Ruby on rails ActionMailer方法缺失“；默认的“url”设置；

当我在开发模式下运行rails应用程序时，它运行良好。但是，当我在生产模式下运行它时，它在启动时崩溃，我从服务器获得以下输出：

/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action_mailer/base.rb:437:in `method_missing': undefined method `default_url_setting=' for ActionMailer::Base:Class (NoMethodError)
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action_mailer/railtie.rb:34:in `block (3 levels) in <class:Railtie>'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action_mailer/railtie.rb:34:in `each'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action_mailer/railtie.rb:34:in `block (2 levels) in <class:Railtie>'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/lazy_load_hooks.rb:36:in `instance_eval'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/lazy_load_hooks.rb:43:in `block in run_load_hooks'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/lazy_load_hooks.rb:42:in `each'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/lazy_load_hooks.rb:42:in `run_load_hooks'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action_mailer/base.rb:733:in `<class:Base>'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action_mailer/base.rb:325:in `<module:ActionMailer>'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action_mailer/base.rb:10:in `<top (required)>'
from /Users/user/Desktop/MetaRepo/MetaWebsite/app/mailers/notification_mailer.rb:1:in `<top (required)>'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `require'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `block in require'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:236:in `load_dependency'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `require'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:359:in `require_or_load'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:313:in `depend_on'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:225:in `require_dependency'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/engine.rb:439:in `block (2 levels) in eager_load!'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/engine.rb:438:in `each'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/engine.rb:438:in `block in eager_load!'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/engine.rb:436:in `each'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/engine.rb:436:in `eager_load!'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/application/finisher.rb:53:in `block in <module:Finisher>'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/initializable.rb:30:in `instance_exec'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/initializable.rb:30:in `run'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/initializable.rb:55:in `block in run_initializers'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/initializable.rb:54:in `each'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/initializable.rb:54:in `run_initializers'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/application.rb:136:in `initialize!'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /Users/user/Desktop/MetaRepo/MetaWebsite/config/environment.rb:5:in `<top (required)>'
from /Users/user/Desktop/MetaRepo/MetaWebsite/config.ru:4:in `require'
from /Users/user/Desktop/MetaRepo/MetaWebsite/config.ru:4:in `block in <main>'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/builder.rb:51:in `instance_eval'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/builder.rb:51:in `initialize'
from /Users/user/Desktop/MetaRepo/MetaWebsite/config.ru:1:in `new'
from /Users/user/Desktop/MetaRepo/MetaWebsite/config.ru:1:in `<main>'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/builder.rb:40:in `eval'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/builder.rb:40:in `parse_file'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/server.rb:200:in `app'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/commands/server.rb:46:in `app'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/server.rb:301:in `wrapped_app'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/server.rb:252:in `start'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/commands/server.rb:70:in `start'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/commands.rb:55:in `block in <top (required)>'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/commands.rb:50:in `tap'
from /Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/commands.rb:50:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'

/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action\u mailer/base.rb:437:in`method\u missing'：actionmailer:：base:Class（NoMethodError）的未定义方法`default\u url\u setting='
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action\u mailer/railtie.rb:34:in'block（3层）in'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action\u mailer/railtie.rb:34:in'each'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action\u mailer/railtie.rb:34:in'block（2层）in'
来自/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active\u support/lazy\u load\u hooks.rb:36:in'instance\u eval'
来自/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active\u-support/lazy\u-load\u-hooks.rb:36:in'execute\u-hook'
来自/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active\u support/lazy\u load\u hooks.rb:43:“运行中的块加载\u hooks”
来自/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active\u-support/lazy\u-load\u-hooks.rb:42:in'each'
来自/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active\u-support/lazy\u-load\u-hooks.rb:42:in'run\u-load\u-hooks'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action\u mailer/base.rb:733:in`'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action\u mailer/base.rb:325:in`'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.3/lib/action\u mailer/base.rb:10:in`'
from/Users/user/Desktop/MetaRepo/MetaWebsite/app/mailers/notification_mailer.rb:1:in`'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active\u support/dependencies.rb:251:in'require'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active\u support/dependencies.rb:251:“请求中的块”中
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active\u support/dependencies.rb:236:in'load\u dependency'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active\u support/dependencies.rb:251:in'require'
来自/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active\u support/dependencies.rb:359:in“require\u或\u load”
来自/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active\u support/dependencies.rb:313:in'dependent\u'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/activesupport-3.2.3/lib/active\u support/dependencies.rb:225:in“require\u dependencity”
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/engine.rb:439:in`block（2层）in eager_load！'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/engine.rb:438:in'each'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/engine.rb:438:in'block in eager_load！'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/engine.rb:436:in'each'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/engine.rb:436:in'eager_load！'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/application/finisher.rb:53:in'block in'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/initializable.rb:30:in'instance_exec'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/initializable.rb:30:in'run'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/initializable.rb:55:“运行中的块初始化器”
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/initializable.rb:54:in'each'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/initializable.rb:54:in'run_initializers'
来自/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/application.rb:136:in'initialize！'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/railtie/configurable.rb:30:in'method_missing'
from/Users/user/Desktop/MetaRepo/MetaWebsite/config/environment.rb:5:in`'
from/Users/user/Desktop/MetaRepo/MetaWebsite/config.ru:4:in'require'
from/Users/user/Desktop/MetaRepo/MetaWebsite/config.ru:4:in'block in'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/builder.rb:51:in'instance_eval'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/builder.rb:51:在“初始化”中
from/Users/user/Desktop/MetaRepo/MetaWebsite/config.ru:1:in'new'
from/Users/user/Desktop/MetaRepo/MetaWebsite/config.ru:1:in`'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/builder.rb:40:in'eval'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/builder.rb:40:in“parse_文件”
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/server.rb:200:in'app'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/commands/server.rb:46:in'app'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/server.rb:301:in'wrapped_app'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/server.rb:252:in'start'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/commands/server.rb:70:in'start'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/commands.rb:55:in'block in'
from/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/commands.rb:50:in'tap'
来自/Users/user/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.3/lib/rails/commands.rb:50:in`'
来自脚本/rails:6:in'require'
来自脚本/rails:6:in`'

很明显，这与我的ActionMailer宝石有关，但我完全被难住了。非常感谢您的帮助

在（ctrl+F“default\u url”）上，有

default\u url\u选项

。也许你把方法弄错了

 config.action_mailer.default_url_options = { :host => "example.com" }

ctrl+F“默认url”，请参见

默认url\u选项

。也许你把方法弄错了？嗯，是的，谢谢。所以