pdf在线预览4

app/controllers/exercises_controller.rb

@@ -1290,7 +1290,7 @@ class ExercisesController < ApplicationController
     if params[:export].present? && params[:export]
       normal_status(0,"正在下载中")
     else
-      file = File.open(Rails.root.join('exercise_export/blank_exercise'))
+      file = File.open(Rails.root.join('exercise_export/blank_exercise.html.erb'))
       html = ERB.new(file.read).result(prepare_binding)
 
       kit = PDFKit.new(html)