ruby-on-rails – 用于嵌套路由的rails简单形式

/users/1/projects/2/objects

表格是：

<%= simple_form_for @object,:url => user_project_objects_path(@user,@project),:html => { :class => 'form-horizontal' } do |f| %>

在routes.rb中：

resources :users do
  resources :projects do
    resources :objects do
      collection { post :import }
    end
  end
end

我的问题是：对象控制器的新功能和创建动作是什么？

到目前为止 – 我收到路由错误 – 我有：

def create
  @user = current_user
  @project = Project.find_by_user_id(@user)
  @object = @project.objects.build(params[:object])
  if @object.save
    flash[:notice] = "Object was successfully created"
    redirect_to user_project_objects_path
  else
    render 'new'
  end
end

def new
  @user = current_user
  @project = Project.find_by_user_id(@user)
  @object = @project.objects.build
end

任何建议都非常感谢.

回应Greg W：

No route matches {:action=>"edit",:controller=>"objects",:user_id=>#<Object id: 8,source_lang_id: 1,source_content: "Kaffehaus",target_lang_id: 2,target_content: "cafe",domain_id: 2,owner_id: nil,created_at: "2013-01-04 06:36:55",updated_at: "2013-01-04 06:36:55",project_id: 2>}

owner_id(用户,即current_user)未更新 – 这可能是问题(？)