from tutorial part 03:
------------------------
from django.http import Http404
# ...
def detail(request, poll_id):
try:
p = Poll.objects.get(pk=poll_id)
except Poll.DoesNotExist:
raise Http404
return render_to_response('polls/detail.html', {'poll': p})
------------------------
but........, you can use "get_object_or_404(<model>, <attr=filter>)"
shortcut and catch a http404 exception...
it's more clean =)
Sergio Durand
Info Cascade escreveu:
> I just want to catch the exception thrown when the query returns nothing.
> Thanks, that seems to have done the trick.
>
> [EMAIL PROTECTED] wrote:
>
>> I'm not sure where you got that code snippet from, but DoesNotExist is
>> an attribute on model classes, so that shoul read:
>>
>> except Tag.DoesNotExist.
>>
>> On Dec 8, 2:52 pm, Info Cascade <[EMAIL PROTECTED]> wrote:
>>
>>
>>> How do I import the DoesNotExist exception?
>>>
>>> This doesn't seem to work:> from django.db.models.query import DoesNotExist
>>>
>>>
>>>> try:
>>>> tag = Tag.objects.get(name=cat_name)
>>>> except DoesNotExist:
>>>> # do something else
>>>>
>>>>
>>> Doesn't DoesNotExist exist?
>>>
>>>
>>>
>>
>>
>
>
> >
>
>
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