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

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?

ruby-on-railsruby-on-rails-3rakeassets


Solution 1:[1]

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

Solution 2:[2]

I ran into the same problem, but it was resolved below.

Ruby -v: 3.0.2 Rails -v: 6.1.3

config/application.rb

require "sprockets/railtie”

terminal

$ mkdir -p app/assets/config && echo '{}' > app/assets/config/manifest.js

Solution 3:[3]

My app was api_only so Rails skipped creating assets when generating a new resource.

I removed the references to config.assets from development.rb and production.rb and it worked.

So you can remove the references to assets if your App doesn't need it.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 andrewpthorp
Solution 2 jojo
Solution 3

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