Rake 中止：“错误：'rake/rdoctask' 已过时且不再受支持。请改用 'rdoc/task'（在 RDoc 2.4.2+ 中可用）。”答案

【问题标题】：Rake aborted: "ERROR: 'rake/rdoctask' is obsolete and no longer supported. Use 'rdoc/task' (available in RDoc 2.4.2+) instead."Rake 中止：“错误：'rake/rdoctask' 已过时且不再受支持。请改用 'rdoc/task'（在 RDoc 2.4.2+ 中可用）。”
【发布时间】：2013-06-25 11:29:41
【问题描述】：

尝试执行时：

rake db:migrate

终端回答：

rake aborted!
ERROR: 'rake/rdoctask' is obsolete and no longer supported. Use 'rdoc/task' (available in RDoc 2.4.2+) instead.
/Users/Charles/.rvm/gems/ruby-1.9.3-p429@rails3tutorial/gems/railties-3.0.5/lib/rails/tasks/documentation.rake:1:in `require'
/Users/Charles/.rvm/gems/ruby-1.9.3-p429@rails3tutorial/gems/railties-3.0.5/lib/rails/tasks/documentation.rake:1:in `<top (required)>'
/Users/Charles/.rvm/gems/ruby-1.9.3-p429@rails3tutorial/gems/railties-3.0.5/lib/rails/tasks.rb:15:in `load'
/Users/Charles/.rvm/gems/ruby-1.9.3-p429@rails3tutorial/gems/railties-3.0.5/lib/rails/tasks.rb:15:in `block in <top (required)>'
/Users/Charles/.rvm/gems/ruby-1.9.3-p429@rails3tutorial/gems/railties-3.0.5/lib/rails/tasks.rb:6:in `each'
/Users/Charles/.rvm/gems/ruby-1.9.3-p429@rails3tutorial/gems/railties-3.0.5/lib/rails/tasks.rb:6:in `<top (required)>'
/Users/Charles/.rvm/gems/ruby-1.9.3-p429@rails3tutorial/gems/railties-3.0.5/lib/rails/application.rb:213:in `require'
/Users/Charles/.rvm/gems/ruby-1.9.3-p429@rails3tutorial/gems/railties-3.0.5/lib/rails/application.rb:213:in `initialize_tasks'
/Users/Charles/.rvm/gems/ruby-1.9.3-p429@rails3tutorial/gems/railties-3.0.5/lib/rails/application.rb:139:in `load_tasks'
/Users/Charles/.rvm/gems/ruby-1.9.3-p429@rails3tutorial/gems/railties-3.0.5/lib/rails/application.rb:77:in `method_missing'
/Users/Charles/rails_projects/demo_app/Rakefile:7:in `<top (required)>'
/Users/Charles/.rvm/gems/ruby-1.9.3-p429@rails3tutorial/bin/ruby_noexec_wrapper:14:in `eval'
/Users/Charles/.rvm/gems/ruby-1.9.3-p429@rails3tutorial/bin/ruby_noexec_wrapper:14:in `<main>'
(See full trace by running task with --trace)

这里提出的解决方案都没有（特别是降级 gem，或修改 Rakefile（以下）工作（rake 版本 10.0.1）

require File.expand_path('../config/application', __FILE__)
require 'rake'

DemoApp::Application.load_tasks

感谢您的帮助，

【问题讨论】：

标签： ruby-on-rails rake dbmigrate rakefile

【解决方案1】：

在 Gemfile 中指定您的 rake 版本为 0.8.7 并执行命令 bundle exec rake db:migrate

【讨论】：

【解决方案2】：

我假设您使用的是 rails 版本 3.0.5。将您的 Gemfile 更新为 gem 'rails', '3.0.20'，然后运行 bundle update rails

【讨论】：