Question

Is there any way to do a query in GAE where I have a list of userId‘s, and I want to fetch all User‘s with userId in the list.

Something like query.filter("userId IN", userIdList)

If this is not possible, what’s the closest alternative?

Answer 1

This is trivial if you fetch by key instead of running a query. If your user objects have their user id as their entity key, then you can do this:

# assume userIdList is a list of ints that are entity key ids
user_keys = [ndb.Key('User', k) for k in userIdList]
users = ndb.get_multi(user_keys)