132

I just updated Rake to the latest version (0.9.0.beta.4) and the rake command ends up with the following error message:

rake aborted!
undefined method `task' for #<Anelis::Application:0x9223b6c>

Here is the trace:

undefined method `task' for #<Anelis::Application:0x97ef80c>
/usr/local/rvm/gems/ruby-1.9.2-p136/gems/railties-3.0.3/lib/rails/application.rb:214:in `initialize_tasks'
/usr/local/rvm/gems/ruby-1.9.2-p136/gems/railties-3.0.3/lib/rails/application.rb:139:in `load_tasks'
/usr/local/rvm/gems/ruby-1.9.2-p136/gems/railties-3.0.3/lib/rails/application.rb:77:in `method_missing'
/home/amokrane/Documents/prog/web/learning_rails/anelis/Rakefile:7:in `load_string'
/usr/local/rvm/gems/ruby-1.9.2-p136/gems/rake-0.9.0.beta.4/lib/rake/environment.rb:28:in `eval'
/usr/local/rvm/gems/ruby-1.9.2-p136/gems/rake-0.9.0.beta.4/lib/rake/environment.rb:28:in `load_string'
/usr/local/rvm/gems/ruby-1.9.2-p136/gems/rake-0.9.0.beta.4/lib/rake/environment.rb:16:in `load_rakefile'
/usr/local/rvm/gems/ruby-1.9.2-p136/gems/rake-0.9.0.beta.4/lib/rake/application.rb:495:in `raw_load_rakefile'
/usr/local/rvm/gems/ruby-1.9.2-p136/gems/rake-0.9.0.beta.4/lib/rake/application.rb:78:in `block in load_rakefile'
/usr/local/rvm/gems/ruby-1.9.2-p136/gems/rake-0.9.0.beta.4/lib/rake/application.rb:129:in `standard_exception_handling'
/usr/local/rvm/gems/ruby-1.9.2-p136/gems/rake-0.9.0.beta.4/lib/rake/application.rb:77:in `load_rakefile'
/usr/local/rvm/gems/ruby-1.9.2-p136/gems/rake-0.9.0.beta.4/lib/rake/application.rb:61:in `block in run'
/usr/local/rvm/gems/ruby-1.9.2-p136/gems/rake-0.9.0.beta.4/lib/rake/application.rb:129:in `standard_exception_handling'
/usr/local/rvm/gems/ruby-1.9.2-p136/gems/rake-0.9.0.beta.4/lib/rake/application.rb:59:in `run'
/usr/local/rvm/gems/ruby-1.9.2-p136/gems/rake-0.9.0.beta.4/bin/rake:31:in `<top (required)>'
/usr/local/rvm/gems/ruby-1.9.2-p136/bin/rake:19:in `load'
/usr/local/rvm/gems/ruby-1.9.2-p136/bin/rake:19:in `<main>'

Anyone experienced the same issue? What could possibly be wrong? Note that I am running Rails 3.0.3, you may also be interested in the content of my Gemfile:

source 'http://rubygems.org'
gem 'rails', '3.0.3'
gem 'sqlite3-ruby', :require => 'sqlite3'
gem 'mysql2'
gem 'legacy_data'
gem 'resources_controller', :git => 'git://github.com/ianwhite/resources_controller'
gem 'will_paginate', '3.0.pre' # pagination
gem 'jquery-rails', '>= 0.2.6'
gem "rmagick" # sudo aptitude install libmagick9-dev
gem "paperclip", "~> 2.3"
gem "nested_form", :git => "git://github.com/madebydna/nested_form.git"
gem "meta_search"
gem "hirb"
gem "devise"
gem "rails_admin", :git => "git://github.com/sferik/rails_admin.git"

How can I fix this problem?

Peter Mortensen
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Amokrane Chentir
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8 Answers8

158

As explained in mordaroso's answer, there is a problem in Rake 0.9.0. You need to temporarily downgrade Rake in order to avoid it:

  1. run: gem uninstall rake -v 0.9 (add sudo unless you use rvm)

  2. add to your Gemfile: gem 'rake', '~> 0.8.7'

  3. and then run: bundle update

You can skip the first step, but then you have to run rake using bundle exec, for example:

bundle exec rake db:migrate

Otherwise you get the following error.

rake aborted!
You have already activated rake 0.9.0, but your Gemfile requires rake 0.8.7. Consider using bundle exec.

Update

As Alex Chaffee noticed in a comment for Pablo Cantero's answer, that you might need to do the following to uninstall Rake if you still see the problem

rvm use @global && gem uninstall rake -v 0.9.0
rvm use @       && gem uninstall rake -v 0.9.0

Also try the solution suggested in Duke's answer.

