Question

I’m trying to create link in title of post that opens new page with this post.
I tried <%= link_to post.title, posts_path(path) %>, but getting error

undefined local variable or method `posts_path' for #<#<Class:0x007fbf134f2b88>:0x007fbf13c17d78>

What am i doing wrong?

rake:routes:

 posts_index GET    /posts/index(.:format)         posts#index
               posts_new GET    /posts/new(.:format)           posts#new
            posts_create POST   /posts/create(.:format)        posts#create
                         GET    /posts/:id(.:format)           posts#show
                    root        /                              home#index
                    root        /                              home#index
        new_user_session GET    /users/sign_in(.:format)       devise/sessions#new
            user_session POST   /users/sign_in(.:format)       devise/sessions#create
    destroy_user_session DELETE /users/sign_out(.:format)      devise/sessions#destroy
           user_password POST   /users/password(.:format)      devise/passwords#create
       new_user_password GET    /users/password/new(.:format)  devise/passwords#new
      edit_user_password GET    /users/password/edit(.:format) devise/passwords#edit
                         PUT    /users/password(.:format)      devise/passwords#update
cancel_user_registration GET    /users/cancel(.:format)        devise/registrations#cancel
       user_registration POST   /users(.:format)               devise/registrations#create
   new_user_registration GET    /users/sign_up(.:format)       devise/registrations#new
  edit_user_registration GET    /users/edit(.:format)          devise/registrations#edit
                         PUT    /users(.:format)               devise/registrations#update
                         DELETE /users(.:format)               devise/registrations#destroy
                   users GET    /users(.:format)               users#index
                    user GET    /users/:id(.:format)           users#show

Answer 1

If you just want to go to the show action, it’s enough to write

<%= link_to post.title, post %>

Which is the same as

<%= link_to post.title, post_path(post) %>

Take a look a the doc: http://apidock.com/rails/ActionView/Helpers/UrlHelper/link_to