Merge remote-tracking branch 'origin/dev_aliyun' into dev_aliyun

app/models/course.rb

@@ -413,7 +413,7 @@ class Course < ApplicationRecord
     when 'exercise'        then '试卷'
     when 'poll'            then '问卷'
     when 'attachment'      then '资源'
-    when 'video'           then '视频'
+    when 'video'           then '视频直播'
     when 'board'           then '讨论'
     when 'course_group'    then '分班'
     when 'statistics'      then '统计'

db/migrate/20200211034807_migrate_video_nam.rb

@@ -0,0 +1,5 @@
+class MigrateVideoNam < ActiveRecord::Migration[5.2]
+  def change
+    CourseModule.where(module_type: "video").update_all(module_name: "视频直播")
+  end
+end