GAE does not support transactions across multiple tables. You can put your
dal code into a function as in
def mydblogic(*args):
.... db.insert....db().update....db(0.select....
and run it with
from google.appengine.ext import db as gae
gae.run_in_transaction(mydblogic, *args)
On Thursday, 29 November 2012 04:18:47 UTC-6, José Manuel López Muñoz wrote:
>
> I'm making a room reservation system in Web2Py over Google App Engine.
> When a user is booking a Room the system must be sure that this room is
> really available and no one else have reserved it just a moment before. To
> be sure I make a query to see if the room is available, then I make the
> reservation. The problem is how can I do this transaction in a kind of
> "Mutual exclusion" to be sure that this room is really for this user?
>
> Thank you!! :)
>
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