Rails + Mongoid + Carrierwave + Cloudinary答案

【问题标题】：Rails + Mongoid + Carrierwave + CloudinaryRails + Mongoid + Carrierwave + Cloudinary
【发布时间】：2015-10-22 08:06:28
【问题描述】：

我正在从 Uploadcare 迁移到 Cloudinary。

但是当我尝试更新文件字段时，该字段设置为“old”

p = Photo _id: 556d225e69702d45b0000000, created_at: 2015-06-02 03:26:22 UTC, updated_at: 2015-06-02 03:26:22 UTC, file: nil
p.file = p.id
p.save

Photo _id: 556d225e69702d45b0000000, created_at: 2015-06-02 03:26:22 UTC, updated_at: 2015-07-30 19:41:12 UTC, file: "_old_"


p.file = <PhotoUploader:0x007fe96fc86800 @model=#<Photo _id: 556d225e69702d45b0000000, created_at: 2015-06-02 03:26:22 UTC, updated_at: 2015-07-30 19:41:12 UTC, file: "_old_">, @mounted_as=:file, @stored_public_id=nil, @stored_version=nil, @file=nil, @original_filename=nil, @public_id=nil, @storage=#<Cloudinary::CarrierWave::Storage:0x007fe9701f8f18 @uploader=#<PhotoUploader:0x007fe96fc86800 ...>>>

有什么建议吗？

【问题讨论】：

标签： ruby-on-rails carrierwave cloudinary uploadcare

【解决方案1】：

如果你保存模型时没有给上传者字段赋值，然后再赋值，CarrierWave 会临时将set the field 到_old_ 强制Mongoid 存储字段。一旦模型被持久化，就会分配正确的值：

001 > p = Photo.new title: 'Out with the old!'
 => #<Photo _id: 55c76e895d8b01bef0000000, title: "Out with the old!", image: nil, clean: nil>
002 > p.save
 => true
003 > p
 => #<Photo _id: 55c76e895d8b01bef0000000, title: "Out with the old!", image: nil, clean: nil>
004 > p.image = File.open( 'giraffe-small.jpg')
 => #<File:giraffe-small.jpg>
005 > p
 => #<Photo _id: 55c76e895d8b01bef0000000, title: "Out with the old!", image: "_old_", clean: nil>
006 > p.save
 => true
007 > p
 => #<Photo _id: 55c76e895d8b01bef0000000, title: "Out with the old!", image: "image/upload/v1439133413/dyirrctc3ls3ficre7hj.jpg", clean: nil>

请注意，Cloudinary 上传器接受图像标识符或文件对象（见下文）。

型号

class Photo
  include Mongoid::Document
  field :title, type: String
  mount_uploader :image, ImageUploader
end

上传者

class ImageUploader < CarrierWave::Uploader::Base
  include Cloudinary::CarrierWave
end

存储对已上传到您的 Cloudinary 帐户的图像的引用

如果您的图片网址是http://res.cloudinary.com/tocker/image/upload/v1435050504/sample.jpg*

p = Photo.new
p.title = "Existing image"
signature = Cloudinary::Utils.api_sign_request({:public_id=>"sample", :version=>"1435050504"}, Cloudinary.config.api_secret)
p.image = "image/upload/v1435050504/sample#{signature}"
p.save

*图片地址在你的Cloudinary media library.

上传本地图片文件并存储参考

p = Photo.new
p.title = "Uploaded local image"
p.image = File.open( path_to_local_image_file)
p.save

【讨论】：

【解决方案2】：

我发现了问题！

Carrierwave 不允许你更改上传栏如果之前没有上传图片。

所以...您必须先上传示例图片

p = Photo.find(:id)
p.remote_file_url = "http:sample.com/image.png"
p.save

然后...将您的 photo_uploader.rb 更改为 Cloudinary 选项

include Cloudinary::CarrierWave

最后……

p.file = 'cloudinary public id'
p.save

还有 GOTCHA！

【讨论】：