Question

Django Save方法需要两次更新模型实例才能工作。

应用程序具有以下保存方法，可根据ID生成唯一ID。

def save(self, *args, **kwargs):

    if self.id and not self.fid:
        self.fid = encode(self.id)

实际上它只适用于模型实例保存两次，第一个FID为无。

Answer 1

def save(self, *args, **kwargs):
    # save the instance, do this first so that we have an id
    super(MyModelClass, self).save(*args, **kwargs)
    # if it was a new instance fid is not set yet
    if self.id and not self.fid:
        self.fid = encode(self.id)
        # save the instance again now that we've set fid
        super(MyModelClass, self).save(*args, **kwargs)

Django Save方法需要两次更新模型实例

1 个答案: