The tastypie-generic from achur

handling Lazy import

Hi,
Is there a particular reason that explains why the lazy import are not handled in the GenericForeignKey?
What would be great is if it was possible to do something like this:
content_object = GenericForeignKeyField({
'module.User': 'module.UserResource',
'module.Event': 'module.EventResource',
}, 'content_object')

In that case, the objects, passed as string, would be imported at runtime only. That would avoid circular inclusion conflicts in some case...

Thanks for your work on this repo :)

Seem to doesn't work on Django 1.4

I try to use tastypie-generic on Django 1.4 (Python 2.6.6 -> Debian 6.0.5) with the last version of tastypie (easy_install django tastypie tastypie-generic). But I always got an error :

'str' object has no attribute 'creation_counter'

<response>
<error_message>'str' object has no attribute 'creation_counter'</error_message>
<traceback>
Traceback (most recent call last): File "/home/developer/.virtualenvs/mysoft_core/lib/python2.6/site-packages/django_tastypie-0.9.11-py2.6.egg/tastypie/resources.py", line 192, in wrapper response = callback(request, *args, **kwargs) File "/home/developer/.virtualenvs/mysoft_core/lib/python2.6/site-packages/django_tastypie-0.9.11-py2.6.egg/tastypie/resources.py", line 397, in dispatch_list return self.dispatch('list', request, **kwargs) File "/home/developer/.virtualenvs/mysoft_core/lib/python2.6/site-packages/django_tastypie-0.9.11-py2.6.egg/tastypie/resources.py", line 427, in dispatch response = method(request, **kwargs) File "/home/developer/.virtualenvs/mysoft_core/lib/python2.6/site-packages/django_tastypie-0.9.11-py2.6.egg/tastypie/resources.py", line 1037, in get_list to_be_serialized['objects'] = [self.full_dehydrate(bundle) for bundle in bundles] File "/home/developer/.virtualenvs/mysoft_core/lib/python2.6/site-packages/django_tastypie-0.9.11-py2.6.egg/tastypie/resources.py", line 654, in full_dehydrate bundle.data[field_name] = field_object.dehydrate(bundle) File "/home/developer/.virtualenvs/mysoft_core/lib/python2.6/site-packages/django_tastypie-0.9.11-py2.6.egg/tastypie/fields.py", line 621, in dehydrate foreign_obj = getattr(bundle.obj, self.attribute) File "/home/developer/.virtualenvs/mysoft_core/lib/python2.6/site-packages/Django-1.4-py2.6.egg/django/contrib/contenttypes/generic.py", line 121, in __get__ f = self.model._meta.get_field(self.ct_field) File "/home/developer/.virtualenvs/mysoft_core/lib/python2.6/site-packages/Django-1.4-py2.6.egg/django/db/models/options.py", line 291, in get_field if f.name == name: File "/home/developer/.virtualenvs/mysoft_core/lib/python2.6/site-packages/Django-1.4-py2.6.egg/django/db/models/fields/__init__.py", line 128, in __cmp__ return cmp(self.creation_counter, other.creation_counter) AttributeError: 'str' object has no attribute 'creation_counter'
</traceback>
</response>

here my model:

class   MetaData(models.Model):
    key      = models.CharField(max_length = 100)
    _value = models.TextField(db_column='value', blank=True)

    def set_value(self, value):
        self._value = base64.encodestring(value)

    def get_value(self):
        return base64.decodestring(self._value)

    value = property(get_value, set_value)

    content_type    = models.ForeignKey(ContentType)
    object_id          = models.PositiveIntegerField()
    content_object = generic.GenericForeignKey(content_type, object_id)

    class Meta:
        app_label = "core"
        permissions = (
            ('can_view_metadata','Can view meta data'),
            )

and here my Resource:

class   MetaDataResource(ModelResource):
    content_object = GenericForeignKeyField({
            Article : ArticleResource,
            }, 'content_object')

    class       Meta:
        queryset       = MetaData.objects.all()
        resource_name  = 'metadata'
        authentication = ApiKeyAuthentication()
        authorization  = DjangoAuthorization()
        excludes       = ['object_id']

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handling Lazy import

Seem to doesn't work on Django 1.4

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