The latest version of django-mptt automatically sets your default model manager
objects to the built in TreeManager() model manager in django-mptt.
But what if you already have a default custom model manager
Assuming we have the following:
class Area(MPTTModel): name = models.CharField(max_length=250) slug = models.SlugField(editable=False) url = models.URLField(verbose_name='URL', blank=True) tree = TreeManager() objects = AreaQuerySet.as_manager()
In order to preserve both of your managers, the MPTT TreeManager() need to be placed before the objects manager.
Hopefully this helps someone else having trouble with this issue.