hi denis! On Nov 22, 12:54 pm, Denis <[EMAIL PROTECTED]> wrote: > >You can now delete an entity directly using its key, without > >instantiating/fetching the Model object > > Good. Will this be documented?
yup, it already is: http://code.google.com/appengine/docs/datastore/functions.html#delete > What happens is I pass non-existing key? On SDK the non-existing > keys seem to be simply ignored. However the documentation suggest an > exception will be raised (it also says an exception will be raised if > the call span multiple entity groups!). hmm, sorry if the documentation is unclear. you're right, deleting a non-existent key is a noop. the docs say "An exception will always be raised *if any error occurs*," and deleting a non-existent key isn't considered an error. also, deleting entities from multiple entity groups is allowed, and even encouraged for efficiency. the "This may happen if the keys in the call span multiple entity groups." sentence refers to the "even if some of the entities actually were deleted" phrase, since deleting entities across entity groups is not atomic. > I'm also concerned about the performance of this deletion. I have a ... > This code works, but works significantly slower (4 times) that the > previous code with preliminary db.get(). It looks like deleting non- > existing records take the same amount of time as deleting an existing > record. > > Is this the SDK issue, or the production will also have such an > issue? as has been discussed before: http://groups.google.com/group/google-appengine/browse_thread/thread/6a712cb3eddb152d http://groups.google.com/group/google-appengine/browse_thread/thread/ba8d4ff7d825214/a5fc345c86a5abf2#a5fc345c86a5abf2 the SDK's performance is not representative of performance in production. also, deleting non-existent keys in production will usually be faster than deleting existing entities. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com 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 -~----------~----~----~----~------~----~------~--~---
