Make documentable capable to work with local or remote storage system.

app/controllers/concerns/commentable_actions.rb

@@ -115,9 +115,7 @@ module CommentableActions
     def recover_documents_from_cache(resource)
       return false unless resource.try(:documents)
       resource.documents = resource.documents.each do |document|
-        if document.cached_attachment.present?
-          document.attachment = URI.parse(document.cached_attachment)
-        end
+        document.set_attachment_from_cache if document.cached_attachment.present?
       end
     end
 

app/controllers/documents_controller.rb

@@ -45,7 +45,8 @@ class DocumentsController < ApplicationController
   end
 
   def destroy_upload
-    @document = Document.new(attachment: URI.parse(params[:path]))
+    @document = Document.new(cached_attachment: params[:path])
+    @document.set_attachment_from_cache
     @document.documentable = @documentable
 
     if @document.attachment.destroy
@@ -62,7 +63,7 @@ class DocumentsController < ApplicationController
     if @document.valid?
       @document.attachment_file_name = "#{Time.now.to_i} - #{@document.attachment_file_name}"
       @document.attachment.save
-      @document.cached_attachment = URI(request.url) + @document.attachment.url
+      @document.set_cached_attachment_from_attachment(URI(request.url))
     else
       @document.attachment.destroy
     end
@@ -91,7 +92,7 @@ class DocumentsController < ApplicationController
 
   def recover_attachments_from_cache
     if @document.attachment.blank? && @document.cached_attachment.present?
-      @document.attachment = URI.parse(@document.cached_attachment)
+      @document.set_attachment_from_cache
     end
   end
 

app/models/document.rb

@@ -20,6 +20,22 @@ class Document < ActiveRecord::Base
 
   after_save :remove_cached_document, if: -> { valid? && persisted? && cached_attachment.present? }
 
+  def set_cached_attachment_from_attachment(prefix)
+    self.cached_attachment = if Paperclip::Attachment.default_options[:storage] == :filesystem
+                               attachment.path
+                             else
+                               prefix + attachment.url
+                             end
+  end
+
+  def set_attachment_from_cache
+    self.attachment = if Paperclip::Attachment.default_options[:storage] == :filesystem
+                        File.open(cached_attachment)
+                      else
+                        URI.parse(cached_attachment)
+                      end
+  end
+
   private
 
     def validate_attachment_size