如果我的用户已登录，如何包含其他文件？

Question

I'm using Rails 4.2.5. I have this line in my “app/views/layouts/application.html.erb” file …

<%= yield %>

If the user is logged in, I would like to display the content from the page “./app/views/user_objects/index.html.erb” but if they are not, I would like to display content from the page “app/views/pages/_welcome.html.erb”. I don't know how to set this up. In my config/routes.rb file I have

constraints lambda { |req| !req.session[:user_id].blank? } do
  root :to => 'user_objects#index', as: "dashboard"
end

root to: 'pages#index'

but that is displaying the “./app/views/user_objects/index.html.erb” file at all times, even if the user is not logged in. What do I need to add (or remove) to allow me to display the normal welcome page content if the user is not logged in?

Answer 1

I'd do this a bit different. In my config/routes.rb I'd have just the usual

root 'pages#index'

and then I'd change my index method at app/controllers/pages_controller.rb to

def index
  if logged_user? 
    render 'user_objects/index'
  end
end

and then I'd put all this logic to say if the user is logged in a logged_user? method like

def logged_user?
  !session[:user_id].blank?
end

There are other ways to to this, of course. But always keep the KISS Principle in mind.

If you really want to understand all the rendering process, it would be better to give some attention to http://guides.rubyonrails.org/layouts_and_rendering.html