ruby-on-rails – Rails 3.2.1中ActionMailer中未定义的方法’de

=> Booting WEBrick
=> Rails 3.2.1 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
Exiting
/Users/vinayshenoy/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.1/lib/action_mailer/base.rb:437:in `method_missing': undefined method `default_content_type=' for ActionMailer::Base:Class (NoMethodError)
from /Users/vinayshenoy/flo-server/config/environment.rb:7:in `<top (required)>'
from /Users/vinayshenoy/flo-server/config.ru:4:in `require'
from /Users/vinayshenoy/flo-server/config.ru:4:in `block in <main>'
from /Users/vinayshenoy/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/builder.rb:51:in `instance_eval'
from /Users/vinayshenoy/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/builder.rb:51:in `initialize'
from /Users/vinayshenoy/flo-server/config.ru:1:in `new'
from /Users/vinayshenoy/flo-server/config.ru:1:in `<main>'
from /Users/vinayshenoy/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/builder.rb:40:in `eval'
from /Users/vinayshenoy/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/builder.rb:40:in `parse_file'
from /Users/vinayshenoy/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/server.rb:200:in `app'
from /Users/vinayshenoy/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.1/lib/rails/commands/server.rb:46:in `app'
from /Users/vinayshenoy/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/server.rb:301:in `wrapped_app'
from /Users/vinayshenoy/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.4.1/lib/rack/server.rb:252:in `start'
from /Users/vinayshenoy/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.1/lib/rails/commands/server.rb:70:in `start'
from /Users/vinayshenoy/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.1/lib/rails/commands.rb:55:in `block in <top (required)>'
from /Users/vinayshenoy/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.1/lib/rails/commands.rb:50:in `tap'
from /Users/vinayshenoy/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.1/lib/rails/commands.rb:50:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'

这是我的config / environment.rb文件

# Load the rails application
require File.expand_path('../application',__FILE__)

# Initialize the rails application
FloServer::Application.initialize!

ActionMailer::Base.default_content_type = "text/html"

如果我注释掉ActionMailer :: Base.default_content_type =“text / html”行,那么服务器可以正常运行.但没有它,我就无法发送电子邮件.

我昨天将它添加到config / environments / development.rb文件中

config.action_mailer.delivery_method = :smtp
config.action_mailer.smtp_settings = {
:address              => "smtp.gmail.com",:port                 => 587,:user_name            => 'username',:password             => 'password',:authentication       => 'plain',:enable_starttls_auto => true  }

我尝试重新启动Mac,运行“捆绑更新”并重新安装rails而没有任何结果.

我在Ruby 1.9.3上使用Rails 3.2.1.请帮忙.