Thank you all for the answers, I finally have created a function and run it in a transaction. Regards.
On Thursday, November 29, 2012 11:18:47 AM UTC+1, 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!! :) > --
