我有一个非常令人沮丧的问题:耙子是愚蠢的.
以下是问题的解决方法:
$ rails new test_app
$ rails generate scaffold new_scaffold field1:string field2:text
这两个工作都很好,但是当我这样做时,
$ rake db:migrate
我收到以下错误.
(in /home/mikhail/test_app)
rake aborted!
uninitialized constant Rake::DSL
/usr/lib/ruby/1.9.1/rake.rb:2482:in `const_missing'
/usr/lib/ruby/gems/1.9.1/gems/rake-0.9.0/lib/rake/tasklib.rb:8:in `<class:TaskLib>'
/usr/lib/ruby/gems/1.9.1/gems/rake-0.9.0/lib/rake/tasklib.rb:6:in `<module:Rake>'
/usr/lib/ruby/gems/1.9.1/gems/rake-0.9.0/lib/rake/tasklib.rb:3:in `<top (required)>'
/usr/lib/ruby/gems/1.9.1/gems/rake-0.9.0/lib/rake/rdoctask.rb:20:in `require'
/usr/lib/ruby/gems/1.9.1/gems/rake-0.9.0/lib/rake/rdoctask.rb:20:in `<top (required)>'
/usr/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/tasks/documentation.rake:1:in `require'
/usr/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/tasks/documentation.rake:1:in `<top (required)>'
/usr/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/tasks.rb:15:in `load'
/usr/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/tasks.rb:15:in `block in <top (required)>'
/usr/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/tasks.rb:6:in `each'
/usr/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/tasks.rb:6:in `<top (required)>'
/usr/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:214:in `require'
/usr/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:214:in `initialize_tasks'
/usr/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:139:in `load_tasks'
/usr/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:77:in `method_missing'
/home/mikhail/test_app/Rakefile:7:in `<top (required)>'
/usr/lib/ruby/1.9.1/rake.rb:2373:in `load'
/usr/lib/ruby/1.9.1/rake.rb:2373:in `raw_load_rakefile'
/usr/lib/ruby/1.9.1/rake.rb:2007:in `block in load_rakefile'
/usr/lib/ruby/1.9.1/rake.rb:2058:in `standard_exception_handling'
/usr/lib/ruby/1.9.1/rake.rb:2006:in …我刚开始使用rails,我已经在我的ubuntu 11.04上完成了本教程http://pragmaticstudio.com/blog/2010/9/23/install-rails-ruby-mac的所有步骤,但是我无法运行rake db :迁移.
它给出了这个输出:
/home/breedish/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/version.rb:4: warning: already initialized constant MAJOR
/home/breedish/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/version.rb:5: warning: already initialized constant MINOR
/home/breedish/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/version.rb:6: warning: already initialized constant BUILD
/home/breedish/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/version.rb:3: warning: already initialized constant NUMBERS
/home/breedish/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/version.rb:9: warning: already initialized constant VERSION
/home/breedish/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake.rb:26: warning: already initialized constant RAKEVERSION
/home/breedish/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/early_time.rb:17: warning: already initialized constant EARLY
/home/breedish/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/alt_system.rb:32: warning: already initialized constant WINDOWS
/home/breedish/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/application.rb:28: warning: already initialized constant DEFAULT_RAKEFILES
WARNING: Possible conflict with Rake extension: String#ext already exists
WARNING: Possible conflict with Rake extension: String#pathmap already exists
/home/breedish/.rvm/gems/ruby-1.9.2-p290@global/gems/rake-0.9.2/lib/rake/task_arguments.rb:73: …