Rails 3.1/Mongoid - How to find model by name rather than id in routes

Edit: i am using Mongoid/MongoDB for my database, meaning I don't get the normal Active Record tools I think.

I have a simple Rails 3.1 app with a model Page. I would like to match '/:customURL' to the Page#show action for the Page with the relevant :customURL. How should I change the controller and routes? Keep in mind that there are a few routes from '/SOMETHING' that I 开发者_如何学运维want to keep. For instance '/pages' should still go to my Page#index action not try to find a page with customURL of 'pages'.

current controller:

def show
@page = Page.find(params[:id])
@title = @page.title

  respond_to do |format|
    format.html # show.html.erb
    format.json { render json: @page }
  end
end

routes:

resources :pages do
  resources :feeds
end

get "pages/index"
get "pages/show"
get "pages/new"

root :to => "pages#index"

Thanks a million.

Assuming that your Page has a customURL attribute from its database table. In your controller:

def show
  @page = Page.first(:conditions => {:customURL => params[:customURL]})
  @title = @page.title

  respond_to do |format|
    format.html # show.html.erb
    format.json { render json: @page }
  end
end

In your routes

resources :pages, :except => :show do
  resources :feeds
end

# Anything you want to match before the custom URLs needs to go above the next route definition
get "/:customURL" => "pages#show"    

root :to => "pages#index"