Has_one and Strong Attributes

[Andrey Cherkashin]

Hey, I'm using Rails4.rc2 and here is my problem:

I have model called Manager, it has_one ManagerContact and ManagerBank. I'm trying to build a form in which Manager can update his ManagerContact and ManagerBank.

Controller in charge of profile:

...
  def profile
    @manager  = current_manager
    @contact  = @manager.manager_contact.nil? ? @manager.build_manager_contact : @manager.manager_contact
    @bank     = @manager.manager_bank.nil? ? @manager.build_manager_bank : @manager.manager_bank
  end

  def update_profile
    current_manager.update_attributes(manager_params)
    ...
    redirect_to managers_profile_path
  end
  private
    def manager_params
      params.require(:manager).permit(:biz_type,
                                      :manager_contact => [:first_name, :last_name, :phone_number, :dob],
                                      :manager_bank => [:account_holder, :routing, :account]
      )
    end
...

In the view(I omitted some inputs to save space) :

  = form_for @manager, url: managers_edit_path, method: :post do |f|
    .divider
    %fieldset
      %legend Personal Information
      = f.fields_for @contact do |ff|
        .inputs
          = ff.label :first_name
          = ff.text_field :first_name

    .divider
    %fieldset
      %legend Bank Information
      = f.fields_for @bank do |ff|
        .inputs
          = ff.label :account_holder
          = ff.text_field :account_holder

    .divider
    %fieldset
      = f.submit 'Save Changes', class: 'button active'