0

按照本教程，我将部署步骤应用Heroku到2.3.5 Deploying the demo app.

当我运行 command:> heroku rake db:migrate时，我得到以下信息：

$ heroku rake db:migrate
(in /app)
rake aborted!
uninitialized constant Rake::DSL
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:2482:in `const_missing'
/app/.bundle/gems/ruby/1.9.1/gems/rake-0.9.2/lib/rake/tasklib.rb:8:in `<class:Ta
skLib>'
/app/.bundle/gems/ruby/1.9.1/gems/rake-0.9.2/lib/rake/tasklib.rb:6:in `<module:R
ake>'
/app/.bundle/gems/ruby/1.9.1/gems/rake-0.9.2/lib/rake/tasklib.rb:3:in `<top (req
uired)>'
/app/.bundle/gems/ruby/1.9.1/gems/rdoc-3.8/lib/rdoc/task.rb:37:in `require'
/app/.bundle/gems/ruby/1.9.1/gems/rdoc-3.8/lib/rdoc/task.rb:37:in `<top (require
d)>'
/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.9/lib/rails/tasks/documentation.r
ake:2:in `require'
/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.9/lib/rails/tasks/documentation.r
ake:2:in `<top (required)>'
/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.9/lib/rails/tasks.rb:15:in `load'

/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.9/lib/rails/tasks.rb:15:in `block
 in <top (required)>'
/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.9/lib/rails/tasks.rb:6:in `each'
/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.9/lib/rails/tasks.rb:6:in `<top (
required)>'
/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.9/lib/rails/application.rb:215:in
 `require'
/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.9/lib/rails/application.rb:215:in
 `initialize_tasks'
/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.9/lib/rails/application.rb:139:in
 `load_tasks'
/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.9/lib/rails/application.rb:77:in
`method_missing'
/app/Rakefile:7:in `<top (required)>'
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:2373:in `load'
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:2373:in `raw_load_rakefile'
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:2007:in `block in load_rakefile'
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:2058:in `standard_exception_handling'
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:2006:in `load_rakefile'
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:1991:in `run'
/usr/ruby1.9.2/bin/rake:31:in `<main>'

这是为什么？而且，我该如何解决这个问题？

谢谢。

4

2 回答 2

5

我在这里有一篇关于它的博客文章：

http://codeglot.com/posts/13-you_have_already_activated_rake_0_9_2

你有两个选择。保留最新的 gem 并执行以下操作：

# Add your own tasks in files placed in lib/tasks ending in .rake,
# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.

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

或者您需要指定旧版本的 rake：

gem list

然后看看你有哪个版本的 rake。

gem uninstall rake -v=0.9.1

然后在您的捆绑器中指定旧版本：

gem 'rake', '0.8.7'
于 2011-07-29T18:35:42.803 回答
1

此链接可能会有所帮助：修复未初始化的常量 rake heroku

形成那个帖子：

把它放在你上面需要'rake'的Rakefile中：

需要'rake/dsl_definition'

于 2011-07-29T19:10:47.450 回答