Rails 5.2 Active Storage清除/删除附件
所以我使用Active Storage上传附加到Collection模型的多个图像。 除非我试图从集合中清除/删除单个附件，否则一切都很顺利。
问题：出于某种原因，每当我加载集合的显示页面时，我的所有图像都会立即被清除/删除。 当然，我只想在点击链接时删除文件。 有谁知道如何解决这个问题？
我的collections展示视图：
我已经阅读了http://edgeguides.rubyonrails.org/active_storage_overview.html#removing-files上的文档（参见第4段）
但遗憾的是，这并未提供有关如何专门使用purge或purge_later方法的任何信息。
编辑目前将我的代码更改为此（仍然遗憾地无效）：
在我的collections_controller.rb中有这个
def delete_image_attachment @image = ActiveStorage::Blob.find_signed(params[:id]) @image.purge redirect_to root_path end
在我尝试删除附加图像后，这给了我这个错误：
服务器日志：
Started DELETE "/collections/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBYdz09IiwiZXhwIjpudWxsLCJwdXIiOiJibG9iX2lkIn19--3e75276d414b4c2040e02cf0afbc083e2337faa0/delete_image_attachment" for ::1 at 2018-03-29 19:06:55 +0200 Processing by CollectionsController#delete_image_attachment as HTML Parameters: {"authenticity_token"=>"60zIkeknxRYp/sJIWNwF+BrEftYHSCQvak34h8FkadPXgVPQSXN/sCoxI/6FU+jZbqQitES81fyqkmIx6XYp6w==", "id"=>"eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBYdz09IiwiZXhwIjpudWxsLCJwdXIiOiJibG9iX2lkIn19--3e75276d414b4c2040e02cf0afbc083e2337faa0"} ActiveStorage::Blob Load (0.1ms) SELECT "active_storage_blobs".* FROM "active_storage_blobs" WHERE "active_storage_blobs"."id" = $1 LIMIT $2 [["id", 90], ["LIMIT", 1]] ↳ app/controllers/collections_controller.rb:69 Disk Storage (0.1ms) Deleted file from key: 8wpzqPQcWYjK2rVEejcU88FB Disk Storage (0.0ms) Deleted files by key prefix: variants/8wpzqPQcWYjK2rVEejcU88FB/ (0.0ms) BEGIN ↳ app/controllers/collections_controller.rb:70 ActiveStorage::Blob Destroy (0.2ms) DELETE FROM "active_storage_blobs" WHERE "active_storage_blobs"."id" = $1 [["id", 90]] ↳ app/controllers/collections_controller.rb:70 (2.0ms) COMMIT ↳ app/controllers/collections_controller.rb:70 ActiveStorage::Attachment Load (0.2ms) SELECT "active_storage_attachments".* FROM "active_storage_attachments" WHERE "active_storage_attachments"."record_id" = $1 AND "active_storage_attachments"."record_type" = $2 AND "active_storage_attachments"."name" = $3 LIMIT $4 [["record_id", 90], ["record_type", "ActiveStorage::Blob"], ["name", "preview_image"], ["LIMIT", 1]] ↳ app/controllers/collections_controller.rb:70 Redirected to http://localhost:3000/ Completed 302 Found in 5ms (ActiveRecord: 2.5ms)
rake routes输出：
Prefix Verb URI Pattern Controller#Action root GET / home#index about GET /about(.:format) pages#about contact GET /contact(.:format) pages#contact settings GET /settings(.:format) settings#edit new_setting GET /setting/new(.:format) settings#new edit_setting GET /setting/edit(.:format) settings#edit setting GET /setting(.:format) settings#show PATCH /setting(.:format) settings#update PUT /setting(.:format) settings#update DELETE /setting(.:format) settings#destroy POST /setting(.:format) settings#create delete_image_attachment_collection DELETE /collections/:id/delete_image_attachment(.:format) collections#delete_image_attachment collections GET /collections(.:format) collections#index POST /collections(.:format) collections#create new_collection GET /collections/new(.:format) collections#new edit_collection GET /collections/:id/edit(.:format) collections#edit collection GET /collections/:id(.:format) collections#show PATCH /collections/:id(.:format) collections#update PUT /collections/:id(.:format) collections#update DELETE /collections/:id(.:format) collections#destroy rails_service_blob GET /rails/active_storage/blobs/:signed_id/*filename(.:format) active_storage/blobs#show rails_blob_representation GET /rails/active_storage/representations/:signed_blob_id/:variation_key/*filename(.:format) active_storage/representations#show rails_disk_service GET /rails/active_storage/disk/:encoded_key/*filename(.:format) active_storage/disk#show update_rails_disk_service PUT /rails/active_storage/disk/:encoded_token(.:format) active_storage/disk#update rails_direct_uploads POST /rails/active_storage/direct_uploads(.:format) active_storage/direct_uploads#create
