RESTful Rails + Collections...

Folks,

Trying to get my head around this - and I've made it work, but it feels
rather hackish.

Let's say I have two resource types: User and Widget. A User has many
Widgets, a Widget belongs to a User

In routes.rb I have Widgets mapped as a nested resource:

map.resources :users do |users|
  users.resources :widgets
end

In an ideal world, I'd like to be able to submit many Widgets to
users/1/widgets via user_widgets_url, which, for a single resource would
look like:

<% form_for([@user, @widget], :url => user_widgets_url) do |f| %>
  <%= f.text_field :some_widget_field %>
   ...
<% end %>

That would then post to user/1/widgets (invoking the create method) and
all would be well with little controller code.

But what if I wanted to submit many distinct widgets in this form submit
(effectively creating n number of new Widgets associated to a User)? I
realize that RESTful resources are by-and-large created to work with
single instances of a resource (outside of index) but what if that
'resource' is a collection.

I've seen the nested_resources examples in documentation but in most
cases it sets up something like this in user.rb:

def widgets_attributes=(attributes)
    # Process the attributes hash
end

And then utilizes fields_for in my template to write out the appropriate
fields for a widget...

Is that really the convention? Seems like I'd want to post to the
widgets controller as that's the 'resource' in question?

So - in summary - what's the current idiom for posting a collection of
resources? Post to the controller associated with the resource
(widgets_controller) *or* set up widgets_attributes in user.rb?

Too much? Thanks in advance folks!
Cory