like this? You run a query with an extra option specify the ref fields to pre-fetch. and then it would query all the referenced rows in a smart way (only fetch a record 1x). Is there a generally accepted way to handle this (in the absence of the mentioned feature)? Right now I'm fetching my rows and loop over it and store the referenced rows in a dictionary and at the end use the dict to store the fetched rows on the parent rows. Then a pass the composite thing to my view.
On Tuesday, August 13, 2013 4:24:49 PM UTC+2, Anthony wrote: > Yes, the reference fields execute a query each time when you access their > attributes -- there is no caching. I think it might be a good idea to > implement caching as an option. Even better, there should be an option to > fetch the related records for all rows along with the initial select, > either via a join or a single additional select -- this would be much more > efficient than running a separate select for each row when you've got lots > of rows. > > Anthony > > On Tuesday, August 13, 2013 3:34:37 AM UTC-4, Quint wrote: >> >> Hello web2py users, >> >> I have a question about reference fields. >> >> When i access a attribute of a reference Field, i notice that the >> reference field is represented by an instance of the "Reference" class. >> When i access attributes on that reference , will it perform a new query >> each time or does it cache previous queries somehow? >> >> BTW, I'm using *GAE* >> >> Example: >> >> I have a table "comment" which has a reference field "author auth_user" >> Now i perform a query and i retrieve a list of comments which contains a >> lot of comments from the same user. >> When i access a attribute on those comments will it query the auth_user >> table for all comments of the same author? >> >> Thanks and regards. >> > -- --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