我的routes.rb：
Rails.application.routes.draw do root 'home#index' get 'about', to: 'pages#about', as: :about get 'contact', to: 'pages#contact', as: :contact get 'instellingen', to: 'settings#edit' resource :setting resources :collections do member do delete :delete_image_attachment end end end
您循环遍历图像集合并在每个图像上调用清除方法。 相反，您应该链接到控制器上的destroy方法，如下所示，考虑到您的控制器操作并猜测您的路由名称。
错误是因为图像对象返回其完整路径，并且链接认为您想要指向的内容。 相反，你只需要它的signed_id并希望链接调用具有delete_image_attachment路径的路由。
<%= link_to 'Remove', delete_image_attachment_collections_url(image.signed_id), method: :delete, data: { confirm: 'Are you sure?' } %>
destroy方法看起来像这样……
def delete_image_attachment @image = ActiveStorage::Blob.find_signed(params[:id]) @image.purge redirect_to collections_url end
路线应该是这样的……
resources :collections do member do delete :delete_image_attachment end end
查看rails路由指南 ，了解更多有趣的路由事实。
感谢您关于Blob vs Attachment的更新！ 清除附件后，我将redirect_back改为我来自的forms，如下所示：
def remove_attachment attachment = ActiveStorage::Attachment.find(params[:id]) attachment.purge # or use purge_later redirect_back(fallback_location: collections_path) end
不是重新加载整个页面的最佳解决方案，但有效…
好吧，我有点解决了我的问题，但我真的不明白发生了什么。
每当我点击“删除”按钮时，我都会收到此错误： 
它想要重定向到ID为43的collection_url（而我的集合的ID实际上是6,43可能是图像附件的ID）。
当我手动重新加载相同的收集页面时，图片消失了（所以它有点工作），但这不是理想的。
有人知道我如何改进我的代码，以便我的控制器中的redirect_to指向当前的集合ID而不是Activestorage图像附件ID？
我的文件
查看：collection / show.html.erb：
<% @collection.images.each do |image| %> <%= image_tag(image) %> <%= link_to 'Remove', delete_image_attachment_collection_url(image), method: :delete, data: { confirm: 'Are you sure?' } %> <% end %>
控制器：collections_controller.rb
class CollectionsController < ApplicationController before_action :set_collection, only: [:show, :edit, :update, :destroy] before_action :set_collections # GET /collections # GET /collections.json def index end # GET /collections/1 # GET /collections/1.json def show end # GET /collections/new def new @collection = Collection.new end # GET /collections/1/edit def edit end # POST /collections # POST /collections.json def create @collection = Collection.new(collection_params) respond_to do |format| if @collection.save format.html { redirect_to @collection, notice: 'Fotocollectie is aangemaakt.' } format.json { render :show, status: :created, location: @collection } else format.html { render :new } format.json { render json: @collection.errors, status: :unprocessable_entity } end end # collection = Collection.create!(collection_params) # redirect_to collection end # PATCH/PUT /collections/1 # PATCH/PUT /collections/1.json def update respond_to do |format| if @collection.update(collection_params) format.html { redirect_to @collection, notice: 'Fotocollectie is bijgewerkt.' } format.json { render :show, status: :ok, location: @collection } else format.html { render :edit } format.json { render json: @collection.errors, status: :unprocessable_entity } end end end # DELETE /collections/1 # DELETE /collections/1.json def destroy @collection.destroy respond_to do |format| format.html { redirect_to collections_url, notice: 'Fotocollectie is verwijderd.' } format.json { head :no_content } end end def delete_image_attachment @image = ActiveStorage::Attachment.find(params[:id]) @image.purge redirect_to @current_page end private # Use callbacks to share common setup or constraints between actions. def set_collection @collection = Collection.find(params[:id]) end def set_collections @collections = Collection.all end # Never trust parameters from the scary internet, only allow the white list through. def collection_params params.require(:collection).permit(:title, :order, images: []) end end
型号：collection.rb
class Collection < ApplicationRecord has_many_attached :images end
路线：routes.rb
Rails.application.routes.draw do root 'home#index' get 'about', to: 'pages#about', as: :about get 'contact', to: 'pages#contact', as: :contact get 'settings', to: 'settings#edit' resource :setting resources :collections do member do delete :delete_image_attachment end end end