pdf的预览添加disposition

app/controllers/attachments_controller.rb

@@ -17,8 +17,11 @@ class AttachmentsController < ApplicationController
     end
 
     pdf_attachment = params[:disposition] || "attachment"
-    send_file(absolute_path(local_path(@file)), filename: @file.filename,disposition: pdf_attachment, type: @file.content_type.presence || 'application/octet-stream')
-
+    if pdf_attachment == "inline"
+      render pdf: absolute_path(local_path(@file)), filename: @file.filename, disposition: 'inline', type: @file.content_type.presence || 'application/octet-stream'
+    else
+      send_file(absolute_path(local_path(@file)), filename: @file.filename,stream:false, type: @file.content_type.presence || 'application/octet-stream')
+    end
     update_downloads(@file)
   end