get_or_insert: Was it get or insert?

[vivpuri]

When get_or_insert is used, is there a way to tell if it is a "get" or
the entity was really inserted?


Thanks

[Robin B]

You can view the source of get_or_insert and see that it only returns
the entity:

@classmethod
def get_or_insert(cls, key_name, **kwds):
def txn():
entity = cls.get_by_key_name(key_name, parent=kwds.get
('parent'))
if entity is None:
entity = cls(key_name=key_name, **kwds)
entity.put()
return entity
return run_in_transaction(txn)

Try adding this modified classmethod to your model:

@classmethod
def get_or_insert2(cls, key_name, **kwds):
def txn():
entity = cls.get_by_key_name(key_name, parent=kwds.get
('parent'))
if entity is None:
entity = cls(key_name=key_name, **kwds)
entity.put()
return (True,entity)
return (False,entity)
return run_in_transaction(txn)

Use it like this:

inserted,entity = MyModel.get_or_insert2('foobar',**attrs)
if inserted:
print "inserted"
else:
print "existing"


Robin

[Sylvain]

Check this cookbook :

http://appengine-cookbook.appspot.com/recipe/efficient-use-of-get_or_insert/?id=ahJhcHBlbmdpbmUtY29va2Jvb2tylgELEgtSZWNpcGVJbmRleCI8YWhKaGNIQmxibWRwYm1VdFkyOXZhMkp2YjJ0eUZ3c1NDRU5oZEdWbmIzSjVJZ2xFWVhSaGMzUnZjbVVNDAsSBlJlY2lwZSI9YWhKaGNIQmxibWRwYm1VdFkyOXZhMkp2YjJ0eUZ3c1NDRU5oZEdWbmIzSjVJZ2xFWVhSaGMzUnZjbVVNMQw

[ryan]

...and consider starring this issue: http://code.google.com/p/googleappengine/issues/detail?id=1030