form_for nested resource (singular) not using correct path helper

Question

I'm probably doing something stupid, but...

app/model/user.rb:

class User < ActiveRecord::Base
has_one :totem

config/routes.rb:

resources :users do
    resource :totem
end

app/controllers/totems_controller.rb:

class TotemsController < ApplicationController

    before_filter do
        @user = User.find(params[:user_id])
    end

    def new
        @totem = @user.build_totem
    end

end

app/views/totems/new.html.erb:

<%= form_for [@user, @totem] do |f| %>
<% end %>

Then, when I navigate to /users/123/totem/new, I get the error:

ActionView::Template::Error (undefined method `user_totems_path' for #<#<Class:0x007f9d3c843b00>:0x007f9d3bb6dd68>):

But because I'm using resource :totem instead of resources :totems in routes.rb, the path helper it should be using is user_totem_path. Why isn't it trying to use the correct path helper?

possible duplicate of [Ruby on rails: singular resource and form\_for](http://stackoverflow.com/questions/3736759/ruby-on-rails-singular-resource-and-form-for) — aidan, May 31 '13 at 05:22

score 6 · Accepted Answer · edited May 23 '17 at 12:07

6

Found my answer in another question: Ruby on rails: singular resource and form_for

app/models/totem.rb:

class Totem < ActiveRecord::Base
    model_name.instance_variable_set :@route_key, 'totem'
    belongs_to :user
end

(not sure why this Q&A didn't appear in my earlier searches...)

edited May 23 '17 at 12:07

Community

1
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answered May 31 '13 at 05:21

aidan

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score 1 · Answer 2 · answered May 31 '13 at 05:53

1

Or you could just use

form_for @totem, :url => user_totem_path(@user) do |f|

answered May 31 '13 at 05:53

score 0 · Answer 3 · edited May 31 '13 at 04:34

0

instead of

resource :totem

it should be

resources :totem

edited May 31 '13 at 04:34

logesh

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answered May 31 '13 at 04:33

sp1rs

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2

I was using `resources` before, but I'd prefer to use `resource` because each user has only one totem, and `resource` generates slightly neater URLs. – aidan May 31 '13 at 04:37

Henry · Answer 4 · 2013-05-31T06:27:17.713

I couldn't figure out why too. I used this way (providing a url to form_for) to bypass the problem

<%= form_for [@user, @totem], :as => :totem, :url => user_totem_path do |f| %>

Also, some research from google find out that there's a bug report in earlier rails. But i am not sure whether it's been fixed or not in the latest rails. Here is the link if you would like to do more research

https://rails.lighthouseapp.com/projects/8994/tickets/267

form_for nested resource (singular) not using correct path helper

4 Answers4