text: from django.db import models
  
  
  class Area(models.Model):
      name = models.CharField(max_length=20,verbose_name='名称')
      parent = models.ForeignKey('self',on_delete=models.SET_NULL,related_name='subs',null=True,blank=True,
                                 verbose_name='上级行政区划')
  
      class Meta:
          db_table = 'tb_areas'
          verbose_name = '省市区'
          verbose_name_plural = verbose_name
  
      def __str__(self):
          return self.name
  