耙子中止！ Rails 无法生成

Question

我正在学习 rails 并逐步学习 lynda 视频系列。我试过耙子。它给出以下错误。

$ rake generate migration DoNothingYet 
rake aborted!
Don't know how to build task 'generate'

我使用 --trace 来查找问题。但是，它并没有指出错误。

$ rake generate migration DoNothingYet --trace
rake aborted!
Don't know how to build task 'generate'
/Users/boss/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/task_manager.rb:62:in `[]'
/Users/boss/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/application.rb:149:in `invoke_task'
/Users/boss/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/application.rb:106:in `block (2 levels) in top_level'
/Users/boss/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/application.rb:106:in `each'
/Users/boss/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/application.rb:106:in `block in top_level'
/Users/boss/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/application.rb:115:in `run_with_threads'
/Users/boss/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/application.rb:100:in `top_level'
/Users/boss/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/application.rb:78:in `block in run'
/Users/boss/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/application.rb:176:in `standard_exception_handling'
/Users/boss/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/application.rb:75:in `run'
/Users/boss/.rbenv/versions/2.2.2/bin/rake:33:in `<main>'

Answer 1

你应该使用 rails 命令，而不是 rake：

rails generate migration DoNothingYet

祝你好运！

耙子中止！ Rails 无法生成

Rake aborted! Rails can't generate

ruby

rake-task

ruby-on-rails-4