尝试运行rake db：migrate，返回错误。
然后用--trace再次运行它，这是错误：
Paul-Denlingers-MacBook-Pro:things_i_bought pdenlinger$ rake db:migrate --trace
task' for #<ThingsIBought::Application:0x00000101679880>
/Users/pdenlinger/.rvm/gems/ruby-1.9.2-p0/gems/railties-3.0.7/lib/rails/application.rb:215:in initialize_tasks'
/Users/pdenlinger/.rvm/gems/ruby-1.9.2-p0/gems/railties-3.0.7/lib/rails/application.rb:139:in load_tasks'
/Users/pdenlinger/.rvm/gems/ruby-1.9.2-p0/gems/railties-3.0.7/lib/rails/application.rb:77:in method_missing'
/ Users / pdenlinger / rails_projects / things_i_bought / Rakefile：7：in <top (required)>'
/Users/pdenlinger/.rvm/gems/ruby-1.9.2-p0/gems/rake-0.9.0/lib/rake/rake_module.rb:25:in load'
/Users/pdenlinger/.rvm/gems/ruby-1.9.2-p0/gems/rake-0.9.0/lib/rake/rake_module.rb:25:in load_rakefile'
/Users/pdenlinger/.rvm/gems/ruby-1.9.2-p0/gems/rake-0.9.0/lib/rake/application.rb:495:in raw_load_rakefile'
/Users/pdenlinger/.rvm/gems/ruby-1.9.2-p0/gems/rake-0.9.0/lib/rake/application.rb:78:in block in load_rakefile'
/Users/pdenlinger/.rvm/gems/ruby-1.9.2-p0/gems/rake-0.9.0/lib/rake/application.rb:129:in standard_exception_handling'
/Users/pdenlinger/.rvm/gems/ruby-1.9.2-p0/gems/rake-0.9.0/lib/rake/application.rb:77:in load_rakefile'
/Users/pdenlinger/.rvm/gems/ruby-1.9.2-p0/gems/rake-0.9.0/lib/rake/application.rb:61:in阻止运行'
/Users/pdenlinger/.rvm/gems/ruby-1.9.2-p0/gems/rake-0.9.0/lib/rake/application.rb:129:in standard_exception_handling'
/Users/pdenlinger/.rvm/gems/ruby-1.9.2-p0/gems/rake-0.9.0/lib/rake/application.rb:59:in run'
/Users/pdenlinger/.rvm/gems/ruby-1.9.2-p0/gems/rake-0.9.0/bin/rake:31:in <top (required)>'
/Users/pdenlinger/.rvm/gems/ruby-1.9.2-p0/bin/rake:19:in load'
/Users/pdenlinger/.rvm/gems/ruby-1.9.2-p0/bin/rake:19:in`'
它说“任务”是一种未定义的方法;这是什么意思？我该怎么做才能解决它？
运行Rails 3.0.7
答案 0 :(得分：1)
看看这个question。您可以在Gemfile中恢复为0.8.7或修补您的Rakefile。
答案 1 :(得分：0)
也许这会有所帮助。 - ＆GT; Gist : broken rakefile
答案 2 :(得分：-1)
Rake 0.9.0打破了一些事情。
在此期间，请尝试：
bundle exec rake db:migrate