Rails3载波未上传

问题描述

我尝试了本教程：http://railscasts.com/episodes/253-carrierwave-file-uploads?autoplay=true。 我无法使它正常工作。我的文件未上传，但可以看到数据已发送到控制器。

class PublicationsController < ApplicationController
  respond_to :html,:js,:json,:xml
  def create
    @publication = Publication.create(params[:publication])
    ...
  end
end

更新：

<form novalidate=\"novalidate\" method=\"post\" id=\"new_publication\" enctype=\"multipart/form-data\" class=\"simple_form publication\" action=\"/sl/publications\" accept-charset=\"UTF-8\"><div style=\"margin:0;padding:0;display:inline\"><input type=\"hidden\" value=\"✓\" name=\"utf8\"><input type=\"hidden\" value=\"vny2UjREsnQLZkUjH3zNxC8Cz5tvG/sAcllyjzZ+PWo=\" name=\"authenticity_token\"></div>
          <div class=\"inputs\">
            <div class=\"input string required\"><label for=\"publication_full_name\" class=\"string required\"><abbr title=\"obvezno\">*</abbr> Name</label><input type=\"text\" size=\"50\" required=\"required\" name=\"publication[full_name]\" maxlength=\"255\" id=\"publication_full_name\" class=\"string required\"></div>
            <div class=\"input string email required\"><label for=\"publication_email\" class=\"email required\"><abbr title=\"obvezno\">*</abbr>Mail</label><input type=\"email\" size=\"50\" required=\"required\" name=\"publication[email]\" maxlength=\"255\" id=\"publication_email\" class=\"string email required\"></div>
            <div class=\"input string required\"><label for=\"publication_subject\" class=\"string required\"><abbr title=\"obvezno\">*</abbr>Subject</label><input type=\"text\" size=\"50\" required=\"required\" name=\"publication[subject]\" maxlength=\"255\" id=\"publication_subject\" class=\"string required\"></div>
            <div class=\"input text required\"><label for=\"publication_text\" class=\"text required\"><abbr title=\"obvezno\">*</abbr>Text</label><textarea rows=\"20\" required=\"required\" name=\"publication[text]\" id=\"publication_text\" cols=\"40\" class=\"text required\"></textarea><span class=\"hint\">You can uncomment the line below if you need to overwrite.</span></div>
            <div class=\"input file required\"><label for=\"publication_attachment\" class=\"file required\"><abbr title=\"obvezno\">*</abbr> Attachment</label><input type=\"file\" required=\"required\" name=\"publication[attachment]\" id=\"publication_attachment\" class=\"file required\"></div>
          </div>
          <div class=\"buttons\">
            <input type=\"submit\" value=\"Create Publication\" name=\"commit\" id=\"publication_submit\" class=\"button\">
          </div>
        </form>

我可以看到参数是这样传递给控制器​​的：

Started POST \"/en/publications\" for 127.0.0.1 at Thu May 26 16:17:25 +0200 2011
  Processing by PublicationsController#create as HTML
  Parameters: {\"commit\"=>\"Create Publication\",\"authenticity_token\"=>\"vny2UjREsnQLZkUjH3zNxC8Cz5tvG/sAcllyjzZ+PWo=\",\"utf8\"=>\"\\342\\234\\223\",\"publication\"=>{\"attachment\"=>#<Actiondispatch::Http::UploadedFile:0x106d660a8 @headers=\"Content-disposition: form-data; name=\\\"publication[attachment]\\\"; filename=\\\"photo.jpg\\\"\\r\\nContent-Type: image/jpeg\\r\\n\",@content_type=\"image/jpeg\",@original_filename=\"photo.jpg\",@tempfile=#<File:/var/folders/yX/yXe3dRdgGO8II-+SWIzLRE+++TI/-Tmp-/RackMultipart20110526-35653-1sr4hnw-0>>,\"text\"=>\"asd\",\"subject\"=>\"asd\",\"full_name\"=>\"asd\",\"email\"=>\"[e-mail]\"},\"locale\"=>\"en\"}

模型：

class Publication < ActiveRecord::Base
  mount_uploader :attachment,PublicationUploader

  validates :subject,:presence => true
  validates :text,:presence => true
  validates :full_name,:presence => true
  validates :email,:presence => true,:email => { :if => \'email.present?\' }
  # validates :attachment,#           :integrity => true,#           :processing => true
end

上传器类（默认）：

class PublicationUploader < CarrierWave::Uploader::Base

  # Include RMagick or ImageScience support:
  # include CarrierWave::RMagick
  # include CarrierWave::ImageScience

  # Choose what kind of storage to use for this uploader:
  storage :file
  # storage :s3

  # Override the directory where uploaded files will be stored.
  # This is a sensible default for uploaders that are meant to be mounted:
  def store_dir
    \"uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}\"
  end

  # Provide a default URL as a default if there hasn\'t been a file uploaded:
  # def default_url
  #   \"/images/fallback/\" + [version_name,\"default.png\"].compact.join(\'_\')
  # end

  # Process files as they are uploaded:
  # process :scale => [200,300]
  #
  # def scale(width,height)
  #   # do something
  # end

  # Create different versions of your uploaded files:
  # version :thumb do
  #   process :scale => [50,50]
  # end

  # Add a white list of extensions which are allowed to be uploaded.
  # For images you might use something like this:
  def extension_white_list
    %w(jpg jpeg gif png pdf doc txt)
  end

  # Override the filename of the uploaded files:
  # def filename
  #   \"something.jpg\" if original_filename
  # end

end

宝石文件

source \'http://rubygems.org\'

gem \'rails\',\'3.0.7\'
gem \"hirb\"
gem \"haml\"
gem \"compass\"
gem \"asset_tags\"
gem \"js_erb\"
gem \"jammit\"
gem \'cat_router\',\'>=0.2.0\'
gem \'devise\'
gem \'i18n_routing\'
gem \'simple_form\',\'>=1.4\'
gem \'carmen\'
gem \'carrierwave\',\'>=0.5.4\'

group :development,:test do
  gem \'sqlite3\'
  gem \'capistrano\'
  gem \"win32-open3\",:platforms => :mswin
  gem \'seed-fu\'
end
group :staging,:production do
  gem \'MysqL\'
end

救命？     

解决方法

Rails控制台中的以下代码返回什么：

Publication.create!(:attachment => File.new(\"test.jpg\"))

是否创建出版物并存储附件？当然，您必须在rails文件夹中有\“ test.jpg \”文件。     ,在

PublicationUploader

模型中添加

include CarrierWave::RMagick

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