视频详情添加分班

app/controllers/course_videos_controller.rb

@@ -26,6 +26,12 @@ class CourseVideosController < ApplicationController
 
     @watch_course_videos = course_video.watch_course_videos.includes(:user, :watch_video_histories).where("end_at IS NOT NULL")
     @count = @watch_course_videos.count
+
+    if params[:group_id].present?
+      @watch_course_videos = @watch_course_videos.joins("
+        JOIN course_members ON course_members.user_id = watch_course_videos.user_id AND course_members.course_id = #{@course.id}
+      ").where("course_members.course_group_id = ?", params[:group_id])
+    end
     @watch_course_videos = paginate @watch_course_videos
   end