为什么 Heroku 在 Rails 3.1 应用程序中跳过预编译步骤？

Question

我正在摆弄 Rails 3.1 应用程序并部署到 Heroku Cedar。

推送应用程序时，Heroku 会跳过预编译步骤，而不会引发错误：

Your bundle is complete! It was installed into ./vendor/bundle
Cleaning up the bundler cache.
-----> Writing config/database.yml to read from DATABASE_URL
-----> Rails plugin injection
       Injecting rails_log_stdout
       Injecting rails3_serve_static_assets
-----> Discovering process types
       Procfile declares types      -> (none)
       Default types for Ruby/Rails -> console, rake, web, worker
-----> Compiled slug size is 16.2MB
-----> Launching... done, v35

我上次推送到 Heroku 时（可能是一个月前），预编译资产没有问题。

gem 'rails', '3.1.1.rc2', :git => 'git://github.com/rails/rails.git', :branch => '3-1-stable'

更新：

我能够通过从 application.rb: 中删除以下内容

 if defined?(Bundler)
   # If you precompile assets before deploying to production, use this line
   Bundler.require *Rails.groups(:assets => %w(development test))
   # If you want your assets lazily compiled in production, use this line
   # Bundler.require(:default, :assets, Rails.env)
 end

并替换为：

# If you have a Gemfile, require the gems listed there, including any gems
# you've limited to :test, :development, or :production.
Bundler.require *Rails.groups(:assets) if defined?(Bundler)

Answer 1

我知道这可能听起来很自负，但是您确定使用 -stack cedar 创建了 Heroku 应用程序吗？

Answer 2

您还可以检查链轮是否已启用，就像我一样 这里当我遇到同样的问题时。