BTW, there's a built-in '__version__' property of '__entity_group__' that could be used instead of an auto-updated timestamp:
https://developers.google.com/appengine/docs/python/datastore/metadataentityclasses#EntityGroup https://developers.google.com/appengine/docs/python/ndb/metadata On Wed, Oct 17, 2012 at 8:23 AM, Sameer Lodha <[email protected]> wrote: > This would require Custom Logic to be implemented by you. > > My suggestion... > 1. Define an auto-update time-stamp property for each Entity Group > 2. Write Logic to Download Data based on the time-stamp > 3. If required, store the Last downloaded time-stamp value for each Entity > Group, so that you may proceed from there in the next iteration. > > The above is what we have implemented for incremental offline backups. > > > On Wed, Oct 17, 2012 at 12:15 AM, Mikhail Dubov <[email protected]> wrote: >> >> Just read an article on how to download data from AppEngine Datastore: >> https://developers.google.com/appengine/docs/python/tools/uploadingdata >> >> It's a great tutorial, but, as far as I can see, it says nothing on >> whether it is possible to download entities from Datastore that were created >> after a specific date, which is actually my current need - I want to >> download my data periodically and each time I do this it would be >> preferrable to get the new/updated entities only. So, is that possible? >> >> Thanks, >> Mikhail >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Google App Engine" group. >> To view this discussion on the web visit >> https://groups.google.com/d/msg/google-appengine/-/R4N9oJ-rOUkJ. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/google-appengine?hl=en. > > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
