Thank you, Michael. Tried several combinations but it doesn't work
either.
1. First I tried to use Category.objects.all():
c = Category.objects.all()
serializers.serialize("json", c)
and got the same error.
2. Then tried to init some variable with s[:5] and the result didn't
change.
3. When I use some other model which doesn't refer to itself (is a non
recursive) it works fine even when using with lazy filter calls
similar to my first example.
Anthony
On Apr 1, 5:34 am, Michael <[EMAIL PROTECTED]> wrote:
> Your error is actually coming from the fact that you are not getting
> any results from your filter query. The reason that the error is
> appearing on the second line of your script is because filter is a
> lazy call and isn't really made until you ask it to return objects in
> this bit: s[:5]. Change your filter or call Category.objects.all() it
> should work.
>
> Hope that helps,
> Michael
>
> On Mon, Mar 31, 2008 at 5:39 AM, Legioneer <[EMAIL PROTECTED]> wrote:
>
> > Hi All,
>
> > I'm trying to serialize recursive model (a category which refers to
> > itself) and get a 'DoesNotExist: Category matching query does not
> > exist', while other models work fine. Does anyone know a clue for
> > this?
>
> > I'm doing like this:
>
> > from django.core import serializers;
> > from newproject.models import Category
>
> > s = Category.objects.filter(parent__exact='0')
> > serializers.serialize("json", s[:5])
>
> > and get:
> > Traceback (most recent call last):
> > File "<console>", line 1, in ?
> > File "/usr/lib/python2.3/site-packages/django/core/serializers/
> > __init__.py", line 72, in serialize
> > s.serialize(queryset, **options)
> > File "/usr/lib/python2.3/site-packages/django/core/serializers/
> > base.py", line 48, in serialize
> > self.handle_fk_field(obj, field)
> > File "/usr/lib/python2.3/site-packages/django/core/serializers/
> > python.py", line 41, in handle_fk_field
> > related = getattr(obj, field.name)
> > File "/usr/lib/python2.3/site-packages/django/db/models/fields/
> > related.py", line 209, in __get__
> > rel_obj = self.field.rel.to._default_manager.get(**params)
> > File "/usr/lib/python2.3/site-packages/django/db/models/manager.py",
> > line 69, in get
> > return self.get_query_set().get(*args, **kwargs)
> > File "/usr/lib/python2.3/site-packages/django/db/models/query.py",
> > line 263, in get
> > raise self.model.DoesNotExist, "%s matching query does not exist."
> > % self.model._meta.object_name
> > DoesNotExist: Category matching query does not exist.
>
> > Anthony
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