55 lines
1.5 KiB
Python
55 lines
1.5 KiB
Python
"""
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Regression tests for an object that cannot access a single related object due
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to a restrictive default manager.
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"""
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from django.db import models
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class SourceManager(models.Manager):
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def get_query_set(self):
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return super(SourceManager, self).get_query_set().filter(is_public=True)
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class Source(models.Model):
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is_public = models.BooleanField()
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objects = SourceManager()
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class Item(models.Model):
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source = models.ForeignKey(Source)
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__test__ = {'API_TESTS':"""
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>>> public_source = Source.objects.create(is_public=True)
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>>> public_item = Item.objects.create(source=public_source)
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>>> private_source = Source.objects.create(is_public=False)
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>>> private_item = Item.objects.create(source=private_source)
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# Only one source is available via all() due to the custom default manager.
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>>> Source.objects.all()
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[<Source: Source object>]
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>>> public_item.source
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<Source: Source object>
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# Make sure that an item can still access its related source even if the default
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# manager doesn't normally allow it.
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>>> private_item.source
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<Source: Source object>
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# If the manager is marked "use_for_related_fields", it'll get used instead
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# of the "bare" queryset. Usually you'd define this as a property on the class,
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# but this approximates that in a way that's easier in tests.
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>>> Source.objects.use_for_related_fields = True
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>>> private_item = Item.objects.get(pk=private_item.pk)
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>>> private_item.source
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Traceback (most recent call last):
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...
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DoesNotExist: Source matching query does not exist.
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"""}
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