课堂增加视频模块

app/models/course.rb

@@ -206,7 +206,7 @@ class Course < ApplicationRecord
   end
 
   def all_course_module_types
-    %w[activity announcement online_learning shixun_homework common_homework group_homework exercise attachment course_group graduation poll board statistics]
+    %w[activity announcement online_learning shixun_homework common_homework group_homework exercise attachment course_group graduation poll board statistics video]
   end
 
   def get_course_module_by_type(type)
@@ -406,6 +406,7 @@ class Course < ApplicationRecord
     when 'exercise'        then '试卷'
     when 'poll'            then '问卷'
     when 'attachment'      then '资源'
+    when 'video'           then '视频'
     when 'board'           then '讨论'
     when 'course_group'    then '分班'
     when 'statistics'      then '统计'
@@ -425,9 +426,10 @@ class Course < ApplicationRecord
     when 'exercise'        then 8
     when 'poll'            then 9
     when 'attachment'      then 10
-    when 'board'           then 11
+    when 'video'           then 11
-    when 'course_group'    then 12
+    when 'board'           then 12
-    when 'statistics'      then 13
+    when 'course_group'    then 13
+    when 'statistics'      then 14
     else 100
     end
   end

db/migrate/20200207090252_add_video_to_course_module.rb

@@ -0,0 +1,12 @@
+class AddVideoToCourseModule < ActiveRecord::Migration[5.2]
+  def change
+    Course.all.each do |course|
+      unless course.course_modules.exists?(module_type: "video")
+        atta_position = course.course_modules.find_by(module_type: 'attachment')&.position.to_i
+        video_position = atta_position != 0 ? (atta_position + 1) : 11
+        course.course_modules.where("position >= #{video_position}").update_all("position = position + 1")
+        course.course_modules << CourseModule.new(module_type: "video", hidden: 1, module_name: "视频", position: video_position)
+      end
+    end
+  end
+end