I don't think you can do that for the price of a small operation.
An alternative would be to insert the ID of an entity into memcache
whenever it's accessed for other reasons, then check memcache first
whenever you want to do the existence check.
-
-Vinny P
Technology Media Advisor
Chicago, IL
App Engine Code Samples: http://www.learntogoogleit.com
On Thu, Mar 13, 2014 at 9:41 AM, James Gilliam jimgill...@gmail.com wrote:
i thought there was a way to see if a database key exists for the price of
one small operation?
doing keyobj = Key.from_path, followed by filter( '__key__ =', keyobj ),
followed by query.get() using key only query, you are charged one large and
one small operation and only get the key returned.
using, get_by_key_name you are charged one large operation, receives the
entire entity, and it takes longer than the previous.
i have concluded there is no way to check if a key exists for the price of
a small operation.
does anybody know if there is a way to check whether a key exists for just
one small operation?
thank you
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