可能重复：
Rails 2.3-style plugins and deprecation warnings running task in Heroku
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
的问题答案 0 :(得分：5)
在slug编译过程中，Heroku“注入”了一些插件。
-----> Rails plugin injection
Injecting rails_log_stdout
Injecting rails3_serve_static_assets
请参阅Rails 2.3-style plugins and deprecation warnings running task in Heroku