#3416: Model API documentation section 'Modifying initial Manager QuerySets'
misleads about Admin behaviour
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Reporter: Alex Dedul | Owner: jacob
Status: new | Component: Documentation
Version: SVN | Resolution:
Keywords: | Stage: Unreviewed
Has_patch: 0 | Needs_docs: 0
Needs_tests: 0 | Needs_better_patch: 0
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Comment (by Alex Dedul):
Here we go. Test case 1:
{{{
class KnowledgeBaseCategoryManager(models.Manager):
def get_query_set(self):
return super(KnowledgeBaseCategoryManager, self).get_query_set().\
filter(name='test')
class KnowledgeBaseCategory(models.Model):
name = models.CharField(maxlength=100, unique=True)
class Meta:
verbose_name_plural = 'Knowledge Base Categories'
ordering = ('name', )
class Admin:
search_fields = ('name',)
manager = KnowledgeBaseCategoryManager()
def __str__(self):
return self.name
>>> KnowledgeBaseCategory.objects.all()
[<KnowledgeBaseCategory: test>, <KnowledgeBaseCategory: test2>]
}}}
KnowledgeBaseCategory has 2 records with name 'test' and 'test2', but in
admin's change list there is only one record with name 'test' because of
manager attribute of inner Admin class.
Test case 2:
{{{
# KnowledgeBaseCategoryManager is the same
class KnowledgeBaseCategory(models.Model):
name = models.CharField(maxlength=100, unique=True)
test_manager = KnowledgeBaseCategoryManager()
class Meta:
verbose_name_plural = 'Knowledge Base Categories'
ordering = ('name', )
class Admin:
search_fields = ('name',)
def __str__(self):
return self.name
>>> KnowledgeBaseCategory.test_manager.all()
[<KnowledgeBaseCategory: test>]
}}}
Here is custom test_manager returns only 1 record 'test' as expected, but
in admin's change list both 'test' and 'test2' records are displayed.
--
Ticket URL: <http://code.djangoproject.com/ticket/3416#comment:4>
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