Simple relation question

Hello group,

I'm new to Rails and i'm trying to create a 'nested' form for user to a company. I would like the client to be able to create a company in the users sign up form. I get the part were you can choose a company from a collection, but i want to allow the user to create a new company through a text field in the sign up user form.

This is what i have:

class User < ActiveRecord::Base   belongs_to :company   has_one :company

attr_accessible :email, :password, :password_confirmation, :remember_me, :admin, :company_id, :firstname, :lastname

  accepts_nested_attributes_for :company end

class Company < ActiveRecord::Base   has_many :users   accepts_nested_attributes_for :users

  attr_accessible :name

    #validates_presence_of :name     #validates_uniqueness_of :name end

and in the form:

<%= simple_form_for(resource, :as => resource_name, :url => registration_path(resource_name)) do |f| %>   <%= f.error_notification %>

  <div class="inputs">     <%= f.fields_for :company do |cf| %>       <%= cf.input :name, :required => true, :autofocus => true %>     <% end %>     <%= f.input :email, :required => true, :autofocus => true %>     <%= f.input :password, :required => true %>     <%= f.input :password_confirmation, :required => true %>   </div>

  <div class="form-actions">     <%= f.button :submit, :class => 'btn-primary', :value => 'Sign up' %>   </div> <% end %>

The above code gives a company name text field in the form but on submit rails trows an error: Can't mass-assign protected attributes: company. I probably have to add a route to? until now i only have resources :companies and resources :users.

I did my best to google for a solution/ example.. found some nested form examples but its not clear to me.

Any help on this would be appreciated.

Thanks in advance!