Panda Beer wrote:
> Hi all ,
> I have a habtm relation between 2 tables:
> - users
> - rights
>
> If there a way to affect a destroy dependance on those 2 tables only for
> the last instance? In my opinion, dependent => :destroy is not the
> solution because this delete all the linked instance.
>
>
> For example, if I have:
> # in User model this:
> - "Joooooo"
> - "Jeannnn"
> - "Tommmm"
> # in Right model this:
> - "Write"
> - "Read"
> # in the habtm relation this:
> - "Joooooo" can "Write"
> - "Joooooo" can "Read"
> - "Jeannnn" can "Read"
>
> I would like to be able to delete "Read" in Right model, and automaticly
> deleting "Jeannnn" user too, because this user have no other right. But
> without deleting "Joooooo" user (because he remains have a right named
> "Write").
Perhaps something like:
class Right
after_destroy do
User.find(:all, :uniq => true, :joins => :rights,
:conditions => 'rights.id is NULL').each(&:destroy)
end
end
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