Rails 5.2 (升级)-活动存储不显示图像
因此，我已经从rails 5.1升级到5.2
rails app:update这一切都运行得很好，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：
测试:服务:磁盘根：<%=存储(“tmp/Rails.root.join”) %>
local: service:磁盘根目录：<%=存储(“Rails.root.join”) %>
amazon:服务: S3 access_key_id：<%= Rails.application.credentials.dig(:aws，:access_key_id) %> secret_access_key：<%= Rails.application.credentials.dig(:aws，:secret_access_key) %>区域: eu-west-2存储桶:随便
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将所有必需的线添加到模型中：
class Article < ApplicationRecord
has_one_attached :main_picture
...
end我做了一些花哨的东西，比如验证，自定义变量等--但是为了测试的目的和获得基本的工作，我注释掉了所有这些东西。
更新控制器以使用在Pundit中指定的允许属性：
控制器
@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现在上传工作就像微风一样-到我的本地环境，我甚至测试了将其上传到AWS，但让我们坚持本地环境。我可以在本地环境中找到最新的上传：
/storage/N1/Ay/N1AyNaBeMNGhhmPSR69XwA9a这是我试图在视图中显示图像时的URL：
http://localhost:3000/rails/active_storage/blobs/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBQQT09IiwiZXhwIjpudWxsLCJwdXIiOiJibG9iX2lkIn19--fd200a456532a80dfb122b2bdd9a53181b2a62aa/428KB.jpg它在active_storage_blob表中如下所示：
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式：
= 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。
为了让最新的版本能够工作(但没有)，我在GEMFILE中添加了以下内容(根据guide)：
gem 'image_processing', '~> 1.2'有一个similar threat抱怨这一点-使用Rails5.1并在Gemfile中添加active_storage -但没有真正的答案。按照建议，我尝试添加以下内容：
config/application.rb
require 'active_storage/engine'没有帮助显示图像:(
- UPDATE: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：
我添加了一个图片下载按钮来生成日志：
= link_to "Download", rails_blob_path(@article.main_picture, disposition: "attachment")回答 1
Stack Overflow用户
发布于 2018-07-25 20:48:55
你的signed_id似乎无效，这就是为什么你得到一个“过滤器链停止，因为:set_blob呈现或重定向”。
添加到响应中：
该问题是由区分大小写的URL引起的。GEM "route_downcaser“已安装。删除这个GEM后，一切都像预期的那样工作。
此外，"route_downcaser“提供了excluded_patterns选项。因此，您可以将GEM与active_storage一起使用，但请确保将以下内容添加到初始化器中：
# config/initializers/route_downcaser.rb
RouteDowncaser.configuration do |config|
config.redirect = true
config.exclude_patterns = [
/assets\//i,
/fonts\//i,
/active_storage\//i
]
end有关更多配置选项，请访问here :)
https://stackoverflow.com/questions/51502588
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