左侧导航栏的视频数调整

app/models/course.rb

@@ -162,7 +162,7 @@ class Course < ApplicationRecord
 
   def videos_count
     course_videos.where(video_id: videos.where("transcoded = 1 or videos.user_id = #{User.current.id}").pluck(:id))
-      .or(course_videos.where(course_videos: {is_link: true}))
+      .or(course_videos.where(course_videos: {is_link: true})).size
   end
 
   def teacher_group(user_id)