You might be able to use get_or_insert() and benefit from the in-memory cache.
On Tue, Mar 27, 2012 at 13:49, Andreas <[email protected]> wrote: > exactly what im doing. i create the keys myself. > > rootkey = ndb.Key('root', 'key') > a = Asset(key=ndb.Key('Asset', 'keyname', parent=rootkey)) > > a._has_complete_key() # returns true > > in my app i work in with entity batches and sometimes it happens that i need > to create ancestors for that entity which could already exist so till now i > used is_saved() to filter out the entities that are already saved to the > datastore to avoid putting them again (or at least trying to put them again) > > > On Mar 27, 2012, at 3:38 PM, Guido van Rossum wrote: > > On Tuesday, March 27, 2012 6:41:25 AM UTC-7, aschmid wrote: >> >> is there an equivalent of the db.Model function is_saved() with ndb.Model? > > > No; what are you trying to do? You might be able to check whether the entity > has a key and if so, whether that key isn't incomplete: > > if ent.key and ent.key.id(): > # It has a complete key. > else: > # Hasn't been written, ever. > > However this can be fooled if you explicitly set the key or the id when you > create an entity, e.g. > > ent = Employee(id='joe') > > or > > ent = Employee(key=ndb.Key(Employee, 'joe')) > > (These two are equivalent.) > > --Guido van Rossum > > -- > 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/-/MeORtJLdaqEJ. > 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. -- --Guido van Rossum (python.org/~guido) -- 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.
