ruby on rails error rake db:create

问题

I have been using ruby on rails fine no problem, now suddenly every time I run rake db:create I get the following errors:

C:\>cd xampp

C:\xampp>cd htdocs

C:\xampp\htdocs>cd what

C:\xampp\htdocs\what>rake db:create
rake aborted!
undefined method `task' for #<What::Application:0x20eb1e0>

(See full trace by running task with --trace)

C:\xampp\htdocs\what>

Any help please???

Here is all my cmd

   C:\xampp\htdocs\comeon>rake db:create --trace
rake aborted!
undefined method `task' for #<Comeon::Application:0x211fb30>
C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:215:
in `initialize_tasks'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:139:
in `load_tasks'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:77:i
n `method_missing'
C:/xampp/htdocs/comeon/Rakefile:7:in `<top (required)>'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.0/lib/rake/rake_module.rb:25:in `lo
ad'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.0/lib/rake/rake_module.rb:25:in `lo
ad_rakefile'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.0/lib/rake/application.rb:495:in `r
aw_load_rakefile'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.0/lib/rake/application.rb:78:in `bl
ock in load_rakefile'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.0/lib/rake/application.rb:129:in `s
tandard_exception_handling'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.0/lib/rake/application.rb:77:in `lo
ad_rakefile'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.0/lib/rake/application.rb:61:in `bl
ock in run'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.0/lib/rake/application.rb:129:in `s
tandard_exception_handling'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.0/lib/rake/application.rb:59:in `ru
n'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.0/bin/rake:31:in `<top (required)>'

C:/Ruby192/bin/rake:19:in `load'
C:/Ruby192/bin/rake:19:in `<main>'

回答1:

This will help you.

gem uninstall rake

gem install rake -v 0.8.7

If Still the problem exists, uninstall rake and install using

gem uninstall rake
gem install rake

for more info

Undefined method 'task' using Rake 0.9.0

回答2:

I was having the same problem, found a post by Jim Weirich in git hub that solved my problem

https://github.com/jimweirich/rake/issues/33#issuecomment-1213705

Two issues here: (1) dimitko's issue is that the built in rake command is being mixed with the new gem's library files. Arranging your $PATH environment list so that the gem version of rake has precendence over the built-in version should fix that. If you are using bundler, you might also want to try 'bundle exec rake'.

The second issue (mjansen401 and r00k above) is that 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 rails is updated to work with Rake 0.9.x, put the following in your project Rakefile before the call to Application.load_tasks:

class Rails::Application
  include Rake::DSL if defined?(Rake::DSL)
end

Let me know if these work for you.

Hope it helps

来源：https://stackoverflow.com/questions/6122966/ruby-on-rails-error-rake-dbcreate

标签

ruby-on-rails

ruby

rake