Create a user profile upon registration add profile form fields to devise registrations#new form

I have a rails 3.1 app with devise:

• User has_one profile
• Profile belongs_to user
• Overruled the devise registration_controller
• Custom registration views all working fine, registration works fine

Now I could like to add this:

• On the registration page I want to add fields from the profile, like first name, lastname
• There is no user yet, that is going to be created when submitting the form
• I need the profile to be created with this first name,last

How would I do this? I tried several ideas, also from stack overflow but cannot seem to get it working. I tried nested attributes wich is not working the way to do this would to create a profile record in the db at the moment the user registers wich inserts the first name and last name

My registrations#new view:

= simple_form_for(resource, :as => resource_name, :url => registration_path(resource_name)) do |f|

    = devise_error_messages!

    = f.input :username,                  :label => 'Username'
    = f.input :email,                     :label => 'Email'
    = f.input :password,                  :label => 'Password'
    = f.input :passwo开发者_运维问答rd_confirmation,     :label => 'Password confirm'

    // start fields for profile
    = f.fields_for :profile do |f|
      = f.label :bod_day
      = f.text_field :bod_day
    // end fields for profile


    = f.button :submit, t(:submit, :scope => :register)

In my user model i have this:

  accepts_nested_attributes_for :profile

I think the problem is that no profile exists on that user when the form is rendered, a simple way to get round this might be to build it in memory before rendering the fields like so:

= simple_form_for(resource, :as => resource_name, :url => registration_path(resource_name)) do |f|

    = devise_error_messages!

    = f.input :username,                  :label => 'Username'
    = f.input :email,                     :label => 'Email'
    = f.input :password,                  :label => 'Password'
    = f.input :password_confirmation,     :label => 'Password confirm'

    // make a new profile in memory
    = resource.build_profile

    // start fields for profile
    = f.fields_for :profile do |f|
      = f.label :bod_day
      = f.text_field :bod_day
    // end fields for profile


    = f.button :submit, t(:submit, :scope => :register)

In addition to Nesbitt's solution, add this to your model

attr_accessible ..., :profile_attributes