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Asked: 2026-05-22T20:30:53+00:00

Trying to generate Rails API documentation, but running into errors: $ rake doc:rails rake

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Trying to generate Rails API documentation, but running into errors:

$ rake doc:rails
rake aborted!
undefined method `task' for #<DummyApp::Application:0x00000100dd14d0>

(See full trace by running task with --trace)
MacBook-Pro-van-Joris-Ooms:dummy_app joris$ rake doc:rails --trace
rake aborted!
undefined method `task' for #<DummyApp::Application:0x000001023b1ea8>
/Users/joris/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.0.7/lib/rails/application.rb:215:in `initialize_tasks'
/Users/joris/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.0.7/lib/rails/application.rb:139:in `load_tasks'
/Users/joris/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.0.7/lib/rails/application.rb:77:in `method_missing'
/Users/joris/Desktop/Projects/Rails/dummy_app/Rakefile:7:in `<top (required)>'
/Users/joris/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.0/lib/rake/rake_module.rb:25:in `load'
/Users/joris/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.0/lib/rake/rake_module.rb:25:in `load_rakefile'
/Users/joris/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.0/lib/rake/application.rb:495:in `raw_load_rakefile'
/Users/joris/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.0/lib/rake/application.rb:78:in `block in load_rakefile'
/Users/joris/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.0/lib/rake/application.rb:129:in `standard_exception_handling'
/Users/joris/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.0/lib/rake/application.rb:77:in `load_rakefile'
/Users/joris/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.0/lib/rake/application.rb:61:in `block in run'
/Users/joris/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.0/lib/rake/application.rb:129:in `standard_exception_handling'
/Users/joris/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.0/lib/rake/application.rb:59:in `run'
/Users/joris/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.0/bin/rake:31:in `<top (required)>'
/Users/joris/.rvm/gems/ruby-1.9.2-p180/bin/rake:19:in `load'
/Users/joris/.rvm/gems/ruby-1.9.2-p180/bin/rake:19:in `<main>'

Had something similar earlier, where I had to downgrade my Rake (0.9) back to 0.8.7. I upgraded my gems since though; should I just downgrade again or is there a way to fix this and keep using Rake 0.9?

UPDATE:

After downgrading to Rake 0.8.7:

s$ rake doc:rails
(in /Users/joris/Desktop/Projects/Rails/dummy)
/Users/joris/.rvm/gems/ruby-1.9.2-p180@global/gems/rake-0.8.7/lib/rake.rb:32: warning: already initialized constant RAKEVERSION
/Users/joris/.rvm/gems/ruby-1.9.2-p180@global/gems/rake-0.8.7/lib/rake/alt_system.rb:32: warning: already initialized constant WINDOWS
WARNING: Possible conflict with Rake extension: String#ext already exists
WARNING: Possible conflict with Rake extension: String#pathmap already exists
/Users/joris/.rvm/gems/ruby-1.9.2-p180@global/gems/rake-0.8.7/lib/rake.rb:404: warning: already initialized constant EMPTY_TASK_ARGS
/Users/joris/.rvm/gems/ruby-1.9.2-p180@global/gems/rake-0.8.7/lib/rake.rb:452: warning: already initialized constant EMPTY
/Users/joris/.rvm/gems/ruby-1.9.2-p180@global/gems/rake-0.8.7/lib/rake.rb:960: warning: already initialized constant RUBY_EXT
/Users/joris/.rvm/gems/ruby-1.9.2-p180@global/gems/rake-0.8.7/lib/rake.rb:964: warning: already initialized constant RUBY
/Users/joris/.rvm/gems/ruby-1.9.2-p180@global/gems/rake-0.8.7/lib/rake.rb:1033: warning: already initialized constant LN_SUPPORTED
/Users/joris/.rvm/gems/ruby-1.9.2-p180@global/gems/rake-0.8.7/lib/rake.rb:1242: warning: already initialized constant ARRAY_METHODS
/Users/joris/.rvm/gems/ruby-1.9.2-p180@global/gems/rake-0.8.7/lib/rake.rb:1245: warning: already initialized constant MUST_DEFINE
/Users/joris/.rvm/gems/ruby-1.9.2-p180@global/gems/rake-0.8.7/lib/rake.rb:1249: warning: already initialized constant MUST_NOT_DEFINE
/Users/joris/.rvm/gems/ruby-1.9.2-p180@global/gems/rake-0.8.7/lib/rake.rb:1253: warning: already initialized constant SPECIAL_RETURN
/Users/joris/.rvm/gems/ruby-1.9.2-p180@global/gems/rake-0.8.7/lib/rake.rb:1259: warning: already initialized constant DELEGATING_METHODS
/Users/joris/.rvm/gems/ruby-1.9.2-p180@global/gems/rake-0.8.7/lib/rake.rb:1569: warning: already initialized constant DEFAULT_IGNORE_PATTERNS
/Users/joris/.rvm/gems/ruby-1.9.2-p180@global/gems/rake-0.8.7/lib/rake.rb:1575: warning: already initialized constant DEFAULT_IGNORE_PROCS
/Users/joris/.rvm/gems/ruby-1.9.2-p180@global/gems/rake-0.8.7/lib/rake.rb:1612: warning: already initialized constant FileList
/Users/joris/.rvm/gems/ruby-1.9.2-p180@global/gems/rake-0.8.7/lib/rake.rb:1638: warning: already initialized constant EARLY
/Users/joris/.rvm/gems/ruby-1.9.2-p180@global/gems/rake-0.8.7/lib/rake.rb:1968: warning: already initialized constant DEFAULT_RAKEFILES
rake aborted!
stack level too deep

Using @Zabba’s approach:

No Rakefile found (looking for: rakefile, Rakefile, rakefile.rb, Rakefile.rb)

after editing the Rakefile.

Thanks in advance!

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1 Answer

  1. Editorial Team

    Rake 0.9.0 has this problem.
    To fix it, either downgrade to rake 0.8.7 or continue to use rake 0.9.0 and add the following just before the My_app_name::Application.load_tasks in Rakefile in the root of your app’s directory:

    #in case there is an error "undefined method `task'", add this (rake 0.9.0 has this bug)
module ::My_app_name
  class Application
    include Rake::DSL
  end
end

module ::RakeFileUtils
  extend Rake::FileUtilsExt
end

#code added above this line    
My_app_name::Application.load_tasks
    • 0