Question

I created a scaffold class, now i want to add another method in the controller to it and provide a button link to it to call the method.

How do i do this.

Say the method is called ‘new_method’, what do i put in the erb and routes files in order to call this get method?

Answer 1

Suppose your scaffold class is called Post, then in your routes you should have:

resources :posts

You then want to add a new_method, you have to choose whether this will work on the collection or on a single object.

On a collection

In your routes you write

resources :posts do
  collection do
    get :new_method
  end
end

And in your erb you would write

<%= link_to 'Do new-method', new_method_posts_path %>

Note, if you want to you could also use button_to instead of link_to if you prefer to have a button instead.

On a single object (member)

In your routes you write

resources :posts do
  member do
    get :new_method
  end
end

And in your erb you would write

<%= link_to 'Do new-method', new_method_post_path(@post) %>

Hope this helps.