我要将rails应用程序部署到数字海洋。
我按照本教程进行了此 https://gorails.com/deploy/ubuntu/14.04
然后我在本地命令提示符上运行命令以进行部署。
# cap production deploy
运行命令后，我收到以下错误。
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/capistrano-3.1.0/lib/capistrano/i18n.rb:4: warning: duplicated key at line 6 ignored: :starting
** Invoke production (first_time)
** Execute production
** Invoke load:defaults (first_time)
** Execute load:defaults
** Invoke bundler:map_bins (first_time)
** Execute bundler:map_bins
** Invoke deploy:set_rails_env (first_time)
** Execute deploy:set_rails_env
** Invoke deploy:set_linked_dirs (first_time)
** Execute deploy:set_linked_dirs
** Invoke deploy:set_rails_env
** Invoke deploy (first_time)
** Execute deploy
** Invoke deploy:starting (first_time)
** Execute deploy:starting
** Invoke deploy:check (first_time)
** Execute deploy:check
** Invoke git:check (first_time)
** Invoke git:wrapper (first_time)
** Execute git:wrapper
cap aborted!
NoMethodError: undefined method `on' for main:Object
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/capistrano-3.1.0/lib/capistrano/tasks/git.rake:16:in `block (2 levels) in <top (required)>'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:248:in `call'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:248:in `block in execute'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:243:in `each'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:243:in `execute'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:187:in `block in invoke_with_call_chain'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/2.2.0/monitor.rb:211:in `mon_synchronize'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:180:in `invoke_with_call_chain'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:209:in `block in invoke_prerequisites'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:207:in `each'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:207:in `invoke_prerequisites'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:186:in `block in invoke_with_call_chain'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/2.2.0/monitor.rb:211:in `mon_synchronize'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:180:in `invoke_with_call_chain'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:173:in `invoke'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/capistrano-3.1.0/lib/capistrano/dsl.rb:14:in `invoke'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/capistrano-3.1.0/lib/capistrano/tasks/deploy.rake:34:in `block (2 levels) in <top (required)>'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:248:in `call'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:248:in `block in execute'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:243:in `each'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:243:in `execute'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:187:in `block in invoke_with_call_chain'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/2.2.0/monitor.rb:211:in `mon_synchronize'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:180:in `invoke_with_call_chain'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:173:in `invoke'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/capistrano-3.1.0/lib/capistrano/dsl.rb:14:in `invoke'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/capistrano-3.1.0/lib/capistrano/tasks/deploy.rake:4:in `block (2 levels) in <top (required)>'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:248:in `call'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:248:in `block in execute'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:243:in `each'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:243:in `execute'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:187:in `block in invoke_with_call_chain'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/2.2.0/monitor.rb:211:in `mon_synchronize'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:180:in `invoke_with_call_chain'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:173:in `invoke'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/capistrano-3.1.0/lib/capistrano/dsl.rb:14:in `invoke'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/capistrano-3.1.0/lib/capistrano/tasks/framework.rake:65:in `block (2 levels) in <top (required)>'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/capistrano-3.1.0/lib/capistrano/tasks/framework.rake:64:in `each'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/capistrano-3.1.0/lib/capistrano/tasks/framework.rake:64:in `block in <top (required)>'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:248:in `call'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:248:in `block in execute'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:243:in `each'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:243:in `execute'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:187:in `block in invoke_with_call_chain'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/2.2.0/monitor.rb:211:in `mon_synchronize'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:180:in `invoke_with_call_chain'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/task.rb:173:in `invoke'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/application.rb:150:in `invoke_task'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/application.rb:106:in `block (2 levels) in top_level'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/application.rb:106:in `each'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/application.rb:106:in `block in top_level'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/application.rb:115:in `run_with_threads'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/application.rb:100:in `top_level'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/application.rb:78:in `block in run'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/application.rb:176:in `standard_exception_handling'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rake-11.1.1/lib/rake/application.rb:75:in `run'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/capistrano-3.1.0/lib/capistrano/application.rb:15:in `run'
/Users/llvc/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/capistrano-3.1.0/bin/cap:3:in `<top (required)>'
/Users/llvc/.rbenv/versions/2.2.3/bin/cap:23:in `load'
/Users/llvc/.rbenv/versions/2.2.3/bin/cap:23:in `<main>'
Tasks: TOP => git:check => git:wrapper
The deploy has failed with an error: #<NoMethodError: undefined method `on' for main:Object>
** Invoke deploy:failed (first_time)
** Execute deploy:failed
我从stackoverflow中发现了类似的问题。NoMethodError： main：Object
的未定义方法 'on'但是解决方案对我无济于事。我需要专家的额外帮助。谢谢。晉語
更改：
gem 'capistrano', '~> 3.1.0'
gem 'capistrano-bundler', '~> 1.1.2'
gem 'capistrano-rails', '~> 1.1.1'
自：
gem 'capistrano', '~>3.5.0'
gem 'capistrano-bundler', '~> 1.1.3'
gem 'capistrano-rails', '~> 1.1.7'
如果在/config/deploy.rb 中有：
lock '3.1.0'
更改为：
lock '3.5.0'
并运行：
bundle update
bundle install
我可以在
按照以下步骤解决此问题。
1.. 确保您正确遵循了教程。
2.. 删除 gemfile 中的 capestrano 相关版本