如何路由到新的rails控制器操作

Question

I'm new to Rails and have the encountered this problem.

I have a books_controller where I have defined a new action called download:

def download
  @book = Book.find(params[:id])

  return send_file @book.get_filepath, :type => 'application/pdf', :filename => @book.get_filename
end

My routes.rb is like:

resources :books
match '/books(/download(/:id))', :controller => "books", :action => "download"

I would like to create a URL like /books/download/10 to call the download action.

I'm not sure how I can create that link. I have tried reading the Rails Guide on routing, but am very confused by it.

I have tried

<td><%= link_to books_download_path(book) %></td>

and it clearly doesn't work.

undefined method `books_download_path' for #<#<Class:0x682ac40>:0x482cad8>

I'd appreciate any help on this.

Thanks

PS Maybe /books/10/download makes more sense than /books/download/10

index.html.erb

<table>
<% @recent_books.each do |book| %>
    <tr>
        <!-- <td><%= image_tag(book.get_thumbnail) %></td> -->
        <td><%= truncate(book.get_title, :length => 30) %></td>
        <td><%= book.get_author %></td>
        <td><%= book.get_summary %></td>
        <td><%= truncate(book.get_filename, :length => 30) %></td>
        <!-- <td><%= link_to 'Download', book %></td> -->
        <td><%= link_to "Download", download_book_path(book) %></td>
    </tr>
<% end %>
<table>

routes.rb

Caliberator::Application.routes.draw do resources :authors

resources :books do
  get :download, :on => :member, :to => 'books#download'
end

end

Answer 1

For Rails 3, try this

resources :books do
  get :download, :on => :member, :to => 'books#download'
end

Now, in your views, you can use.

<%= link_to 'Download', download_book_path(book) %>

This will generate books/10/download type links.

Answer 2

Try following

match '/books(/download(/:id))', :controller => "books", :action => "download", :as => "books_download"

Ref:- naming_routes

Answer 3

你必须这样做：

<%= link_to "Download", download_books_path + "/#{book.id}" %>

Answer 4

For rails 3, you should write:

resources :books do
  member do
    get 'download'
  end
end