text: from django.db import models
  
  
  class Area(models.Model):
      """省市区"""
      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 = '省市区'
  
      def __str__(self):
          return self.name
  
  