On Sun, Mar 14, 2010 at 5:53 PM, B <[email protected]> wrote: > If I passed a list of key ids as an argument in a transaction, would > the change associated with the first key in the list happen first? And > if not, how do I specify the order that I want the changes to happen > in? > > As a concrete example, consider this code below from Google > Docshttp:// > code.google.com/appengine/docs/python/datastore/transactions.html---would > changes to the first item in acc.key() happen first? > > class Accumulator(db.Model): > counter = db.IntegerProperty() > > Docshttp:// > code.google.com/appengine/docs/python/datastore/transactions.html: > def increment_counter(key, amount): > obj = db.get(key) > obj.counter += amount > obj.put() > > q = db.GqlQuery("SELECT * FROM Accumulator") > acc = q.get() > db.run_in_transaction(increment_counter, acc.key(), 5) > > > > -- > 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]<google-appengine%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. > >
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