class BaseModle(models.Model):
  name = models.CharField(max_length=32, unique=True)
 # 商品分类状态 1为上架 0 为下架
  status = models.SmallIntegerField(default=0)
 # 添加时间
  addtime = models.DateTimeField(auto_now_add=True)

  class Meta:
    #抽象
   abstract = True

class Category(BaseModle):

  pass
  class Meta:
    db_table = 'category'  #指定表名

class Goods(BaseModle):
  #商品图片
  img = models.CharField(max_length=255)
  #商品价格  最长9位保留两位小数
  price = models.DecimalField(max_digits=9,decimal_places=2)
  #商品分类外键 级联删除  一对多关系
  cate = models.ForeignKey('Category',on_delete=models.CASCADE)
  class Meta:
    db_table = 'goods'

python manage.py makemigrations

python manage.py migrate