ruby-on-rails - railscarrierwave_direct 无法呈现 direct_upload_form_for 表单

Question

我尝试在我的 rails 3.2 应用程序中为某些图像上传设置carrierwave_direct，但似乎无法通过使用 direct_upload_form_for 标签呈现表单。

加载包含表单的页面时，我收到错误“#< PostmarkerImage:0x007fdbe07b39f0 > 的未定义方法`direct_fog_url'”。

PostmarkerImage是我已经安装上载像这样的模式:

class PostmarkerImage < ActiveRecord::Base
  attr_accessible :image, :image_cache

  belongs_to :postmarker

  validates :image, :presence => true

  mount_uploader :image, PostmarkerImageUploader
end

图像列是一个字符串，我也保证了迁移已运行到创建列。上传器现在看起来像这样:

class PostmarkerImageUploader < CarrierWave::Uploader::Base
  include CarrierWaveDirect::Uploader

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

  # Include the Sprockets helpers for Rails 3.1+ asset pipeline compatibility:
  include Sprockets::Helpers::RailsHelper
  include Sprockets::Helpers::IsolatedHelper

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

  include CarrierWave::MimeTypes
  process :set_content_type

  # Provide a default URL as a default if there hasn't been a file uploaded:
  # def default_url
  #   # For Rails 3.1+ asset pipeline compatibility:
  #   # asset_path("fallback/" + [version_name, "default.png"].compact.join('_'))
  #
  #   "/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)
  end

  # Override the filename of the uploaded files:
  # Avoid using model.id or version_name here, see uploader/store.rb for details.
  # def filename
  #   "something.jpg" if original_filename
  # end

end

我还确保已经安装了carrierwave_direct、fog、mini_magick 和Imagemagick。我可以知道我还错过了什么吗？似乎上传器的安装没有正确完成。

Answer 1

设法弄明白了:) 以防万一有人遇到这个问题:

我正在实现一个单独的模型来保存我的图像，而不是在现有表中添加一列。所以 direct_upload_form_for 期望 栏目 (例如 Image.new.image)而不是 对象 (例如 Image.new)我正在返回。我想我被 form_for 部分抛弃了，它通常需要一个 对象 !