ruby - 载波+ Mongoid + gridfs + Padrino管理镜像上传

我试图让carrierwave+mongoid+gridfs通过padrino admin上传图像，然后在前端显示把所有东西都粘在一起有人能帮忙吗？
在https://blog.engineyard.com/2011/a-gentle-introduction-to-carrierwave/和https://github.com/carrierwaveuploader/carrierwave-mongoid之后。
尝试通过图像上载保存“Artwork”返回：
nomethoderror，地址为/admin/artworks/update/53a0eedcf2c796106600002
文件的未定义方法“bson_dump”：
hash.rb位置：bson_转储行中的块：15

mongofiles -d database list

返回空。
问题是：目前代码有什么问题？
上传程序：https://github.com/bcsantos/debug/blob/master/lib/uploader.rb

class Uploader < CarrierWave::Uploader::Base

  ##
  # Image manipulator library:
  #
  include CarrierWave::RMagick
  # include CarrierWave::ImageScience
  # include CarrierWave::MiniMagick

  ##
  # Storage type
  #
  storage :grid_fs
  # configure do |config|
  #   config.fog_credentials = {
  #     :provider              => 'XXX',
  #     :aws_access_key_id     => 'YOUR_ACCESS_KEY',
  #     :aws_secret_access_key => 'YOUR_SECRET_KEY'
  #   }
  #   config.fog_directory = 'YOUR_BUCKET'
  # end
  # storage :fog

resize_to_limit(1024, 768)

  ## Manually set root
  def root; File.join(Padrino.root,"public/"); end

  ##
  # Directory where uploaded files will be stored (default is /public/uploads)
  #
  def store_dir
    'content'
  end

  ##
  # Directory where uploaded temp files will be stored (default is [root]/tmp)
  #
  def cache_dir
    Padrino.root("tmp")
  end

  ##
  # 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 :resize_to_fit => [740, 580]

  ##
  # Create different versions of your uploaded files
  #
  # version :header do
  #   process :resize_to_fill => [940, 250]
  #   version :thumb do
  #     process :resize_to_fill => [230, 85]
  #   end
  # end
  ##
  # White list of extensions which are allowed to be uploaded:
  #
  def extension_white_list
    %w(jpg jpeg gif png)
  end

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

—————---
上传https://github.com/bcsantos/debug/blob/master/app/models/upload.rb

class Upload
  include Mongoid::Document
  include Mongoid::Timestamps # adds created_at and updated_at fields

  # field <name>, :type => <type>, :default => <value>
  field :file, :type => String
  field :created_at, :type => Time

  attr_accessible :upload

  mount_uploader :upload, Uploader


  # You can define indexes on documents using the index macro:
  # index :field <, :unique => true>

  # You can create a composite key in mongoid to replace the default id using the key macro:
  # key :field <, :another_field, :one_more ....>
end

—————---
我想将上传/图片与https://github.com/bcsantos/debug/blob/master/app/models/artwork.rb关联的模型

class Artwork
  include Mongoid::Document
  include Mongoid::Timestamps # adds created_at and updated_at fields

  # field <name>, :type => <type>, :default => <value>
  field :name, :type => String
  field :year, :type => Integer
  field :author, :type => String
  field :rent_price, :type => String
  field :sale_price, :type => String
  field :medium, :type => String
  field :size, :type => String
  field :colour, :type => String

  field :picture, :type => Upload
  field :thumbnail, :type => Upload


  # You can define indexes on documents using the index macro:
  # index :field <, :unique => true>

  # You can create a composite key in mongoid to replace the default id using the key macro:
  # key :field <, :another_field, :one_more ....>
end

—————---
从数据库中检索文件的控制器（感谢@darío）

TourApart::App.controllers do

  get :gridfs, map: '/content/*' do
    gridfs_file = Mongoid::GridFS[params[:splat]]
    content_type gridfs_file.content_type
    gridfs_file.data
  end

  error Mongoid::Errors::MongoidError do
    halt 404, 'File not found'
  end

end

最佳答案

首先，考虑到这个模型设计，您的艺术模型没有正确地嵌入Upload文档。它应该像这样嵌入picture和thumbnail字段：

class Artwork
  # ...
  embeds_one :picture, class_name: "Upload"
  embeds_one :thumbnail, class_name: "Upload"
  # ...
end

另外，我不明白为什么你一开始就有一个Upload文档。考虑到你的设计，似乎没有必要。Uploader包含您试图存储在Upload模型中的所有信息。例如，您的Artwork模型可以改为如下所示（您可以将Upload模型全部转储在一起）：

class Artwork
  # ...
  mount_uploader :picture, Uploader
  mount_uploader :thumbnail, Uploader
  # ...
end

您的picture和thumbnail字段将包含更新日期、文件名、文件日期等内容。
而且，看起来您正在尝试手动管理thumbnail。我认为缩略图是picture的较小版本。Carrierwave也能帮你处理：

class Artwork
  # ...
  mount_uploader :picture, Uploader
  # ...
end

然后在您的Uploader中添加类似的内容：

class Uploader < CarrierWave::Uploader::Base
  # ...
  version :thumbnail do
    process resize_to_fill: [160, 120]
  end
  # ...
end

这样，对于两个不同的版本，您将拥有一个Artwork#picture和一个Artwork#picture_thumbnail访问器。
更多示例：
Artwork#picture.read-获取图像数据
Artwork#picture.file-获取图像文件
Artwork#picture_thumbnail.file-获取缩略图版本的文件
Artwork#picture.file.content_type-是的，内容类型
等
最后，如果您使用的是carrierwave mongoid，则无需直接在控制器中访问Mongoid::GridFS查找图片并访问picture字段。让gridf呆在幕后。
另外，我建议使用CarrierWave::MiniMagick而不是CarrierWave::RMagick。从长远来看，这只会让事情变得更容易，imo，但它要求您在机器上安装imagemagick。

关于ruby - 载波+ Mongoid + gridfs + Padrino管理镜像上传，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/24203977/