问题描述
限时送ChatGPT账号..我正在利用 ndb 的 to_dict 方法将对象的属性转换为 python dict.据我所知,根据文档,此方法在字典中不包含对象的键或父项:
I am leveraging ndb's to_dict method to convert an object's properties into a python dict. From everything I can tell, this method does not include the object's key or parent within the dict as per the documentation:
https://developers.google/appengine/docs/python/ndb/modelclass#Model_to_dict
但是,对于我的情况,我需要将密钥放在 dict 中.我更喜欢利用内置方法并将其子类化或类似的东西,而不是创建我自己的 to_dict 方法.
However for my situation I need the key to be in the dict. My preference would be to leverage the builtin method and subclass it or something similar rather than create my own to_dict method.
实现这一目标的最佳方法是什么,或者我是否遗漏了一些明显的东西?提前致谢.
What is the best way to accomplish this or am I missing something obvious? Thanks in advance.
仅供参考:我没有在这个项目中使用 django,而是直接将 python 部署到 gae.
FYI: I am not leveraging django for this project but instead straight python deployed up to gae.
推荐答案
你没有遗漏任何东西 ;-)
You're not missing anything ;-)
调用to_dict后把key添加到字典中,yes覆盖该方法.
Just add the key to the dictionary after you call to_dict, and yes override the method.
如果您有多个模型与您的自定义 to_dict 不共享相同的基类,我会将其实现为 mixin.
If you have multiple models that don't share the same base class with your custom to_dict, I would implement it as a mixin.
将 to_dict 定义为 Mixin 类的方法.你会
to define to_dict as a method of a Mixin class. you would
class ModelUtils(object):
def to_dict(self):
result = super(ModelUtils,self).to_dict()
result['key'] = self.key.id() #get the key as a string
return result
然后使用它.
class MyModel(ModelUtils,ndb.Model):
# some properties etc...
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