预编译资产失败答案

【问题标题】：Precompiling assets failed预编译资产失败
【发布时间】：2013-11-18 04:55:17
【问题描述】：

我正在推送一个几个月没有更新的应用程序并且遇到了这个问题。我只更改了代码中的几个变量。不知道为什么它突然对我这样做。

 !
 !     Precompiling assets failed.
 !

 !     Push rejected, failed to compile Ruby app

To git@heroku.com:myapp.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'git@heroku.com:myapp.git'


   rake aborted!
   could not connect to server: Connection refused
   Is the server running on host "127.0.0.1" and accepting
   TCP/IP connections on port 5432?
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:1216:in `initialize'
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:1216:in `new'
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:1216:in `connect'
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:324:in `initialize'
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in `new'
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in `postgresql_connection'
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:315:in `new_connection'
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:325:in `checkout_new_connection'
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:247:in `block (2 levels) in checkout'
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `loop'
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `block in checkout'
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:239:in `checkout'
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:102:in `block in connection'
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:101:in `connection'
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:410:in `retrieve_connection'
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_specification.rb:171:in `retrieve_connection'
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_specification.rb:145:in `connection'
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/model_schema.rb:308:in `clear_cache!'
   /tmp/build_8c6e6263-c5c9-44ac-88ad-7eadb7c4c0e6/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.13/lib/active_record/railtie.rb:104:in `block (2 levels) in <class:Railtie>'

【问题讨论】：

必须有一个堆栈跟踪来指示失败的原因。你能从那里添加前几行吗？
在下面查看我的答案。如果它没有解决您的问题，请告诉我。
如果解决了您的问题，请接受答案。有助于清除问题流中的混乱情况。

标签： ruby-on-rails ruby-on-rails-3 heroku

【解决方案1】：

资产重新编译问题的最常见原因可以在 heroku 支持页面上找到 here。

基于错误消息中提到的 Postgres，我会尝试将 config/application.rb 中的以下行更改为 false，如下所示：config.assets.initialize_on_precompile = false。

【讨论】：

【解决方案2】：

您应该通过确保以下行位于您的 config/application.rb 中来防止初始化您的应用程序并连接到数据库：

config.assets.initialize_on_precompile = false

【讨论】：