rake db：迁移错误，“任务”是未定义的方法

Question

已尝试运行 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

rake 中止！ 未定义的方法task' for #<ThingsIBought::Application:0x00000101679880> /Users/pdenlinger/.rvm/gems/ruby-1.9.2-p0/gems/railties-3.0.7/lib/rails/application.rb:215:ininitialize_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:inmethod_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:inload' /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:inraw_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:instandard_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:inblock in run' /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:inrun' /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:inload' /Users/pdenlinger/.rvm/gems/ruby-1.9.2-p0/bin/rake:19:in `'

它说'task'是一个未定义的方法；这是什么意思？我能做些什么来解决它？

运行 Rails 3.0.7

Answer 1

看看这个question。您可以在 Gemfile 中恢复为 rake 0.8.7 或修补您的 Rakefile。

Answer 2

也许这会有所帮助。 ->Gist : broken rakefile

Answer 3

Rake 0.9.0 破坏了一些东西。

与此同时，尝试：

bundle exec rake db:migrate