Question

On the Google App Engine, I have a webapp2 model like this:

def Person(db.model):
    first_name = db.StringProperty()
    surname = db.StringProperty()
    languages_spoken = db. ListProperty()

However, I’d like to have the languages_spoken list constrained to a list of options, say English, French, and Spanish, that can change as time goes on. With SQL this would be easy with person, language, and person_language tables (or similar) but I can’t get my head round how to do it in this case, or even if it’s possible. Any suggestions anyone?

Answer 1

In the end I went with this, thanks to the pointers from the two other answers:

from google.appengine.ext import ndb

languages = ['English', 'French', 'Spanish']

def Person(ndb.model):
    first_name = ndb.StringProperty()
    surname = ndb.StringProperty()
    languages_spoken = ndb.StringProperty(repeated=True, choices=languages)