django queryset for many-to-many field

Question

I have the following Django 1.2 models:

class Category(models.Model):
    name = models.CharField(max_length=255)

class Article(models.Model):
    title = m         


        

Answer 1

Try:

preference = Preference.objects.get(**conditions)
Article.objects.filter(categories__in = preference.categories.all())

Answer 2

Article.objects.filter(categories__in=myPreferenceObject.categories.all())