Rails - Jun 2008 - Clean way of creating and validating 2 related models in controller (with STI)?

Hi,

I''ve got really typical problem, but with small twist - need to create
a Foo and Bar objects in a single form with validation of both
objects, where:
Foo.belongs_to :bar
Bar.has_one :foo.

I''ve found really clean way to do it in this tutorial:
http://www.stephenchu.com/2008/03/paramsfu-2-put-attributes-into.html

Code looks like this:
def create
  @foo = Foo.new params[:foo]
  @bar = @foo.build_bar params[:bar] if @foo.is_a? FooBar
  if @foo.save
  ...
end

But the problem is that Foo model has "validates_presence_of :bar_id"
validation, so calling @foo.save causes error on @foo.bar_id. Another
problem is that I''m using STI and Foo is related with Bar only if
it''s
of specific type, which complicates things a bit.

Removing "validates_presence_of :bar_id" solves the problem -
@foo.bar_id is properly assigned and everything works great - but I''d
really like to have this validation there - otherwise I''d have to
change some code in other places (instead of checking for
"foo.bar_id", I''m doing "foo.is_a? FooBar" assuming
that all FooBar
objects have proper foo_id assigned).

Any ideas?

Regards
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---