django-fobi/examples/simple/bar/models.py

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from django.db import models
from mptt.models import MPTTModel, TreeForeignKey
class Genre(MPTTModel):
name = models.CharField(max_length=50, unique=True)
parent = TreeForeignKey('self', null=True, blank=True,
related_name='children', db_index=True)
class MPTTMeta:
#level_attr = 'mptt_level'
order_insertion_by=['name']
def __unicode__(self):
return self.name