Yes, and it did not work. I cannot fix all the data, as the cost would be quite large. This leaves giving up doing what I wanted to do in Python, or fetching the underlying data without a model. Luca
On Wednesday, July 10, 2013 12:07:25 AM UTC-7, timh wrote: > > Have you tried setting the default value to [] as per that error ? > > If your model is blowing up you can always fetch the underlying data > without a model, fix the data up and write it back. > > T > > On Wednesday, July 10, 2013 9:56:50 AM UTC+8, Luca de Alfaro wrote: >> >> This is pretty bad! >> >> As pointed out in >> https://code.google.com/p/googleappengine/issues/detail?id=8962 , if you >> add a StringListProperty to a model with existing entities in the >> datastore, then you cannot read those entities any more! >> Furthermore, in Java it is apparently possible to write entities with >> null StringListProperty fields. Those entities cannot then be read from >> Python! >> These are pretty big problems -- is there any solution? >> >> Luca >> >> On Tuesday, March 23, 2010 5:57:17 AM UTC-7, Geoffrey Spear wrote: >>> >>> On Mar 22, 11:09 pm, dhruvbird <dhruvb...@gmail.com> wrote: >>> > Hello, >>> > I have a model with a single attribute that is a StringListProperty. >>> > I get an error if I define it as such: >>> > >>> > class Test(db.Expando): >>> > people = db.StringListProperty(required=False, indexed=True) >>> > >>> > However, on changing it to: >>> > class Test(db.Expando): >>> > people = db.StringListProperty(required=True, indexed=True, >>> > default=[]) >>> > >>> > It starts working. Any ideas why this is happening?? >>> >>> ListPropertys are always required; you can't set their value to None. >>> If a particular entity has no values for the ListProperty, you need to >>> set it to the empty list. (Note that you can still set a default >>> value of 'None', which magically uses an empty list, not None, as the >>> default value.) >>> >>> -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. Visit this group at http://groups.google.com/group/google-appengine. For more options, visit https://groups.google.com/groups/opt_out.
