Question

I would like to create a Group model in Google App Engine and then have an attribute where I can create a list of UserReferences. The documentation said:

“A property can have multiple values, represented in the datastore API as a Python list. The list can contain values of any of the value types supported by the datastore.”

Would I implement this by creating:

class Group(db.Model):
group_list = db.ListProperty(users.User)

Or might I be better served by simply listing the user entity keys?

http://code.google.com/appengine/docs/python/datastore/entitiesandmodels.html

Answer 1

This depends on your use-case. If you already have a User model, to store additional data about your users, then using a db.ListProperty(Key) for User model keys is probably your best option.