Thanks - I did a long overdue upgrade of the SDK last week :( In case anyone else hits the same issue, I was using a custom ArrayProperty to store a set of entity IDs in another entity. To fix the problem, I followed these steps:
1. Ran a script to download the ID lists for all entities 2. Update my model changing the property from ArrayProperty to PickleProperty 3. Ran another script that did a get_by_id(), assigned the ID list to the new property (without reading - this throws errors because the old data (array) can't be unpickled) This meant users saw errors while step 3 happened. Luckily there were only 5,000 entities and this only took a couple of minutes. The alternative would be to switch to an Expando model and store the ID list as a dynamic propertry, but this involved more steps and I wasn't confident I could make it work at 4am my time. On Saturday, 19 April 2014 01:15:34 UTC+12, Stefano Ciccarelli wrote: > > > http://googlecloudplatform.blogspot.it/2013/05/update-on-datastore-auto-ids.html > > -- 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/d/optout.
