在这里以购物网站商品分类为例
class GoodsCategory(models.Model):
"""
商品类别
"""
CATEGORY_TYPE = (
(1, "一级类目"),
(2, "二级类目"),
(3, "三级类目"),
)
name = models.CharField(default="", max_length=30, verbose_name="类别名", help_text="类别名")
code = models.CharField(default="", max_length=30, verbose_name="类别code", help_text="类别code")
desc = models.TextField(default="", verbose_name="类别描述", help_text="类别描述")
category_type = models.IntegerField(choices=CATEGORY_TYPE, verbose_name="类目级别", help_text="类目级别")
# 自表关联 外键为 'self'
parent_category = models.ForeignKey("self", null=True, blank=True, verbose_name="父类目级别", help_text="父目录",
related_name="sub_cat")
is_tab = models.BooleanField(default=False, verbose_name="是否导航", help_text="是否导航")
add_time = models.DateTimeField(default=datetime.now, verbose_name="添加时间")
class Meta:
verbose_name = "商品类别"
verbose_name_plural = verbose_name
def __str__(self):
return self.name
parent_category=models.ForeignKey("self",null=True,blank=True,related_name="sub_cat")
因为一级类的商品没有它的父类了,所以null=True需要写一下
商品类型表.png
本文为个人学习记录所用
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