Rails 3.2.1中ActionMailer中未定義的方法'default_content_type ='

我在我的項目中添加了一個系統來重置用戶的密碼，並通過電子郵件發送給他，以防他忘記密碼。昨天工作正常（當我實施它時）。當我今天嘗試啓動服務器時，出現以下錯誤。Rails 3.2.1中ActionMailer中未定義的方法'default_content_type ='

=> 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>'

這是我的config/environment.rb文件中

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

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

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

如果我註釋掉ActionMailer::Base.default_content_type = "text/html"線，服務器工作沒有任何問題。但沒有它，我無法發送電子郵件。

昨天

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 }

我試着重新啓動的Mac我將此添加到配置/環境/ development.rb文件，運行「捆綁更新」，並沒有任何結果重新安裝護欄。

我在Ruby 1.9.3上使用Rails 3.2.1。請幫忙。

來源

2012-03-14 Vinay S Shenoy

DEFAULT_CONTENT_TYPE。當您嘗試發送電子郵件時，您會收到什麼錯誤？另外，您是否有適合您嘗試發送的電子郵件的附加擴展名。（action.format.template） – AMIT 2012-03-14 06:03:10

我在問題中提到昨天整個系統工作正常。直到我將該行添加到environment.rb，它才發送電子郵件。我爲html創建了視圖擴展，但沒有創建文本。 – 2012-03-14 06:07:40

你可以試試不需要

ActionMailer::Base.default :content_type => "text/html"

來源

2012-03-14 05:59:42 MikDiet

它工作！謝謝！出於好奇，任何想法爲什麼早期的路線昨天工作，但不是今天？ – 2012-03-14 06:05:00

@VinaySShenoy：配置選項不讀取，直到服務器重新啓動;你可能已經在昨天運行了，但不得不在今天重新啓動它，這就是當更改的配置被讀取時 – fakeleft 2012-03-26 19:47:01

我也有一些問題，所以我決定在這裏問你，而不是問一個新的問題。我的項目的不同之處在於我在Environment.rb中添加了這個： ** config.action_mailer.delivery_method =：smtp | ：sendmail | ：test ** 我該如何處理？（謝謝你！） – 2014-02-13 18:09:31

Rails 3.2.1中ActionMailer中未定義的方法'default_content_type ='

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