默认网址不Carrierwave Rails中加载(Default URL not loading

我有问题，我carrierwave上传设置的默认图像。 这似乎是追加一个奇怪的类URL的前面，但不是在渲染图像。 请参阅下面我的代码。

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...

这里是工作的编辑的代码。 我只好把图像中的公共/回退，而不是资产/图像/回退。

# 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

Answer 1:

好吧，我得到它的工作，这是我缺少的是什么？

• 默认文件夹必须是公共/文件夹没有资产/图片

• 我有以下行添加到上传类：

  包括链轮::助手:: RailsHelper

  包括链轮::助手:: IsolatedHelper

• 我不得不把DEFAULT_URL更改为以下内容：

  asset_path（ “回退/” + [正常的“profile_default_pic.png”]。compact.join（ '_'））

Answer 2:

在Rails 4.1。*你可以指定在DEFAULT_URL方法的文件名

def default_url
  "default.png"
end

在这种情况下， 为Default.png应该是在/ app /资产/ images文件夹

Answer 3:

编辑上传类：

def default_url  
 "/images/fallback/" + [version_name,"default.png"].compact.join('_')
end

然后复制在默认的照片/images/fallback/default.png

文章来源: Default URL not loading with Carrierwave in Rails