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Resourcen:

• New ActionMailer API in Rails 3.0
• mail
• mail RDoc
• Full episode source code

Quellcode:

rails mailit
cd mailit
rails g scaffold user name:string email:string
rake db:migrate
rails g mailer user_mailer
bundle install

# config/initializers/setup_mail.rb
ActionMailer::Base.smtp_settings = {
  :address              => "smtp.gmail.com",
  :port                 => 587,
  :domain               => "railscasts.com",
  :user_name            => "railscasts",
  :password             => "secret",
  :authentication       => "plain",
  :enable_starttls_auto => true
}

ActionMailer::Base.default_url_options[:host] = "localhost:3000"
Mail.register_interceptor(DevelopmentMailInterceptor) if Rails.env.development?

# app/mailers/user_mailer.rb
class UserMailer < ActionMailer::Base
  default :from => "ryan@railscasts.com"

  def registration_confirmation(user)
    @user = user
    attachments["rails.png"] = File.read("#{Rails.root}/public/images/rails.png")
    mail(:to => "#{user.name} <#{user.email}>", :subject => "Registered")
  end
end

# users_controller.rb
UserMailer.registration_confirmation(@user).deliver

# Gemfile
gem "mail", "2.1.3"

# lib/development_mail_interceptor.rb
class DevelopmentMailInterceptor
  def self.delivering_email(message)
    message.subject = "#{message.to} #{message.subject}"
    message.to = "ryan@railscasts.com"
  end
end

<!-- views/user_mailer/registration_confirmation.text.erb -->
<%= @user.name %>,

Thank you for registering!

Edit profile: <%= edit_user_url(@user) %>

<!-- views/user_mailer/registration_confirmation.html.erb -->
<p><%= @user.name %>,</p>

<p>Thank you for registering!</p>

<p><%= link_to "Edit profile", edit_user_url(@user) %></p>