Rails PaperClip電子郵件附件不起作用

Question

我正在嘗試通過電子郵件發送PaperClip附件。 我已經閱讀了StackExchange上的幾篇文章，但仍然無法使它正常工作。 對於某些嘗試，我會獲得undefined method' ，而其他嘗試undefined method'我帶到登錄屏幕。

評論模型：

  has_one :attachment

我嘗試過的郵件程序代碼：

attachments[comment.attachment.attach_file_name] = File.read(comment.attachment.to_file.path)

attachments[comment.attachment.attach_file_name] = File.read(comment.attachment.path)

attachments[comment.attachment.attach_file_name] = File.read(attachment_path(comment.attachment))

這是瀏覽器控制台的副本-我嘗試了幾件事：

>> comment.attachment.attach_file_name
=> "2013-09-10_09-32-32.png"
>> comment.attachment.path
!! #<NoMethodError: undefined method `path' for #  <Attachment:0x007f8d06903450>>
>> attachment_path(comment.attachment)
=> "/attachments/75"
>> File.read(attachment_path(comment.attachment))
!! #<Errno::ENOENT: No such file or directory - /attachments/75>
>> File.read(attachment_path(comment.attachment).to_file)
!! #<NoMethodError: undefined method `to_file' for  "/attachments/75":String>
>> File.read(comment.attachment.path)
!! #<NoMethodError: undefined method `path' for # <Attachment:0x007f8d06903450>>
>> File.read(comment.attachment.to_file.path)
!! #<NoMethodError: undefined method `to_file' for # <Attachment:0x007f8d06903450>>
>>

因此，此代碼：

attachment_path(comment.attachment)

返回此：

"/attachments/75"

UDPATE

我嘗試了這個：

attachments[comment.attachment.attach_file_name] = File.read(comment.attachment.attach_url)

有undefined method attach_url

因此，請在控制台中嘗試以下操作：

>> comment.attachment.attach_url
!! #<NoMethodError: undefined method `attach_url' for # <Attachment:0x007f8d1c9b3cb8>>
>> attachment_path(comment.attachment)
=> "/attachments/76"
>> attachment_path(comment.attachment).attach_url
!! #<NoMethodError: undefined method `attach_url' for "/attachments/76":String>
>> attach_url(comment.attachment)
!! #<NoMethodError: undefined method `attach_url' for #<CommentMailer:0x007f8d145664d8>>
>> attach_url_path(comment.attachment)
!! #<NoMethodError: undefined method `attach_url_path' for # <CommentMailer:0x007f8d145664d8>>
>> attachment(comment.attachment)
!! #<NoMethodError: undefined method `attachment' for # <CommentMailer:0x007f8d145664d8>>
>>

Answer 1

這段代碼在Comment和Attachment模型之間建立了一對一的關系：

has_one :attachment

這與回形針無關。

我假設在您的Attachment模型中，您可以按照以下方式進行操作：

has_attached_file :attach

您需要與附加到Attachment模型的:attach交互：

@comment.attachment.attach

當您嘗試將其附加到您的電子郵件時，您應該使用如下格式：

attachments[comment.attachment.attach_file_name] = File.read(comment.attachment.attach.path)