Problems running rake db:migrate in a Ruby on Rails app

Question

I am trying to run rake db:migrate in my Ruby on Rails application.

However, it is giving me a "uninitialized constant" exception. From Googling this, it looks like the solution is to update the rake version. So I changed my gemfile and ran bundle update.

However, the exception is still happening... I think because I didn't update the right rake library.

How do I fix this? How can I update rake for the other path too, or exclusively run rake through the bundle thing?

My-Comp:my_project username$ bundle show rake
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2
My-Comp:my_project username$ which rake
/usr/bin/rake
My-Comp:my_project username$ rake -V
rake, version 0.8.7

(See - they are not the same!)

My-Comp:my_project username$ rake db:migrate --trace
(in /Users/username/projects/my_project)
rake aborted!
uninitialized constant Rake::DSL
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rake.rb:2503:in `const_missing'
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/tasklib.rb:8
/Library/Ruby/Gems/1.8/gems/rdoc-3.12/lib/rdoc/task.rb:37:in `require'
/Library/Ruby/Gems/1.8/gems/rdoc-3.12/lib/rdoc/task.rb:37
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/tasks/documentation.rake:2:in `require'
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/tasks/documentation.rake:2
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/tasks.rb:15:in `load'
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/tasks.rb:15
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/tasks.rb:6:in `each'
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/tasks.rb:6
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/application.rb:289:in `require'
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/application.rb:289:in `initialize_tasks'
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/railtie.rb:184:in `instance_exec'
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/railtie.rb:184:in `load_tasks'
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/railtie.rb:184:in `each'
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/railtie.rb:184:in `load_tasks'
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/engine.rb:424:in `load_tasks'
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/application.rb:145:in `load_tasks'
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/railtie/configurable.rb:30:in `send'
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/railtie/configurable.rb:30:in `method_missing'
/Users/username/projects/my_project/Rakefile:7
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rake.rb:2383:in `load'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rake.rb:2383:in `raw_load_rakefile'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rake.rb:2017:in `load_rakefile'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rake.rb:2068:in `standard_exception_handling'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rake.rb:2016:in `load_rakefile'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rake.rb:2000:in `run'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rake.rb:2068:in `standard_exception_handling'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rake.rb:1998:in `run'
/usr/bin/rake:31

What do you have in your Gemfile? You should specify the version of rake you want and run bundle install. Also, which version of Ruby are you running? — brad
– brad, Commented Apr 22, 2012 at 23:44

megas · Accepted Answer · 2012-04-23 00:02:31Z

1

Try this command:

bundle exec rake db:migrate

bundle exec executes a command in the context of your gemfile.

answered Apr 23, 2012 at 0:02

megas

21.9k12 gold badges84 silver badges134 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

Marvin K Over a year ago

OK, I think that worked. How can I update the other rake too? I tried gem update rake and it just says nothing to update. (I'd prefer to have a working rake rather than run exec all the time!)

megas Over a year ago

'Other rake too' - you mean in other projects? You should assign the rake version in the gemfile of these projects.

Marvin K Over a year ago

No, I don't mean other projects. I mean that I don't really understand the version management, so I think I've got myself two versions of rake. One is /Library/Ruby/Gems/1.8/gems/rake-0.9.2.2 the other is /usr/bin/rake. /usr/bin/rake is 0.8.7 and I need to upgrade it too, but can't figure out how. Or I need it so that "rake" executes the gem rake instead of the other one. (Look at the output I pasted in the answer)

megas Over a year ago

You should install rubygems and let this ruby's packaging system to resolve such kind of problems. The bundler will resolve the dependencies in context of project.

Marvin K Over a year ago

I added these two lines to my Rakefile, and it seems to work now (with a warning about a couple already initialized CONSTANTS: require 'rake/dsl_definition' require 'rake'

Collectives™ on Stack Overflow

Problems running rake db:migrate in a Ruby on Rails app

1 Answer 1

5 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

5 Comments

Your Answer

Sign up or log in

Post as a guest

Related