I can't seem to figure out a way to persist a hash attribute in ActiveRecord. Let's say I have a Game, which has a many-to-many with players. Each player has an index, but the array can have empty spaces in it (since a game might not be filled up yet). I'd like to model this using a hash, with position --> player mapping. (What I don't want to do is create a "nil" player). In Hibernate, you would do this with <map>... is there an ActiveRecord equivalent? Thanks, Dave
on 2006-03-27 08:24
on 2006-03-27 09:21
On 3/26/06, David T. <firstname.lastname@example.org> wrote: > (What I don't want to do is create a "nil" player). > > In Hibernate, you would do this with <map>... is there an ActiveRecord > equivalent? > > Thanks, > Dave > It should 'just work', by converting the Hash to YAML, if you assign it to an attribute that maps to a varchar/CLOB column. If that doesn't work because I'm crazy and misremembering something, you could do it 'manually' by calling to_yaml on your Hash as part of the before_save callback. I remember that there's a case statement somewhere in the ActiveRecord code that decides what to do with an attribute based on its Ruby type.. and the "else" branch converts it to YAML.