获取"actionmailer"的未定义方法"name":安装Webistrano时的字符串

Question

当我尝试在Webistrano上运行RAKE时,我收到以下错误:

undefined method `name' for "actionmailer":String`

我不熟练使用Ruby和RoR,但之前我已经安装了许多应用程序,但我找不到问题所在.

我正在运行的命令是:

RAILS_ENV=production rake db:migrate --trace

产生以下内容:

我真的想知道诊断和解决这个问题的最佳方法以及将来会出现这样的问题.

(in /srv/www/webistrano)
WARNING: 'require 'rake/rdoctask'' is deprecated.  Please use 'require 'rdoc/task' (in RDoc 2.4.2+)' instead.
at /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/rdoctask.rb
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
rake aborted!
undefined method `name' for "actionmailer":String
/srv/www/webistrano/vendor/rails/railties/lib/rails/gem_dependency.rb:268:in `=='
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:217:in `==='
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:217:in `block in matching_specs'
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:411:in `block in each'
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:410:in `each'
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:410:in `each'
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:216:in `find_all'
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:216:in `matching_specs'
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:238:in `to_specs'
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:256:in `to_spec'
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:1231:in `gem'
/srv/www/webistrano/vendor/rails/railties/lib/rails/gem_dependency.rb:73:in `add_load_paths'
/srv/www/webistrano/vendor/rails/railties/lib/initializer.rb:301:in `block in add_gem_load_paths'
/srv/www/webistrano/vendor/rails/railties/lib/initializer.rb:301:in `each'
/srv/www/webistrano/vendor/rails/railties/lib/initializer.rb:301:in `add_gem_load_paths'
/srv/www/webistrano/vendor/rails/railties/lib/initializer.rb:132:in `process'
/srv/www/webistrano/vendor/rails/railties/lib/initializer.rb:113:in `run'
/srv/www/webistrano/config/environment.rb:16:in `<top (required)>'
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
/srv/www/webistrano/vendor/rails/activesupport/lib/active_support/dependencies.rb:156:in `block in require'
/srv/www/webistrano/vendor/rails/activesupport/lib/active_support/dependencies.rb:521:in `new_constants_in'
/srv/www/webistrano/vendor/rails/activesupport/lib/active_support/dependencies.rb:156:in `require'
/srv/www/webistrano/vendor/rails/railties/lib/tasks/misc.rake:4:in `block in <top (required)>'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `block in execute'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain'
/usr/local/lib/ruby/1.9.1/monitor.rb:190:in `mon_synchronize'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:176:in `block in invoke_prerequisites'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:174:in `each'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:174:in `invoke_prerequisites'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:157:in `block in invoke_with_call_chain'
/usr/local/lib/ruby/1.9.1/monitor.rb:190:in `mon_synchronize'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:116:in `invoke_task'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block (2 levels) in top_level'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `each'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block in top_level'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:88:in `top_level'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:66:in `block in run'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:133:in     `standard_exception_handling'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/bin/rake:33:in `<top (required)>'
/usr/local/bin/rake:23:in `load'
/usr/local/bin/rake:23:in `<main>'
Tasks: TOP => db:migrate => environment

当我运行ruby -v时,我得到以下内容:

ruby 1.9.1p376 (2009-12-07 revision 26041) [i686-linux]

Answer 1

我有这个问题.解决方案是将rubygems降级到您支持的版本.

我需要1.3.5版本(用于rails 2.3.5)

所以你需要这样做:

gem install ruby​​gems-update -v 1.3.5

update_rubygems --version = 1.3.5

而现在耙应该工作.