无法从 Django 模型中的两个数据库中删除实例

Question

当用户在管理员中删除它时，我试图删除两个数据库中的模型实例。当他们创建一个新实例并保存它时，它会转到两个数据库。但是我无法从两个数据库中删除它，因为第一次调用 delete 删除了实例，所以第二次调用会引发断言错误。有没有办法捕获实例并同时从两个数据库中删除它们？

class Change(models.Model):
    content = models.TextField()
    date = models.DateField(auto_now = True)

    def save(self):
        super(Change, self).save(using='default')
        super(Change, self).save(using='labs')

    def delete(self):
        #Here it is deleted from the default database.
        super(Change, self).delete(using='default')
        #This doesn't work because Ive deleted the instance. How do I get this to work as well?
        super(Change, self).delete(using='labs')

Answer 1

如果两个数据库，您确定实例具有相同的 pk 值吗？如果是，那么您应该在从第二个数据库删除之前恢复实例的 pk：

def delete(self):
    pk = self.pk
    super(Change, self).delete(using='default')
    self.pk = pk
    super(Change, self).delete(using='labs')

无法从 Django 模型中的两个数据库中删除实例

Can't delete instance from two databases in Django model

django

django-models