问题
Trying to figure out the best practice when storing Webapp2 Auth user objects as a reference in a google app engine ndb domain entity.
The 3 ways I can think to do it
class MyEntity(ndb.Model):
users = ndb.UserProperty(repeated=True)
or
class MyEntity(ndb.Model):
users = ndb.StringProperty(repeated=True)
where I would store user id's from the webapp2 User object like
user.get_id()
or
class MyEntity(ndb.Model):
users = ndb.KeyProperty(repeated=True)
where I would store user key from the webapp2 User object like
user.key
I am not sure what is the best practice here? In particular is there any advantage to storing user_id vs key? Assuming UserProperty is the old way of doing things?
回答1:
Avoid UserProperty, store the ID instead.
Straight from the source...
# google/appengine/ext/ndb/model.py:1711
class UserProperty(Property):
"""A Property whose value is a User object.
Note: this exists for backwards compatibility with existing
datastore schemas only; we do not recommend storing User objects
directly in the datastore, but instead recommend storing the
user.user_id() value.
"""
来源：https://stackoverflow.com/questions/15345502/storing-user-objects-in-google-app-engine