46 lines
1.1 KiB
Python
46 lines
1.1 KiB
Python
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from datetime import timedelta
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from django.db import models
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from django.utils import timezone
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class EnabledQuerySet(models.QuerySet):
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"""
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Queryset to select all objects that are not disabled.
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"""
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def enabled(self):
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return self.filter(disabled=False)
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class PublishedQuerySet(models.QuerySet):
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"""
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Queryset to select all objects that have been published.
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"""
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def published(self):
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results = self.filter(
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models.Q(published_date__isnull=False) &
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models.Q(published_date__lte=timezone.now())
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)
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return results
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class TypeQuerySet(models.QuerySet):
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"""
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Queryset to select all objects that are either songs or jingles.
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"""
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def songs(self):
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return self.filter(song_type='S')
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def jingles(self):
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return self.filter(song_type='J')
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class SongQuerySet(EnabledQuerySet,
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PublishedQuerySet,
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TypeQuerySet):
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"""
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Queryset combination that can easily select enabled objects, published
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objects, and objects of a certain song type.
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"""
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pass
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