Help geting started

rubyonrails-talk
1

Hi

I am reading O'Reilly Rails Cookbook, but I can not get the examples working. Here is what I have done so far:

rails mytest --database=mysql

ruby script/generate migration build_db --BuildDb class-- class BuildDb < ActiveRecord::Migration   def self.up     create_table :schedules, :force => true do |t|       t.column :scheduleTime, :datetime       t.column :repeatEveryYear, :boolean       t.column :message, :string

      t.timestamps     end   end

  def self.down     drop_table :schedules   end end --BuildDb class--

rake db:migrate

ruby script/generate model schedules (generates a new empty migration, I deleted it)

ruby script/generate controller schedules

Edited my controller, and added: scaffold :schedules

But when I try to test my application, the mongrel log gives me this:

Wed Aug 11 12:06:10 +0200 2010: Error calling Dispatcher.dispatch #<NoMethodError: You have a nil object when you didn't expect it! You might have expected an instance of Array. The error occurred while evaluating nil.split> /Users/sneigaard/.gem/ruby/1.8/gems/actionpack-2.3.8/lib/ action_controller/cgi_process.rb:52:in `dispatch_cgi' /Users/sneigaard/.gem/ruby/1.8/gems/actionpack-2.3.8/lib/ action_controller/dispatcher.rb:101:in `dispatch_cgi' /Users/sneigaard/.gem/ruby/1.8/gems/actionpack-2.3.8/lib/ action_controller/dispatcher.rb:27:in `dispatch' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb: 76:in `process' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb: 74:in `synchronize' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb: 74:in `process' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:159:in `process_client' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:158:in `each' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:158:in `process_client' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:285:in `run' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:285:in `initialize' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:285:in `new' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:285:in `run' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:268:in `initialize' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:268:in `new' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:268:in `run' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/ configurator.rb:282:in `run' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/ configurator.rb:281:in `each' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/ configurator.rb:281:in `run' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:128:in `run' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/ command.rb:212:in `run' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:281 /usr/bin/mongrel_rails:19:in `load' /usr/bin/mongrel_rails:19

Hm well should this not work?

Thank you Søren

2

That's not really a beginners tutorial book - it's more for reference on how to deal with specific problems. You may be better off with a book like "Agile Web Development With Rails", which does take you through from first principles.

Also, I'm not sure how up-to-date the Cookbook is (mine's for Rails 1.2 I think!), and it looks like you're running 2.3.8, so that may be part of the problems you're having.

3

neigaard wrote:

Hi

I am reading O'Reilly Rails Cookbook, but I can not get the examples working. Here is what I have done so far:

rails mytest --database=mysql

Maybe you should start Rails learning by following 'http://guides.rubyonrails.org/’ site.

Thanks, Anubhaw

4

Hey,

I also just started learning rails. First I've read "The well grounded Rubyist" to learn the language itself and now I'm reading "Agile Web Development with Rails".

Cheers,

Jan

5

Well, I am now reading Getting Started with Rails — Ruby on Rails Guides (also tried Agile Web Development with Rails), but I do not get very far. I follow the guide to chapter 4.1, but when I point my browser to http://localhost:3000/home/index I get a blank page and the following in mongrel.log:

Fri Aug 13 12:20:22 +0200 2010: Error calling Dispatcher.dispatch #<NoMethodError: You have a nil object when you didn't expect it! You might have expected an instance of Array. The error occurred while evaluating nil.split> /Users/sneigaard/.gem/ruby/1.8/gems/actionpack-2.3.8/lib/ action_controller/cgi_process.rb:52:in `dispatch_cgi' /Users/sneigaard/.gem/ruby/1.8/gems/actionpack-2.3.8/lib/ action_controller/dispatcher.rb:101:in `dispatch_cgi' /Users/sneigaard/.gem/ruby/1.8/gems/actionpack-2.3.8/lib/ action_controller/dispatcher.rb:27:in `dispatch' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb: 76:in `process' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb: 74:in `synchronize' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb: 74:in `process' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:159:in `process_client' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:158:in `each' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:158:in `process_client' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:285:in `run' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:285:in `initialize' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:285:in `new' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:285:in `run' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:268:in `initialize' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:268:in `new' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:268:in `run' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/ configurator.rb:282:in `run' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/ configurator.rb:281:in `each' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/ configurator.rb:281:in `run' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:128:in `run' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/ command.rb:212:in `run' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:281 /usr/bin/mongrel_rails:19:in `load' /usr/bin/mongrel_rails:19

Any ideas? Is my rails setup broken? I am runing on OS X 10.6.4, is it is broken, then how can I uninstall it all and reinstall?

Thank you Søren

6

you can also take a look at this http://railstutorial.org/book

as far as you environment being broken that’s hard to tell without more information

7

Ok I tested some more, and I found out that it works with the webrick (ruby script/server webrick) server, so my mongrel must be broken some how? I did a:

sudo gem uninstall fastthread sudo gem uninstall mongrel sudo gem install mongrel

But still I get the same error with mongrel. Well I can work with webrick, but I sure would like to know what is wrong with my mongrel.

Thank you Søren