fix update history

app/controllers/jobs_controller.rb

@@ -5,7 +5,8 @@ class JobsController < ApplicationController
 
 
   def detail
   def detail
     @job = Job.find(params[:id])
     @job = Job.find(params[:id])
-    History.new(user: current_user, job: @job).save if History.where(user: current_user, job: @job).blank?
+    @history = History.find_or_create_by(user: current_user, job: @job)
+    @history.touch(:updated_at)
   end
   end
 
 
   def apply
   def apply