Hi. Given: class Group < AR has_many :users end Is it in any way possible to retain reference to the old users when they get replaced using group.users=(new_users) ? The below doesn't work but illustrates what I'm looking for: class Group < AR has_many :users def users=(new_users) @old_users = users write_attribute('users', new_users) end end I need to examine the differences when related objects (in this case users) change. Morten
on 2007-08-02 23:04
on 2007-08-02 23:19
> The below doesn't work but illustrates what I'm looking for: > > class Group < AR > has_many :users > def users=(new_users) > @old_users = users > write_attribute('users', new_users) > end > end I'm currently doing something like this: class Group < AR has_many :users def validate_on_update old_users = Group.find(id).users #Do the checks here.. end end But that's nasty. Anyone know if there's a plugin that allows AR to contain a version of the object in the state it had as it got read from the DB for later comparison?