I am sorry for asking what may be a remedial question, but in learning rails i was trying to follow along note for note in this tutorial:
http://guides.rubyonrails.
i'm new to the ruby world i have started learning it this afternoon :)
i had the same error as yours and i solved it by changing the way routes have been written to the suggested style within the routes.rb file.
instead of what have been written on that tutorials copy and past this into your routes.rb
Blog::Application.routes.draw do
get "welcome/index"
resources :posts
root 'welcome#index'
get '/posts/:id(.:format)' => 'posts#show'
get '/posts(.:format)' => 'posts#index'
end
save and check your posts url as suggested on that tutorials
http://localhost:3000/posts
it should work for you.