Django model更改继承的类时需要的默认值

来源：互联网发布：可可通改号系统源码编辑：程序博客网时间：2024/05/16 17:42

Shop原来是继承models.Model的，现在继承BaseModel

class BaseModel(models.Model):    """    基类    """    is_valid = models.BooleanField(default=True, verbose_name=u'有效性')    created = models.DateTimeField(auto_now_add=True, verbose_name=u'创建时间')    modified = models.DateTimeField(auto_now=True, verbose_name=u'修改时间')    class Meta:        abstract = True    def valid_action(self, valid=True):        self.isvalid = valid        self.save()class Shop(BaseModel):    shopId = models.AutoField(u'商店编号', primary_key=True)    shopName = models.CharField(u'商店名称', max_length=50)    shopUrl = models.CharField(u'商店网址', max_length=100)    # def to_json_string(self):    #     return json.dumps(self.__to_dict__(), ensure_ascii=False).decode('utf-8').encode('gb2312')    def to_dict(self):        return {            'shop_id': self.shopId,            'shop_name': self.shopName,            'shop_url': self.shopUrl,        }    def __unicode__(self):        return 'shopId=' + str(self.shopId) + ' shopName=' + self.shopName

如果不写

class Meta:        abstract = True

在makemigration时会出现

加上

class Meta:        abstract = True

将基类设置为抽象类，就不会要求填写默认值了

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