google-app-engine - Overwritting ndb.Model constructor

Question

I have an nbd model defined as such:

class Attachment(ndb.Model):

    id              = ndb.StringProperty(indexed=True)
    mime_type       = ndb.StringProperty()
    contents        = ndb.StringProperty()
    modified_date   = ndb.DateTimeProperty(auto_now_add=True)

    def __init__(self, *args, **kwargs):
        super(Attachment, self).__init__(*args, **kwargs)

As per documentation and coincidentally BDFL's direction, you can overwrite __init__ in a ndb.Model subclass by calling the above super(); however, every time I'm trying to create a new instance as follows: Attachment(id='such',mime_type='img/jpeg') keeps throwing errors that those args are unexpected.

What am I missing? Your help is much appreciated.

Answer 1

好吧，看来我搞砸了模型定义并且由于上帝的安排而工作。相关文件：

您不能轻易定义名为“key”、“id”、“parent”或“namespace”的属性。例如，如果您在构造函数或 populate() 调用中传递 key="foo"，它会设置实体的键，而不是名为“key”的属性属性。