Rails 5.2（升级） - Active Storage不显示图像

所以我从rails 5.1升级到5.2

rails app:update

一切正常，我立即设置了活动存储配置，以便与Web应用程序中的新部分一起使用 .

我创建了迁移：

rails active_storage:install
rake db:migrate

我使用AWS S3配置了conf / storage.yml - production：

test：service：磁盘根目录：<％= Rails.root.join（“tmp / storage”）％>

local：service：磁盘根目录：<％= Rails.root.join（“storage”）％>

amazon：service：S3 access_key_id：<％= Rails.application.credentials.dig（：aws，：access_key_id）％> secret_access_key：<％= Rails.application.credentials.dig（：aws，：secret_access_key）％> region：eu -west-2斗：无论如何

将所需的GEM添加到GEMFILE：

gem 'aws-sdk-s3'

确保Dev环境使用本地设置：

config.active_storage.service = :local

将所有必需的行添加到模型中：

class Article < ApplicationRecord
  has_one_attached :main_picture
  ... 
end

我做了一些花哨的东西，比如验证，自定义变体等等 - 但是出于测试目的并让基础知识正常工作，我评论了所有这些东西 .

更新控制器以使用Pundit中指定的允许属性：

调节器

@article.update(permitted_attributes(@article))

权威人士

class ArticlePolicy < ApplicationPolicy

  ...

  def permitted_attributes
    if !user.nil? && user.admin
      [:title, :content, :teaser, :slug, :published, :user_id, :main_picture]
    end
  end

  ...
end

现在上传工作变得轻而易举 - 到我的本地环境，我甚至测试过将它上传到AWS，但让我们坚持本地环境 . 我可以在以下位置找到本地环境的最新上传内容：

/storage/N1/Ay/N1AyNaBeMNGhhmPSR69XwA9a

这是我尝试在视图中显示图像时的URL：

http://localhost:3000/rails/active_storage/blobs/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBQQT09IiwiZXhwIjpudWxsLCJwdXIiOiJibG9iX2lkIn19--fd200a456532a80dfb122b2bdd9a53181b2a62aa/428KB.jpg

在active_storage_blob表中看起来像这样：

id,key,filename,content_type,metadata,byte_size,checksum,created_at
"55","N1AyNaBeMNGhhmPSR69XwA9a","428KB.jpg","image/jpeg","{""identified"":true,""width"":1920,""height"":1080,""analyzed"":true}","428299","48c8G3xQj5ENGgqqM08seQ==","2018-07-24 15:21:11"

以下是我尝试显示图像的各种方法：

= image_tag @article.main_picture
= image_tag url_for(@article.main_picture)
= image_tag @article.main_picture.variant(resize_to_fit: [100, 100]

这些选项都不会显示已成功上载并存储在数据库中的图像 . 我得到的只是图像占位符 .

为了最新的工作（但没有），我将以下内容添加到GEMFILE中（根据guide）：

gem 'image_processing', '~> 1.2'

有一个similar threat抱怨这个 - 使用Rails 5.1并在Gemfile中添加active_storage - 但没有真正的答案 . 正如建议我尝试添加：

配置/ application.rb中

require 'active_storage/engine'

没有帮助显示图像:(

---更新：访问URL时请求的日志---

Started GET "/rails/active_storage/blobs/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBQQT09IiwiZXhwIjpudWxsLCJwdXIiOiJibG9iX2lkIn19--fd200a456532a80dfb122b2bdd9a53181b2a62aa/428KB.jpg" for 127.0.0.1 at 2018-07-25 12:41:36 +0100
Processing by ActiveStorage::BlobsController#show as JPEG
  Parameters: {"signed_id"=>"eyjfcmfpbhmionsibwvzc2fnzsi6ikjbahbqqt09iiwizxhwijpudwxslcjwdxiioijibg9ix2lkin19--fd200a456532a80dfb122b2bdd9a53181b2a62aa", "filename"=>"428kb"}
** [Localeapp] 1532518896 - Handling translation updates
** [Localeapp] 1532518896 - polling
** [Localeapp] API CALL: get https://api.localeapp.com/v1/projects/qXa7rByH1jQ9cNrU8t46zQkk8rkq3fMka13EACmQkXZ5FFTuUn/translations.yml?updated_at=1532518849
** [Localeapp] ATTEMPT 1
** [Localeapp] RESPONSE: 200
** [Localeapp] CALLING SUCCESS HANDLER: handle_success
** [Localeapp] 1532518897 - poll success
** [Localeapp] 1532518897 - reloading I18n
Filter chain halted as :set_blob rendered or redirected
Completed 404 Not Found in 917ms (ActiveRecord: 0.0ms)


Started GET "/rails/active_storage/blobs/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBQQT09IiwiZXhwIjpudWxsLCJwdXIiOiJibG9iX2lkIn19--fd200a456532a80dfb122b2bdd9a53181b2a62aa/428KB.jpg?disposition=attachment" for 127.0.0.1 at 2018-07-25 12:41:39 +0100
Processing by ActiveStorage::BlobsController#show as JPEG
  Parameters: {"disposition"=>"attachment", "signed_id"=>"eyjfcmfpbhmionsibwvzc2fnzsi6ikjbahbqqt09iiwizxhwijpudwxslcjwdxiioijibg9ix2lkin19--fd200a456532a80dfb122b2bdd9a53181b2a62aa", "filename"=>"428kb"}
** [Localeapp] 1532518899 - Handling translation updates
** [Localeapp] 1532518899 - polling
** [Localeapp] API CALL: get https://api.localeapp.com/v1/projects/qXa7rByH1jQ9cNrU8t46zQkk8rkq3fMka13EACmQkXZ5FFTuUn/translations.yml?updated_at=1532518897
** [Localeapp] ATTEMPT 1
** [Localeapp] RESPONSE: 200
** [Localeapp] CALLING SUCCESS HANDLER: handle_success
** [Localeapp] 1532518900 - poll success
** [Localeapp] 1532518900 - reloading I18n
Filter chain halted as :set_blob rendered or redirected
Completed 404 Not Found in 837ms (ActiveRecord: 0.0ms)

注意：

我添加了一个图像下载按钮来生成日志：

= link_to "Download", rails_blob_path(@article.main_picture, disposition: "attachment")