Rails對於「\\＃PostgreSQL支持未定義的方法`fetch'，支持7.4和8.x版本。」：字符串

Question

當我在生產機器上運行'RAILS_ENV = production bundle exec rake assets：precompile'時，出現此錯誤：

$ RAILS_ENV=production bundle exec rake assets:precompile --trace 
** Invoke assets:precompile (first_time) 
** Execute assets:precompile 
/usr/local/rbenv/versions/2.1.0/bin/ruby /usr/local/rbenv/versions/2.1.0/bin/rake assets:precompile:all RAILS_ENV=production RAILS_GROUPS=assets --trace 
** 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! 
undefined method `fetch' for "\\# PostgreSQL. Versions 7.4 and 8.x are supported.":String 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-3.2.16/lib/active_record/connection_adapters/abstract/connection_specification.rb:35:in `resolve_string_connection' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-3.2.16/lib/active_record/connection_adapters/abstract/connection_specification.rb:25:in `spec' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-3.2.16/lib/active_record/connection_adapters/abstract/connection_specification.rb:130:in `establish_connection' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-3.2.16/lib/active_record/railtie.rb:88:in `block (2 levels) in <class:Railtie>' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-3.2.16/lib/active_support/lazy_load_hooks.rb:36:in `instance_eval' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-3.2.16/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-3.2.16/lib/active_support/lazy_load_hooks.rb:26:in `block in on_load' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-3.2.16/lib/active_support/lazy_load_hooks.rb:25:in `each' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-3.2.16/lib/active_support/lazy_load_hooks.rb:25:in `on_load' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-3.2.16/lib/active_record/railtie.rb:80:in `block in <class:Railtie>' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/railties-3.2.16/lib/rails/initializable.rb:30:in `instance_exec' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/railties-3.2.16/lib/rails/initializable.rb:30:in `run' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/railties-3.2.16/lib/rails/initializable.rb:55:in `block in run_initializers' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/railties-3.2.16/lib/rails/initializable.rb:54:in `each' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/railties-3.2.16/lib/rails/initializable.rb:54:in `run_initializers' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/railties-3.2.16/lib/rails/application.rb:136:in `initialize!' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/railties-3.2.16/lib/rails/railtie/configurable.rb:30:in `method_missing' 
/home/map7/pais/config/environment.rb:6:in `<top (required)>' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-3.2.16/lib/active_support/dependencies.rb:251:in `require' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-3.2.16/lib/active_support/dependencies.rb:251:in `block in require' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-3.2.16/lib/active_support/dependencies.rb:236:in `load_dependency' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-3.2.16/lib/active_support/dependencies.rb:251:in `require' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/railties-3.2.16/lib/rails/application.rb:103:in `require_environment!' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/railties-3.2.16/lib/rails/application.rb:305:in `block (2 levels) in initialize_tasks' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:236:in `call' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:236:in `block in execute' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:231:in `each' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:231:in `execute' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:175:in `block in invoke_with_call_chain' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:168:in `invoke_with_call_chain' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:161:in `invoke' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-3.2.16/lib/sprockets/assets.rake:93:in `block (2 levels) in <top (required)>' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:236:in `call' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:236:in `block in execute' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:231:in `each' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:231:in `execute' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:175:in `block in invoke_with_call_chain' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:168:in `invoke_with_call_chain' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:197:in `block in invoke_prerequisites' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:195:in `each' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:195:in `invoke_prerequisites' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:174:in `block in invoke_with_call_chain' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:168:in `invoke_with_call_chain' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:161:in `invoke' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-3.2.16/lib/sprockets/assets.rake:60:in `block (3 levels) in <top (required)>' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:236:in `call' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:236:in `block in execute' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:231:in `each' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:231:in `execute' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:175:in `block in invoke_with_call_chain' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:168:in `invoke_with_call_chain' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:161:in `invoke' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:149:in `invoke_task' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:106:in `block (2 levels) in top_level' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:106:in `each' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:106:in `block in top_level' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:115:in `run_with_threads' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:100:in `top_level' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:78:in `block in run' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:165:in `standard_exception_handling' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:75:in `run' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/bin/rake:33:in `<top (required)>' 
/usr/local/rbenv/versions/2.1.0/bin/rake:23:in `load' 
/usr/local/rbenv/versions/2.1.0/bin/rake:23:in `<main>' 
Tasks: TOP => environment 
rake aborted! 
Command failed with status (1): [/usr/local/rbenv/versions/2.1.0/bin/ruby /...] 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/file_utils.rb:54:in `block in create_shell_runner' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/file_utils.rb:45:in `call' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/file_utils.rb:45:in `sh' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/file_utils_ext.rb:37:in `sh' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/file_utils.rb:82:in `ruby' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/file_utils_ext.rb:37:in `ruby' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-3.2.16/lib/sprockets/assets.rake:12:in `ruby_rake_task' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-3.2.16/lib/sprockets/assets.rake:21:in `invoke_or_reboot_rake_task' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-3.2.16/lib/sprockets/assets.rake:29:in `block (2 levels) in <top (required)>' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:236:in `call' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:236:in `block in execute' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:231:in `each' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:231:in `execute' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:175:in `block in invoke_with_call_chain' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:168:in `invoke_with_call_chain' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:161:in `invoke' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:149:in `invoke_task' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:106:in `block (2 levels) in top_level' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:106:in `each' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:106:in `block in top_level' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:115:in `run_with_threads' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:100:in `top_level' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:78:in `block in run' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:165:in `standard_exception_handling' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:75:in `run' 
/usr/local/rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.1.1/bin/rake:33:in `<top (required)>' 
/usr/local/rbenv/versions/2.1.0/bin/rake:23:in `load' 
/usr/local/rbenv/versions/2.1.0/bin/rake:23:in `<main>' 
Tasks: TOP => assets:precompile 

我試過更新'pg'寶石。我可以在我的開發&登臺服務器上編譯資產。生產機器正在進行最後的部署（7天前），並且我沒有更改任何與數據庫相關的配置。

Answer 1

"\\# PostgreSQL. Versions 7.4 and 8.x are supported."看起來像一個database.yml文件的第一行。

是不是意外地將\\添加到該行？ #表示正常評論。