The appengine docu says on repeated ndb properiertes, that:
附属引擎在重复的ndb properiertes上说:
When updating a repeated property, you can either assign it a new list or mutate the existing list in place.
当更新一个重复的属性时，您可以为它分配一个新的列表，或者修改现有的列表。
https://developers.google.com/appengine/docs/python/ndb/properties#repeated
https://developers.google.com/appengine/docs/python/ndb/properties重复
Two questions:
两个问题:
-
do I save write operations when I just mutate the list, instead of putting a new list in place?
当我只是修改列表的时候，我是否保存了写操作，而不是将一个新的列表放在适当的位置?
-
how do I do exactly the mutation? just append the object and delete items within the list as I would do it with a list in python?
我该怎么做这个突变呢?只是添加对象并删除列表中的项，就像我在python中使用列表那样?
Thanks!
谢谢!
1 个解决方案
#1
6
Yes you have it correct in your mind.
是的，你的想法是对的。
- No you don't save because it's still a write operations with the applied costs.
- 不，你不保存，因为它仍然是一个写操作和应用的成本。
- Yes exactly like that. Appending like a normal list, deleting, etc etc.
- 是的一模一样。附加像一个普通的列表，删除等。
#1
6
Yes you have it correct in your mind.
是的，你的想法是对的。
- No you don't save because it's still a write operations with the applied costs.
- 不，你不保存，因为它仍然是一个写操作和应用的成本。
- Yes exactly like that. Appending like a normal list, deleting, etc etc.
- 是的一模一样。附加像一个普通的列表，删除等。