Message info
 
To: From:Django Subject:[Django] #17930: Error in Queryset with operator | (union queryset) + slice Date:Sun, 18 Mar 2012 15:31:05 -0000
 

#17930: Error in Queryset with operator | (union queryset) + slice
----------------------------------------------+----------------------------
Reporter: vini.gracindo@ | Owner: nobody
Type: Bug | Status: new
Component: Database layer (models, ORM) | Version: 1.3
Severity: Normal | Keywords: queryset
Triage Stage: Unreviewed | union, slice
Easy pickings: 0 | Has patch: 0
| UI/UX: 0
----------------------------------------------+----------------------------
{{{
class Example:
name = models.CharField(max_length = 30)
public = models.BooleanField()
}}}

>>> Example.objects.create('example 1', False)
<Example: Example object>
>>> Example.objects.create('example 2', False)
<Example: Example object>
>>> Example.objects.create('example 3', True)
<Example: Example object>
>>> Example.objects.create('example 4', True)
<Example: Example object>
>>> Example.objects.create('example 5', False)
<Example: Example object>
>>> query = Example.objects.filter(public = True)
>>> if(query.count() < 3):
... query = query | Example.objects.filter(public =
False).order_by('?')[:1]
...
>>> query.count()
5
>>>

When using the union of querysets to slice it "ignores" the slice and
takes all objects where public = false.

--
Ticket URL: <https://code.djangoproject.com/ticket/17930>
Django <https://code.djangoproject.com/>
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