耙资产：预编译试图连接到数据库

Question

我试图调试为什么我的应用程序试图连接到我的数据库，当我运行rake assets:precompile --trace。

我可能失踪的堆栈跟踪的东西...任何人看到了相关的线？

DEPRECATION WARNING: The InstanceMethods module inside ActiveSupport::Concern will be no longer included automatically. Please define instance methods directly in ActionController::Base instead. (called from <top (required)> at /Users/Kyle/Desktop/skateparks-web/config/application.rb:4) 
** Invoke assets:precompile (first_time) 
** Execute assets:precompile 
/Users/Kyle/.rvm/rubies/ruby-1.9.2-p290/bin/ruby /Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/bin/rake assets:precompile:all RAILS_ENV=production RAILS_GROUPS=assets --trace 
DEPRECATION WARNING: The InstanceMethods module inside ActiveSupport::Concern will be no longer included automatically. Please define instance methods directly in ActionController::Base instead. (called from <top (required)> at /Users/Kyle/Desktop/skateparks-web/config/application.rb:4) 
** Invoke assets:precompile:all (first_time) 
** Execute assets:precompile:all 
** Invoke assets:precompile:primary (first_time) 
** Invoke assets:environment (first_time) 
** Execute assets:environment 
** Invoke environment (first_time) 
** Execute environment 
rake aborted! 
FATAL: database "skateparks_production" does not exist 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activerecord-3.2.0/lib/active_record/connection_adapters/postgresql_adapter.rb:1161:in `initialize' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activerecord-3.2.0/lib/active_record/connection_adapters/postgresql_adapter.rb:1161:in `new' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activerecord-3.2.0/lib/active_record/connection_adapters/postgresql_adapter.rb:1161:in `connect' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activerecord-3.2.0/lib/active_record/connection_adapters/postgresql_adapter.rb:316:in `initialize' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activerecord-3.2.0/lib/active_record/connection_adapters/postgresql_adapter.rb:27:in `new' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activerecord-3.2.0/lib/active_record/connection_adapters/postgresql_adapter.rb:27:in `postgresql_connection' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activerecord-3.2.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:277:in `new_connection' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activerecord-3.2.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:287:in `checkout_new_connection' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activerecord-3.2.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:235:in `block (2 levels) in checkout' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activerecord-3.2.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:230:in `loop' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activerecord-3.2.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:230:in `block in checkout' 
/Users/Kyle/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activerecord-3.2.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:229:in `checkout' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activerecord-3.2.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:95:in `connection' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activerecord-3.2.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:374:in `retrieve_connection' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activerecord-3.2.0/lib/active_record/connection_adapters/abstract/connection_specification.rb:168:in `retrieve_connection' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activerecord-3.2.0/lib/active_record/connection_adapters/abstract/connection_specification.rb:142:in `connection' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activerecord-3.2.0/lib/active_record/model_schema.rb:308:in `clear_cache!' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activerecord-3.2.0/lib/active_record/railtie.rb:91:in `block (2 levels) in <class:Railtie>' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activesupport-3.2.0/lib/active_support/callbacks.rb:418:in `_run__2041913228368879189__prepare__1991931652306887621__callbacks' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activesupport-3.2.0/lib/active_support/callbacks.rb:405:in `__run_callback' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activesupport-3.2.0/lib/active_support/callbacks.rb:385:in `_run_prepare_callbacks' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activesupport-3.2.0/lib/active_support/callbacks.rb:81:in `run_callbacks' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/actionpack-3.2.0/lib/action_dispatch/middleware/reloader.rb:74:in `prepare!' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/actionpack-3.2.0/lib/action_dispatch/middleware/reloader.rb:48:in `prepare!' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/railties-3.2.0/lib/rails/application/finisher.rb:48:in `block in <module:Finisher>' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/railties-3.2.0/lib/rails/initializable.rb:30:in `instance_exec' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/railties-3.2.0/lib/rails/initializable.rb:30:in `run' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/railties-3.2.0/lib/rails/initializable.rb:55:in `block in run_initializers' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/railties-3.2.0/lib/rails/initializable.rb:54:in `each' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/railties-3.2.0/lib/rails/initializable.rb:54:in `run_initializers' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/railties-3.2.0/lib/rails/application.rb:136:in `initialize!' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/railties-3.2.0/lib/rails/railtie/configurable.rb:30:in `method_missing' 
/Users/Kyle/Desktop/skateparks-web/config/environment.rb:5:in `<top (required)>' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activesupport-3.2.0/lib/active_support/dependencies.rb:251:in `require' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activesupport-3.2.0/lib/active_support/dependencies.rb:251:in `block in require' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activesupport-3.2.0/lib/active_support/dependencies.rb:236:in `load_dependency' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/activesupport-3.2.0/lib/active_support/dependencies.rb:251:in `require' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/railties-3.2.0/lib/rails/application.rb:103:in `require_environment!' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/railties-3.2.0/lib/rails/application.rb:292:in `block (2 levels) in initialize_tasks' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:205:in `call' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:205:in `block in execute' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:200:in `each' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:200:in `execute' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain' 
/Users/Kyle/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:151:in `invoke_with_call_chain' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:144:in `invoke' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/actionpack-3.2.0/lib/sprockets/assets.rake:89:in `block (2 levels) in <top (required)>' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:205:in `call' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:205:in `block in execute' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:200:in `each' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:200:in `execute' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain' 
/Users/Kyle/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:151:in `invoke_with_call_chain' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:176:in `block in invoke_prerequisites' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:174:in `each' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:174:in `invoke_prerequisites' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:157:in `block in invoke_with_call_chain' 
/Users/Kyle/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:151:in `invoke_with_call_chain' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:144:in `invoke' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/actionpack-3.2.0/lib/sprockets/assets.rake:56:in `block (3 levels) in <top (required)>' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:205:in `call' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:205:in `block in execute' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:200:in `each' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:200:in `execute' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain' 
/Users/Kyle/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:151:in `invoke_with_call_chain' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:144:in `invoke' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/application.rb:112:in `invoke_task' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/application.rb:90:in `block (2 levels) in top_level' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/application.rb:90:in `each' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/application.rb:90:in `block in top_level' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/application.rb:129:in `standard_exception_handling' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/application.rb:84:in `top_level' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/application.rb:62:in `block in run' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/application.rb:129:in `standard_exception_handling' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/application.rb:59:in `run' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/bin/rake:32:in `<top (required)>' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/bin/rake:19:in `load' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/bin/rake:19:in `<main>' 
Tasks: TOP => environment 
rake aborted! 
Command failed with status (1): [/Users/Kyle/.rvm/rubies/ruby-1.9.2-p290/bi...] 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/file_utils.rb:53:in `block in create_shell_runner' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/file_utils.rb:45:in `call' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/file_utils.rb:45:in `sh' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/file_utils_ext.rb:36:in `sh' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/file_utils.rb:78:in `ruby' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/file_utils_ext.rb:36:in `ruby' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/actionpack-3.2.0/lib/sprockets/assets.rake:9:in `ruby_rake_task' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/actionpack-3.2.0/lib/sprockets/assets.rake:17:in `invoke_or_reboot_rake_task' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/actionpack-3.2.0/lib/sprockets/assets.rake:25:in `block (2 levels) in <top (required)>' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:205:in `call' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:205:in `block in execute' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:200:in `each' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:200:in `execute' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain' 
/Users/Kyle/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:151:in `invoke_with_call_chain' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/task.rb:144:in `invoke' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/application.rb:112:in `invoke_task' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/application.rb:90:in `block (2 levels) in top_level' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/application.rb:90:in `each' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/application.rb:90:in `block in top_level' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/application.rb:129:in `standard_exception_handling' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/application.rb:84:in `top_level' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/application.rb:62:in `block in run' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/application.rb:129:in `standard_exception_handling' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/lib/rake/application.rb:59:in `run' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/gems/rake-0.9.2/bin/rake:32:in `<top (required)>' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/bin/rake:19:in `load' 
/Users/Kyle/.rvm/gems/ruby-1.9.2-p290@skateparks/bin/rake:19:in `<main>' 
Tasks: TOP => assets:precompile 

