Python-сообщество

Пожалуйста, помогите с правильной выборкой.

Модель:

class FSite(models.Model):
    name = models.CharField(max_length=50)
    url = models.URLField(unique=True)
    description = models.TextField()
    rss_feed = models.URLField(unique=True)
    favicon = models.ImageField(upload_to='favicons/')
    
    def __unicode__(self):
        return self.name

class MetaCategory(models.Model):
    f_site = models.ForeignKey(FSite)
    meta_category = models.CharField(max_length=50)
    
    def __unicode__(self):
        return self.meta_category

class Category(models.Model):
    meta = models.ForeignKey(MetaCategory)
    category = models.CharField(max_length=70)
    
    def __unicode__(self):
        return self.category

category_object = Category.objects.get(category=category, meta__f_site__name=freelance_site)

Как именно не работает? Ошибку покажите.

Traceback:
File “C:\Python26\lib\site-packages\django\core\handlers\base.py” in get_response
92. response = callback(request, *callback_args, **callback_kwargs)
File “C:\Documents and Settings\Istergul\workspace\freeparse\..\freeparse\web\views.py” in test
139. meta__freelance_site__name=freelance_site)
File “C:\Python26\lib\site-packages\django\db\models\manager.py” in get
120. return self.get_query_set().get(*args, **kwargs)
File “C:\Python26\lib\site-packages\django\db\models\query.py” in get
300. num = len(clone)
File “C:\Python26\lib\site-packages\django\db\models\query.py” in __len__
81. self._result_cache = list(self.iterator())
File “C:\Python26\lib\site-packages\django\db\models\query.py” in iterator
238. for row in self.query.results_iter():
File “C:\Python26\lib\site-packages\django\db\models\sql\query.py” in results_iter
287. for rows in self.execute_sql(MULTI):
File “C:\Python26\lib\site-packages\django\db\models\sql\query.py” in execute_sql
2369. cursor.execute(sql, params)
File “C:\Python26\lib\site-packages\django\db\backends\util.py” in execute
19. return self.cursor.execute(sql, params)

Exception Type: ProgrammingError at /test/
Exception Value: can't adapt

category и freelance_site какого типа?

Проблему решила )

Mutagena
как?