小编imK*_*esh的帖子

可能重复:
在Heroku中运行Rails 2.3样式插件和弃用警告任务

DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support
 for these plugins will be removed in Rails 4.0. Move them out and bundle them i
n your Gemfile, or fold them in to your app as lib/myplugin/* and config/initial
izers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonr
ails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required
)> at /app/Rakefile:7)

显示3次,有时显示2次意味着什么？有什么特别的意思吗？ 如何解决db:migrate的这个问题

当我们开发一个网站时它是否也适合移动视图？ 如果没有,那么如果我想开发桌面视图和移动视图,需要进行哪些更改？ 请给我建议......