Rails 3 nested forms won't work

My accommodation model:

class Accommodation < Active开发者_如何转开发Record::Base
...
  has_one :address
...
  accepts_nested_attributes_for :address
...

end

My address model:

class Address < ActiveRecord::Base
  belongs_to :accommodation
end

My accommodation _form.html.haml partial

=form_for [:panel,@accommodation], :html => {:class=>'accommodation'} do |f|
    %fieldset
    %legend
      Adres
    =f.fields_for :address do |address_f|
      =address_f.label :street, "Ulica"
      =address_f.text_field :street

    %div

Problem is the field for street will not show. It shows when I change :address to @accommodation.build_address but then the form is not accepted.

How to do it properly to work?

Found a solution:
fields_for needs to look like this:
=f.fields_for :address_attributes, @accommodation.address do |address_f|
It works perfectly now.

try it

=f.fields_for :address, @accomodation.address.new do |address_f|