Answer 1

rake assets:precompile初始化默认情况下，你的应用程序，其中包括连接到数据库。

里面config/application.rb你可以添加这个，但是看一下下面的链接警告：

config.assets.initialize_on_precompile = false 

Rails Guide on Precompiling Assets

Answer 2

如果它是有道理的在您的情况，您可以选择针对其环境assets:precompile应该工作，使用以下命令：

rake assets:precompile:all RAILS_ENV=development RAILS_GROUPS=assets 

这对我的部署有意义，因为通常：

1. 我做耙我的开发机器上产生的资产（因为我的VPS的内存以某种方式限制）
2. 我拉链都与公众产生的资产应用程序/资产
3. 我传递的zip到VPS答解压缩包有

希望它能帮助。

Answer 3

我有同样的问题。更新链轮3版本，每当我试图在本地（开发）预编译的资产，但是使用生产环境的设置后，我有这个错误：由于

rake aborted! Gem::LoadError: Specified 'postgresql' for database adapter, but the gem is not loaded. Add宝石“PG” to your Gemfile (and ensure its version is at the minimum required by ActiveRecord).

我本地（开发）我使用MySQL和服务器（生产），我使用的Postgres。

标记为已解决的答案不适用于我，因为config.assets.initialize_on_precompile在Rails 4.2.1中不可用。

要解决，我也跟着3个简单步骤：

1. 在你的Gemfile，添加：gem "activerecord-nulldb-adapter"

2. 在database.yml，更改适配器如下：

   production:

   adapter: <%= ENV['DB_ADAPTER'] ||= 'postgresql' %> 
   

3. 要编译生产资产LOCA LLY。在你的终端上运行：DB_ADAPTER=nulldb RAILS_ENV=production rake assets:precompile

此解决方案解决了我，我sawyed here。