无法让 Rails 3 ActionMailer 接受附件

Question

我正在将Rails 2.3.14应用程序迁移到Rails 3.0。在它中，一个邮递员发送一条带有附件的信息。使用下面的代码，这在2.3.x.中没有问题

def notification(material, recipient, path_to_file)  
  enctype = "base64"
  @recipients  = recipient.email
  @from        = material.person.email
  @reply_to    = material.person.email
  @subject     = "New or updated materials: " + material.name
  @sent_on     = Time.now
  @content_type = "multipart/mixed"
  @headers['sender'] = material.person.email
  part    :content_type => "text/plain", 
          :body => render_message('notification', 
          :material => material, 
          :url =>  material.full_url_to_material)
  attachment  :content_type => "application" + "/" + material.file_type, 
              :body => File.read(path_to_file), 
              :filename => File.basename(material.file),
              :transfer_encoding => enctype, 
              :charset => "utf-8" if !!material.send_as_attachment
end

通过阅读Rails 3.0 ActionMailer指令，我将该方法修改为：

  def notification(material, recipient, path_to_file)
    @material = material
    @url = material.full_url_to_material
    attachments[material.file_file_name] = File.open(path_to_file, 'rb'){|f| f.read} if material.send_as_attachment?
    headers['sender'] = material.person.email
    mail(:to => recipient.email,
         :subject => "New or updated materials: " + material.name,
         :reply_to => material.person.email, 
         :from =>  material.person.email)
  end

创建材质时会调用MaterialMailer#通知。我有以下规格来测试这个：

  it "will include the materials as an attachement with the the send_as_attachment field is set to 1" do
    it = Material.create(@materials_hash.merge(:send_notification => "1", :send_as_attachment => "1"))
    email =  ActionMailer::Base.deliveries[0] 
    email.body.should =~ Regexp.new("Name of the posted material: " + it.name )
    email.has_attachments?.should be_true
  end

正如我提到的，这在2.3中运行良好。现在，如果我将send_as_attachment标志设置为1，我会得到以下错误，引用email.body.sshould行：

  1) Material will include the materials as an attachement with the the send_as_attachment field is set to 1
     Failure/Error: email.body.should =~ Regexp.new("Name of the posted material: " + it.name )
       expected: /Name of the posted material: My material/
            got:  (using =~)
       Diff:
       @@ -1,2 +1 @@
       -/Name of the posted material: My material/

如果我更改规范并将send_as_attachment设置为0，则会出现以下错误，引用has_attachments？行：

1） 材质将包含作为附件的材质，send_as_attachment字段设置为1失败/错误：电子邮件。是否有附件？。应该是true预期错误为真

因此，包含附件在某种程度上破坏了电子邮件。

我尝试过其他方法来附着材料：

  attachments[material.file_file_name] =  {:mime_type => "application" + "/" + material.file_content_type, 
              :content => File.read(material.file.path),  
              :charset => "utf-8"}

我已尝试将文件路径硬编码为已知文件。但运气不好。

还有其他地方我应该找吗？

Answer 1

根据Christopher的建议，以下是我用来让它工作的邮件和规范代码：

  def notification(material, recipient, path_to_file)
    @material = material
    @url = material.full_url_to_material
    attachments[material.file_file_name] = File.open(material.file.path, 'rb'){|f| f.read} if material.send_as_attachment?
    headers['sender'] = material.person.email
    mail(:to => recipient.email,
         :subject => message_subject("New or updated materials: " + material.name),
         :reply_to => material.person.email, 
         :from =>  material.person.email)
  end
  it "will include the materials as an attachment with the the send_as_attachment field is set to 1" do
    it = Material.create(@materials_hash.merge(:send_notification => "1", :send_as_attachment => "1"))
    Delayed::Worker.new(:quiet => true).work_off
    email =  ActionMailer::Base.deliveries[0] 
    email.parts.each.select{ |email| email.body =~ Regexp.new("Name of the posted material: " + it.name )}.should_not be_empty
    email.has_attachments?.should be_true
  end

在规范中，我必须检查电子邮件每个部分的正文，因为附件是第一部分还是第二部分并不一致。