Rails 4 Heroku资产：预编译失败

Andy 发表于 Dev

安迪

我有一个奇怪的情况，突然面临预编译失败，老实说我由于某种原因看不到问题。

我在这里https://gist.github.com/malagodia/8506722已添加了日志和参考文件的要点

令我感到困惑的是，我阅读了有关数据库连接的Heroku建议，并明确确保application.rb包含

config.assets.initialize_on_precompile = false

这是日志输出错误，要点上的完整日志

Running: rake assets:precompile
       rake aborted!
       undefined method `[]=' for nil:NilClass
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/config/initializers/database_connection.rb:7:in `block (2 levels) in <top (required)>'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/lazy_load_hooks.rb:38:in `instance_eval'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/lazy_load_hooks.rb:38:in `execute_hook'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/lazy_load_hooks.rb:28:in `block in on_load'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/lazy_load_hooks.rb:27:in `each'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/lazy_load_hooks.rb:27:in `on_load'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/config/initializers/database_connection.rb:5:in `block in <top (required)>'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/lazy_load_hooks.rb:36:in `call'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/lazy_load_hooks.rb:45:in `block in run_load_hooks'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/lazy_load_hooks.rb:44:in `each'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/lazy_load_hooks.rb:44:in `run_load_hooks'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/application/finisher.rb:62:in `block in <module:Finisher>'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/initializable.rb:30:in `instance_exec'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/initializable.rb:30:in `run'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/initializable.rb:55:in `block in run_initializers'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/initializable.rb:54:in `run_initializers'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/application.rb:215:in `initialize!'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/railtie/configurable.rb:30:in `method_missing'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/config/environment.rb:5:in `<top (required)>'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `require'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `block in require'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:214:in `load_dependency'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `require'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/application.rb:189:in `require_environment!'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/application.rb:250:in `block in run_tasks_blocks'
       /tmp/build_2826537d-5a5c-43f7-b792-45112618d3df/vendor/bundle/ruby/2.0.0/gems/sprockets-rails-2.0.1/lib/sprockets/rails/task.rb:54:in `block (2 levels) in define'
       Tasks: TOP => environment
       (See full trace by running task with --trace)  !  !     Precompiling assets failed.  !

 !     Push rejected, failed to compile Ruby app