Rails/Mailer-发送电子邮件后无方法错误

Question

我对Rails相当陌生，所以这可能会成为显而易见的事情；然而，我刚刚花了一天的大部分时间来解决这个问题。

我有一个rails应用程序，我已经开发了一段时间，但是我今天才开始实现mailers。我在这里学习了Rails ActionMailer教程：http://guides.rubyonrails.org/v3.0.3/action_mailer_basics.html邮件程序在一个新的示例应用程序中运行良好。然而，当我在现有的rails应用程序（在开发环境中运行）中逐字重复这些步骤时，我收到以下错误。它在数据库中创建条目，正确地发送两个纯文本

我看到的具体错误后，它发送欢迎电子邮件是：

    Completed 500 Internal Server Error in 280ms

NoMethodError (undefined method `error' for true:TrueClass):
  app/controllers/musers_controller.rb:52:in `block in create'
  app/controllers/musers_controller.rb:50:in `create' 

注意，为了不弄乱现有的用户表，我创建了一个临时脚手架

Started POST "/musers" for 127.0.0.1 at 2013-07-10 20:32:34 -0400
Processing by MusersController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"OuoEmsjkAVBHZwqPO5b/O4eKw6iZBaLP6vUT6f9WCOI=", "muser"=>{"name"=>"New User", "email"=>"[e-mail]"}, "commit"=>"Create"}
  User Load (0.2ms)  SELECT "users".* FROM "users" WHERE "users"."id" = 1 LIMIT 1
  User Load (0.3ms)  SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1  [["id", 1]]
   (0.1ms)  begin transaction
  SQL (0.6ms)  INSERT INTO "musers" ("created_at", "email", "name", "updated_at") VALUES (?, ?, ?, ?)  [["created_at", Thu, 11 Jul 2013 00:32:34 UTC +00:00], ["email", "[e-mail]"], ["name", "New User"], ["updated_at", Thu, 11 Jul 2013 00:32:34 UTC +00:00]]
   (1.7ms)  commit transaction
  Rendered muser_mailer/registration_confirmation.html.erb (0.1ms)
  Rendered muser_mailer/registration_confirmation.text.erb (0.0ms)
Completed 500 Internal Server Error in 280ms

NoMethodError (undefined method `error' for true:TrueClass):
  app/controllers/musers_controller.rb:52:in `block in create'
  app/controllers/musers_controller.rb:50:in `create'


  Rendered /usr/local/rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.8/lib/action_dispatch/middleware/templates/rescues/_trace.erb (2.6ms)
  Rendered /usr/local/rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.8/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (2.5ms)
  Rendered /usr/local/rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.8/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (15.3ms)

--我应该注意第50行

# POST /musers
  # POST /musers.json
  def create
    @muser = Muser.new(params[:muser])

respond_to do |format|
  if @muser.save
    MuserMailer.registration_confirmation(@muser).deliver
    format.html { redirect_to @muser, notice: 'Muser was successfully created.' }
    format.json { render json: @muser, status: :created, location: @muser }
  else
    format.html { render action: "new" }
    format.json { render json: @muser.errors, status: :unprocessable_entity }
  end
end
  end

class MuserMailer < ActionMailer::Base
   default from: "[e-mail]"

  def registration_confirmation(muser)
    @muser = muser
    mail(:to => muser.email, :subject => "Registered")
  end
end

我认为问题不在于我的smtp、邮件设置或变量，因为它确实会添加到数据库中

由于没有更好的术语，感觉问题在于Rails在发送电子邮件后想要如何路由；好像我需要在我的邮件操作的末尾放一个返回或指定一个路由，告诉服务器返回到控制器操作。换句话说，我迷路了！

下面是我使用的两个邮件视图文件。

<h3><%= @muser.name %>! You sweet sweet fool!</h3>
<p>Thank you for registering!</p>

Thank you for registering!

这是我给缪斯的模型：

class Muser < ActiveRecord::Base
  attr_accessible :email, :name

end

Answer 1

我解决了这个问题-在我的配置/环境/development.rb文件中有错误的行config.action_mailer.logger=true导致了这些问题。一旦删除一切工作完美。