Rails - Feb 2011 - fields_for and table which has underscore

Hello.
I''m trying to do like this:

# user.rb
class User < ActiveRecord::Base
  has_one :user_profile
  accepts_nested_attributes_for :user_profile
end

# user_profile.rb
class UserProfile < ActiveRecord::Base
  belongs_to :user
end

#app/views/users/_form.html.erb
<%= form_for @user do |user_form| %>
  <%= user_form.fields_for :user_profile do | user_profile_form | %>
    <%= user_profile_form.text_field :favorite_food %>
  <% end %>
<% end %>

but it doesn''t render user_profile_form at all.
but it does render if user_profile is profile or user_profile ( no
underscore) .
Is this the way of Rails or a bug??

Can anyone teach me the right way to do it?
Thanks

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> #app/views/users/_form.html.erb
> <%= form_for @user do |user_form| %>
>  <%= user_form.fields_for :user_profile do | user_profile_form | %>
>    <%= user_profile_form.text_field :favorite_food %>
>  <% end %>
> <% end %>
> 
> but it doesn''t render user_profile_form at all.
> but it does render if user_profile is profile or user_profile ( no
> underscore) .
> Is this the way of Rails or a bug??
> 
It shouldn''t make any difference. Does the user actually have a
profile/user_profile? (if not the subform wouldn''t be rendered)

Fred
> Can anyone teach me the right way to do it?
> Thanks
> 
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