Ruby on Rails

CoderMan · 06-28-2010, 01:39 AM

I'm going through the Beta version of "Agile Web Development with Rails - 4th Edition". But I'm having difficulty with initial configuration on my Gentoo box. I started like so, basically following the book:

Code:

$ rails testrails
$ cd testrails
$ script/generate controller Say hello goodbye

This created files including app/controllers/say_controller.rb, app/views/say/hello.html.erb, and app/views/say/hello.html.erb
like the book said it would. So then I ran the server in a separate terminal:

Code:

$ script/server

Then I opened up a browser, but if I try to visit "http://localhost:3000/say/hello" all I get in the browser window is the message: "We're sorry, but something went wrong. We've been notified about this issue and we'll take a look at it shortly."

If I visit "http://localhost:3000/" then I get a default index page, which says I need to edit "config/routes.rb" But none of the comments in routes.rb make any sense to me, so I am not sure what I need to put in it. The book hasn't mentioned anything about routes yet.

rweaver · 06-28-2010, 02:48 PM

My first question after reading this post is... do you know ruby? If not... rails is rough.

I would also take a look at the gentoo wiki on this one and the RoR wiki -- http://www.gentoo-wiki.info/HOWTO_RoR

CoderMan · 06-28-2010, 04:38 PM

Quote:

Originally Posted by rweaver

My first question after reading this post is... do you know ruby? If not... rails is rough.

I would also take a look at the gentoo wiki on this one and the RoR wiki -- http://www.gentoo-wiki.info/HOWTO_RoR

Yes, I've known Ruby for about a month now. Sorry, should have been more specific. Here's the routes.rb file:

Code:

ActionController::Routing::Routes.draw do |map|
  # The priority is based upon order of creation: first created -> highest priority.

  # Sample of regular route:
  #   map.connect 'products/:id', :controller => 'catalog', :action => 'view'
  # Keep in mind you can assign values other than :controller and :action

  # Sample of named route:
  #   map.purchase 'products/:id/purchase', :controller => 'catalog', :action => 'purchase'
  # This route can be invoked with purchase_url(:id => product.id)

  # Sample resource route (maps HTTP verbs to controller actions automatically):
  #   map.resources :products

  # Sample resource route with options:
  #   map.resources :products, :member => { :short => :get, :toggle => :post }, :collection => { :sold => :get }

  # Sample resource route with sub-resources:
  #   map.resources :products, :has_many => [ :comments, :sales ], :has_one => :seller
  
  # Sample resource route with more complex sub-resources
  #   map.resources :products do |products|
  #     products.resources :comments
  #     products.resources :sales, :collection => { :recent => :get }
  #   end

  # Sample resource route within a namespace:
  #   map.namespace :admin do |admin|
  #     # Directs /admin/products/* to Admin::ProductsController (app/controllers/admin/products_controller.rb)
  #     admin.resources :products
  #   end

  # You can have the root of your site routed with map.root -- just remember to delete public/index.html.
  # map.root :controller => "welcome"

  # See how all your routes lay out with "rake routes"

  # Install the default routes as the lowest priority.
  # Note: These default routes make all actions in every controller accessible via GET requests. You should
  # consider removing or commenting them out if you're using named routes and resources.
  map.connect ':controller/:action/:id'
  map.connect ':controller/:action/:id.:format'
end

I don't have any trouble coding the examples given to me in the book, but when I start the rails server and try to view them in the browser, I only get that error message I mentioned. The default rails server page (at the root URL) says I need to adjust the routes.rb config file to my project, but I am not sure what it should be adjusted to. The only concepts I have learned from the book so far (and only a vague concept at that) is the "controller" and the "action". I don't know what the "id" or the "format" or the "product" or the "routes" and "resources" refer to. I suppose I'll get to that in the book eventually, but for now I just need to know enough to get the example app to display.

CoderMan · 06-28-2010, 10:18 PM

Figured it out: Apparently rails needs to have some database software installed, and I overlooked this. I installed sqlite3-ruby from the Gentoo tree, and now everything seems to be working fine.