Community
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Andrei
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    I think this is the least "hacky" solution. You might need to run rake as `bundle exec rake` to use the working bundled version. – Stuart K May 21 '11 at 17:01
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    @Stuart K, `bundle exec rake` is needed only if rake-0.9 wasn't uninstalled. In this case one gets error message `rake aborted! You have already activated rake 0.9.0, but your Gemfile requires rake 0.8.7. Consider using bundle exec.` – Andrei May 21 '11 at 21:06
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    This issue also exists with Rails 3.0.7, with the Railties gem requiring Rake >= 0.8.7, which pulls in 0.9 as its available... – Matthew Savage May 22 '11 at 06:56
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    Even less hacky is to use: `gem 'rake', '~> 0.8.7'` – Fábio Batista May 22 '11 at 07:59
  • By "add to your Gemfile", what exactly do you mean? Where is this Gemfile? Sorry, n00b question – Adnan May 22 '11 at 22:04
119

I had the same exception when running the 0.9.0.beta.4 version of Rake. It looks like the new Rake::DSL is not loaded properly.

So I added following code to my Rakefile:

require 'rake'

# Rake Fix Code start
# NOTE: change 'Anelis' to your app's module name (see config/application.rb)
module ::Anelis
  class Application
    include Rake::DSL
  end
end

module ::RakeFileUtils
  extend Rake::FileUtilsExt
end
# Rake Fix Code end

MyApp::Application.load_tasks

That way I was able to run my Rake tasks again.

I know that this is not a elegant solution. But if you have to use the --pre version of Rake it might be all right to use this quick hack.

Peter Mortensen
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mordaroso
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  • Thanks mordaroso for the tip! – Amokrane Chentir Mar 15 '11 at 13:14
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    Make sure you change the "module ::Anelis" line to whatever matches the name of your rails app.. IE "module ::Myapp" I forgot to do that, and this solution didn't work until I realized my mistake. – Scott Swezey May 20 '11 at 17:58
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    And make sure you put this between `require 'rake'` and `MyApp::Application.load_tasks` – Jits May 20 '11 at 22:40
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    Thanks mordaroso for the tips. Change Anelis to your app name and add those magic code before the line YourAppName::Application.load_tasks otherwise the error still occurs – JNN May 20 '11 at 20:12
  • Looks like this has persisted into the 0.9.0 full release. I've pulled rake back to 0.8.7 in my Gemfile.lock until this is fixed in rails and/or rake. The answer below by Andrei seems to suggest this. – sj26 May 23 '11 at 03:38
  • Worked for me. What i don't understand is that this happened suddenly, and i don't think i updated rake in the mean time. – Max Williams May 23 '11 at 15:16
  • Check out the code I got from the rake wiki at the bottom of the page. – Duke May 24 '11 at 07:55
  • instead of asking folks to remember to change "Anelis", perhaps the code snippet should just be ``Rails.application.class_eval do; include Rake::DSL; end`` – choonkeat Nov 25 '12 at 16:46
40

Note: This was just fixed in Rails 3.0.8

The new version of Rake does not put its DSL commands (task, file, desc, import, etc.) in the root of the Object namespace anymore (placing them in Object meant every object has a task command, not very nice. The DSL commands are available by mixing in the Rake::DSL module into any module needing the commands.

Until Ruby on Rails is updated to work with Rake 0.9.x, put the following in your project Rakefile after "require rake" and before the call to Application.load_tasks:

class Rails::Application
  include Rake::DSL if defined?(Rake::DSL)
end
Peter Mortensen
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Duke
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  • Am using Rails 3.0.7 ,with rake updated to 0.9.0 but by default in Gemfile.lock it is 0.8.7 so if we updated to 0.9.0 it works fine thanx Duke – Jagdish Barabari Jun 08 '11 at 16:02
16

I've created an issue for rails_admin about this same error.

The answer:

This is a general Rails problem: http://twitter.com/dhh/status/71966528744071169

There should be a 3.0.8 release soon that fixes it. In the mean time, you can add the following line to your Gemfile:

gem 'rake', '~> 0.8.7'

It's a problem in Rake (0.9.0), it was announced by DHH on Twitter.

Rake 0.9, which was released yesterday, broke Rails (and others). While we wait for a fix, you'll want gem 'rake', '0.8.7' in your Gemfile.

Pablo Cantero
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    This might not be sufficient, if your PATH still has rake 0.9.0's /bin directory on it. To really uninstall rake, you have to do `gem uninstall rake --version 0.9.0 && gem install rake --version 0.8.7` (the second install is to get the executable back). – AlexChaffee May 26 '11 at 20:07
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    And if rake 0.9.0 got insto your rvm global gemset, you have to do `rvm use @global && gem uninstall rake --version 0.9.0 && rvm use @ && gem uninstall rake --version 0.9.0 && gem install rake --version 0.8.7` – AlexChaffee May 26 '11 at 20:08
7

This has been fixed in Ruby on Rails 3.0.8.rc1 which should be released in a few days time.

Peter Mortensen
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Andrew Nesbitt
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3

Rake 0.9.1 has just been released which reverses the change that caused this error but adds a deprecation warning: https://github.com/jimweirich/rake/commit/44aec3ceac085740bce0c385bccd65fc4d1d911c

Andrew Nesbitt
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2

I use rvm, but uninstalling doesn't help me. So I manually remove all 0.9 files from .rvm/gems/ruby@global directory and everything becomes as before!

Amokrane Chentir
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mikdiet
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0

without the need to uninstall Rake 0.9.x, add

gem 'rake', '~> 0.8.7'

to your Gemfile and just type

bundle exec rake -T

Helios
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