Nested objects has_one relation

I'm new on rails , im trying to do a crud with 2 objects and has_one relation, i have a Project and Album , and just a :name property for each one. But when i create a project, both names are blank. here's my code:

project.rb , album.rb

class Project < ActiveRecord::Base
 has_one :album
 accepts_nested_attributes_for :album, allow_destroy: true
end

class Album < ActiveRecord::Base
 belongs_to :project
end

ProjectsController.rb

def new
 @project = Project.new
 @album = @project.build_album
end

def create
 @project = Project.new
 @album = @project.create_album(params[:album])

  respond_to do |format|
    if @project.save
      format.html { redirect_to @project, notice: 'Project was successfully    created.' }
      format.json { render :show, status: :created, location: @project }
    else
      format.html { render :new }
      format.json { render json: @project.errors, status: :unprocessable_entity }
    end
  end
end

def project_params
  params.require(:project).permit(:name, album_attributes: [:name])
end

_form.html.erb (project)

<%= form_for(@project) do |f| %>
  <% if @project.errors.any? %>
    <div id="error_explanation">
  <h2><%= pluralize(@project.errors.count, "error") %> prohibited this project from being saved:</h2>
  <ul>
   <% @project.errors.full_messages.each do |message| %>
    <li><%= message %></li>
   <% end %>
  </ul>
    </div>
   <% end %>

   <div class="field">
    <%= f.label :name, 'Project name: ' %><br>
     <%= f.text_field :name %>
   </div>

 <%= f.fields_for :album do |a| %>
   <div class="field">
     <%= a.label :name, 'Album name' %><br />
     <%= a.text_field :name %>
   </div>
 <% end %>

<div class="actions">
<%= f.submit %>
</div>

routes.rb

  resources :projects do
   resources :albums
  end

When i create the project/new don't work, but if i create album/new the album get a name.

Thanks!