On Wednesday, June 3, 2015 at 10:06:58 AM UTC-7, ivan sisovic wrote: > > When there is many_to_many association between Books and Users > > What is the best way (fastest) to delete all Users with no books. >
Probably something like this: User.exclude(:id=>DB[:books_users].select(:user_id)).delete Basically, delete all users that don't have an entry in the join table. Thanks, Jeremy -- You received this message because you are subscribed to the Google Groups "sequel-talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sequel-talk. For more options, visit https://groups.google.com/d/optout.
