``
class Area(models.Model):
Area_Level = (
(0, u'全国'),
(1, u'省、直辖市'),
(2, u'市、直辖市区'),
(3, u'区、县等'),
)
areaname = models.CharField(max_length=30,unique=True, verbose_name='区域名称')
code = models.CharField(max_length=20,blank=True, default="", verbose_name='区域代码')
parentid = models.IntegerField(verbose_name='父级id', null=True)
level = models.IntegerField(choices=Area_Level,verbose_name='层级', null=True)
object.get_level_display