undefined method `assets' for #<Rails::Application::Configuration>

Question

Hi I was upgrading a Rails 2 app to Rails 3. When I want to run something like: rails c, rake -T, etc. It throws this:

$ rails c
/usr/lib/ruby/gems/1.8/gems/railties-3.0.9/lib/rails/railtie/configuration.rb:77:in `method_missing': undefined method `assets' for #<Rails::Application::Configuration:0xb6569120> (NoMethodError)
    from /home/neoriddle/proyectos/interkids/config/application.rb:49
    from /usr/lib/ruby/gems/1.8/gems/railties-3.0.9/lib/rails/commands.rb:21:in `require'
    from /usr/lib/ruby/gems/1.8/gems/railties-3.0.9/lib/rails/commands.rb:21
    from script/rails:6:in `require'
    from script/rails:6

this was with rails c and next log is running rake -T:

$ rake -T --trace
rake aborted!
undefined method `assets' for #<Rails::Application::Configuration:0xb658aa64>
/usr/lib/ruby/gems/1.8/gems/railties-3.0.9/lib/rails/railtie/configuration.rb:77:in `method_missing'
/home/neoriddle/proyectos/interkids/config/application.rb:49
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
/home/neoriddle/proyectos/interkids/Rakefile:5
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/rake_module.rb:25:in `load'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/rake_module.rb:25:in `load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:501:in `raw_load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:82:in `load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:81:in `load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:65:in `run'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/bin/rake:33
/usr/bin/rake:19:in `load'
/usr/bin/rake:19

Do you have some ideas to solve this?

Answer 1

Asset pipeline wasn't included until rails 3.1. Upgrade your rails gem (and app) to rails 3.1+.