Ruby on Rails: switching from rails 2.3.8 to 3.0.3

Question

In my env I require 3.0.3

but when I script/server

I get this: can't activate rails (= 2.3.8, runtime) for [], already activated rails-3.0.3

I don't want it to activate 2.3.8.. =\

Answer 1

Check environment.rb to make sure that you're not specifying rails 2.3.8 explicitly. If you are then you need to make sure you've upgraded to bundler properly.

My suggestion is to generate an empty rails 3 project and look at how the generated files and make sure your app looks similar.

Answer 2

Rails 3.x doesn't use script/server anymore - you should run your server with rails server or rails s. You can delete all the files from script, except for script\rails.

Plus, you no longer specify your Rails version in environment.rb (if that's what you mean by "env"). All gems and their versions are specified in your Gemfile.

Did you follow a guide like Upgrading to Rails 3? It's not enough to just change the Rails version in evironment.rb.

Answer 3

The command to run the server in Rails 3 is rails server. What happens if you run that?

Answer 4

Rails 3 uses

rails server

command instead of

ruby script/server