ruby-on-rails - Rails中的Carrierwave未加载默认URL

我在载波上传器中设置默认图像时遇到问题。似乎是在URL的前面附加了一个奇怪的类，但未呈现图像。请参阅下面的代码。

帮手

 # encoding: utf-8

class UserpicUploader < CarrierWave::Uploader::Base

  CarrierWave::SanitizedFile.sanitize_regexp = /[^[:word:]\.\-\+]/
  # Include RMagick or MiniMagick support:
  include CarrierWave::RMagick
  # include CarrierWave::MiniMagick
  # Include the Sprokets 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

  # 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



  # Process files as they are uploaded:

  version :normal do
   process :resize_to_fill => [162, 163]
  end
  # 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/" + [normal, "profile_default_pic.png"].compact.join('_'))
       "/images/fallback/" + [normal, "profile_default_pic.png"].compact.join('_')
     end

  #
  # 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
      if original_filename
        @name ||= Digest::MD5.hexdigest(File.dirname(current_path))
        "#{@name}.#{file.extension}"
      end
    end

end

编辑...

这是有效的已编辑代码。我不得不将图像放在public / fallback而不是Assets / images / fallback。

# encoding: utf-8

class UserpicUploader < CarrierWave::Uploader::Base

  CarrierWave::SanitizedFile.sanitize_regexp = /[^[:word:]\.\-\+]/
  # Include RMagick or MiniMagick support:
  include CarrierWave::RMagick
  # include CarrierWave::MiniMagick
  # Include the Sprokets 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

  # 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



  # Process files as they are uploaded:

  version :normal do
   process :resize_to_fill => [162, 163]
  end
  # 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/" + [normal, "profile_default_pic.png"].compact.join('_'))
       # "/fallback/" + [normal, "profile_default_pic.png"].compact.join('_')
     end

  #
  # 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
      if original_filename
        @name ||= Digest::MD5.hexdigest(File.dirname(current_path))
        "#{@name}.#{file.extension}"
      end
    end

end

最佳答案

好的，我知道了，这就是我所缺少的...


默认文件夹必须位于public /文件夹中，而不能位于资产/图像中
我必须在上载器类中添加以下几行：

包括Sprockets :: Helpers :: RailsHelper

包括链轮:: Helpers :: IsolatedHelper
我必须将default_url更改为以下内容：

asset_path（“ fallback /” + [normal，“ profile_default_pic.png”]。compact.join（'_'））