21, 2025
| target=target, | ||
| data_type=settings.DATA_PRODUCT_TYPES['photometry'][0], | ||
| value__has_key='filter')).order_by('timestamp') | ||
| value__has_key='filter')).order_by('timestamp').prefetch_related('message') |
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This prefetch greatly reduces the queries since it was doing an extra query per ReducedDatum to get the messages for each before.
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Just a few template partial query changes to reduce the number of DB queries needed and speed up performance.