On Fri, Feb 20, 2009 at 12:36 AM, Robin B <[email protected]> wrote: > > I have the transactions working, but it is not fully compatible with > web2py DAL, but it could be soon ( needs type coercion, db.table.ALL, > etc) Also in web2py, you cannot set the entity group when inserting, > so transactions will only involve 1 record. (eg atomically read/ > modify/write a counter in a transaction) >
that is great, at least we can do counters !... and how could we specify a parent in a antity with web2py ? is there any simple way ? thanks ! > > If you needed transactions immediately, you could do this: > > from google.appengine.ext import gdb > > def txn(): > post = db.posts[post_id] > post.update_record(title='foo') > return post > > post = gdb.run_in_transaction(txn) > > On a side note, I have batch operations working too. But I recently > read that batch operations are just O(n), which unfortunately means no > joins or efficient batch operations will be possible for now, but I > have not benchmarked it on the real google datastore to know for sure. > > Robin > > > On Feb 19, 3:31 pm, sebastian <[email protected]> wrote: > > Hi All, > > > > is there any schedule for the GAE transactions/entity groups ? > > > > if not, how would it be the best way (web2py upgrades compatible !) to > > use entity groups and transaction with web2py ? > > > > thanks > > > > On Jan 19, 2:59 pm, Robin B <[email protected]> wrote: > > > > > > Groups under the DAL to be a single record. Since Big Table > > > > transactions are limited to one Entity Group pertransaction, this > > > > means that we are limited to one record pertransaction. Right? > > > > > You have it right. > > > > > > In the example above, 'count' is just an example of some arbitrary > > > > column in the record, right? Can I have multiple assignments? Can I > > > > mix lambda and non-lambda assignments? E.g.: > > > > > > row.update_record(count=lambda r: r.count+1, vote_score=lambda r: > > > > calculate_vote_score(), preference='blue') > > > > > Yes, you would be able to mix lamdas/functions and values. > > > > > On the subject of passing lamdas as attributes, the field.default= > > > should also recognize any lambda/callable and call it on demand: > > > > > def uuid(): > > > import uuid > > > return uuid.uuid4() > > > > > db.table.created_at.default=t2.now > > > db.table.uuid.default=uuid > > > > > Robin > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "web2py Web Framework" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/web2py?hl=en -~----------~----~----~----~------~----~------~--~---
