class UserGroup < ActiveRecord::Base
has_many :users, :dependent => :destroy
end
class User < ActiveRecord::Base
belongs_to :user_group
validates_presence_of :user_group_id
end
user_group = UserGroup.new
user_group.users.build
user_group.save!
Tells me that users is invalid and it says that user group cant be
blank. In the docs it says if I do this I should not get this error. Is
this a new edition to ActiveRecord or something? I am using edge rails.
Thanks!
--
Posted via http://www.ruby-forum.com/.
To my mind the API doc's advice to validate presence of foreign keys
rather than associations is wrong, as I have written about before:
http://groups.google.com/group/rubyonrails-talk/msg/0c827209dd10e767
Validating the presence of associations is the Rails equivalent of
DB fk constraints. Validating the presence of foreign_key attributes
just checks that they're not null. They could still point to
non-existent records.
--
We develop, watch us RoR, in numbers too big to ignore.
> http://groups.google.com/group/rubyonrails-talk/msg/0c827209dd10e767
>
> Validating the presence of associations is the Rails equivalent of DB fk
> constraints. Validating the presence of foreign_key attributes just
> checks that they're not null. They could still point to non-existent
> records.
Ohh, thanks for the information.
-Thufir