*hiya!*

I have a problem with named routes and has_one
(Rails 1.99.1)

My example:
class Car  < ActiveRecord::Base
  has_one :wheel
end

--- config/routes.rb
map.resources wheels
map.resources cars, :has_one => [ :wheel ]

Now if I try  car_wheel_path(@car, @car.wheel) I get
undefined method `has_key?' for #<Wheel:0x48e3e20>

car_wheel_path(@car) works but the url is wrong (at least I think
so): /cars/1/wheel
and l get "Couldn't find Wheel without an ID"

rake routes outputs:
------ POST   /cars/:car_id/wheel
{:controller=>"wheels", :action=>"create"}
------ POST   /cars/:car_id/wheel.:format
{:controller=>"wheels", :action=>"create"}
new_car_wheel GET    /cars/:car_id/wheel/new
{:controller=>"wheels", :action=>"new"}
formatted_new_car_wheel GET    /cars/:car_id/wheel/new.
:format  {:controller=>"wheels", :action=>"new"}
edit_car_wheel GET    /cars/:car_id/wheel/edit
{:controller=>"wheels", :action=>"edit"}
formatted_edit_car_wheel GET    /cars/:car_id/wheel/edit.:format
{:controller=>"wheels", :action=>"edit"}
car_wheel GET    /cars/:car_id/wheel
{:controller=>"wheels", :action=>"show"}
formatted_car_wheel GET    /cars/:car_id/wheel.:format
{:controller=>"wheels", :action=>"show"}
------ PUT    /cars/:car_id/wheel
{:controller=>"wheels", :action=>"update"}
------ PUT    /cars/:car_id/wheel.:format
{:controller=>"wheels", :action=>"update"}
------ DELETE /cars/:car_id/wheel
{:controller=>"wheels", :action=>"destroy"}
------ DELETE /cars/:car_id/wheel.:format
{:controller=>"wheels", :action=>"destroy"}

Any ideas to solve this? How do I get the wheel_id for the wheels
controller? I'm really stuck :-(

thanks
bye Wolfgang

Hi

I've got exactly the same problem.

Did you find any solution until now?

Thanks,
Thomas

Thomas,

Looking at Wolfgang's example, I'm wondering if there's an inflection
issue going on.  Does Rails expect a pluralized controller name for
singleton resources, or plural?

James

On Dec 10, 2:15 pm, thom <thomas.wei...@gmail.com> wrote:

Hi James

In my case I have the following models

#  id                             :integer(11)   not null, primary key
class User < ActiveRecord::Base
  has_one :profile
end

#  id             :integer(11)   not null, primary key
#  user_id        :integer(11)
class Profile < ActiveRecord::Base
  belongs_to :user
end

config/routes.rb looks like this

map.resources :users do |users|
  users.resource :profile, :controller => 'profile'
end

It does not really matter whether I'm using ProfileController or
ProfilesController, I get the same error as soon as I'm using

<% form_for [@user, @profile] do |f| %>

in app/views/profile/edit.html.erb.

But if I use

<% form_for :profile, @profile, :url => user_profile_path(@user),
            :html => { :method => :put } do |f| %>

it works without any problems.

Thomas

Are you using rails 2.0.1? I have the following in some test code I wrote
and it works fine for me.

map.resources :posts, :has_many => :comments

class Comment < ActiveRecord::Base
  belongs_to :post
end

class Post < ActiveRecord::Base
  has_many :comments
end

<% form_for([@post, @comment]) do |f| %>

<% end %>

On Dec 11, 2007 9:08 AM, thom <thomas.wei...@gmail.com> wrote:

--
E. James O'Kelly
Ruby on Rails Evangelist
Software Engineer
760 777-6418

Without seeing the code it is going to be difficult to see where the problem
truly lies. If you would like one of you can send me your codebase and I can
get it to work and then post the fix here. The easiest way it to zip it and
upload it to mediafire.com and send me the download link to
james{at}railsjitsu(dot)com.

I have some time open today I could work on this for you.

On Dec 11, 2007 9:16 AM, E. James OKelly <e.james.oke...@gmail.com> wrote:

--
E. James O'Kelly
Ruby on Rails Evangelist
Software Engineer
760 777-6418

Hi James

Thanks for your answer. Yes, I'm using Rails 2.0.1.

I managed to fix the problem. Instead of using

<% form_for([@user, @profile]) do |f| %>

I had to use

<% form_for([:user, @profile]) do |f| %>

which of course is mentioned in the API documentation
(http://api.rubyonrails.com/classes/ActionView/Helpers/FormHelper.html...)
:).

Thomas

The helper form_for does not work for nested singleton resource in
Rails 2.0

Given below nested singleton resource profile,
map.resources :users do |user|
    user.resource  :profile
end

<% form_for([@user, @profile]) do |f| %>
actually expects to get the url from helper "user_profileS_url ",
instead of "user_profile_url". The latter url helper is the one
generated by routes.rb.
<% form_for([:user, @profile]) do |f| %> generates url like /user/
profile, which is for named route, not for singleton resource.

Any idea?

Steven

It's probably far too late to be much assistance to any of these
posters, but I put a tut at

http://wiki.rubyonrails.org/rails/pages/HowToDoHasOneNestingInRails2.0

about a setup that works for me.

Ron

Hello,

I have the same problem as the originator of this thread, and still
cannot get it to work.

I have a simple example:

In my routes.rb I have the following:

map.resources :cars :has_one => [:motor]

I'm trying to get the url for editing the motor object, which should
be http://mysite/cars/1/motor/edit

However, when I call either car_motor_path(@car, @car.motor) or
edit_car_motor_path(@car, @car.motor) I get:

undefined method `has_key?' for #<Motor:0x44a75f0>

Any ideas?

Thanks, Leo.

Not sure if you have a typo or not, but the url should be:

http://mysite/cars/1/motor/1/edit.

Edit is a member method and you must supply an id for it to work.

Also, I noticed some inconsistencies in the path rendering in late
1.2.x and pre 2.0 releases.  In 1.99.x you may need to specify:

edit_car_motor_path(:car_id=>@car.id, :id=>@car.motor.id)

It's probably worth upgrading to 2.x rather than hack around this.

On Mar 7, 3:53 am, padboo <gle...@gmail.com> wrote:

On Mar 8, 2:21 pm, AndyV <a...@cornell.edu> wrote:

I don't know about that; if you look at the tut I posted, "<%=link_to
'Show', trip_expenditure_path(@trip)>" gives 'trips/:trip_id/
expenditure' and it works just fine.

I think padboo could call "car_motor_path(@car)"; the :motor_id is
implicit since there's only one.

Ron