Ok, I solved the recursive import problem and tried to improve my
understanding of what is going on.
Now I have:
class TagManager(models.Manager):
def get_query_set(self):
return TagQuerySet
class Tag(models.Model):
# ...
objects = TagManager()
class TagQuerySet(models.query.QuerySet):
model = Tag
When I try to access the manager, I get the following exception:
"unbound method get() must be called with TagQuerySet instance as
first argument (got nothing instead)"
I think this means "the get_query_set should return an instance of the
TagQuerySet".
But Malcolm states in the post mentioned above:
> Sub-class the QuerySet class and have your model's manager return your
> subclass as the result of get_query_set() rather than the current
> QuerySet instance that is returned.
Can anyone tell me how to do this?
Thanks...
On 21 Eylül, 11:19, omat <[EMAIL PROTECTED]> wrote:
> Hi,
>
> I have a custom manager for a Tag model and I want to apply its
> methods also to Tag querysets, not just to "Tag.objects".
>
> There has been a discussion on this
> here:http://groups.google.com/group/django-users/browse_thread/thread/3d00...
>
> but what Malcolm suggested is not very clear to me. I think I get it
> wrong, but here is what I've tried:
>
> class TagQuerySet(models.query.Query):
> model = Tag
>
> class TagManager(models.Manager)
> # ...
> def get_query_set(self):
> return TagQuerySet
>
> def my_filter(self):
> # calculate the query set
> # ...
> return get_query_set().my_filter(*args, **kwargs)
>
> I doubt that this will work, but in the first place I have a circular
> reference problem while importing. TagQuery class needs Tag to be
> defined, Tag needs TagManager to be defined and TagManager needs
> TagQuery to be defined.
>
> Thanks for any help...
> oMat
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