Merge branch 'dev_aliyun' of https://bdgit.educoder.net/Hjqreturn/educoder into dev_aliyun

db/migrate/20190823023738_change_exericse_1936_scores.rb

@@ -3,7 +3,7 @@ class ChangeExericse1936Scores < ActiveRecord::Migration[5.2]
     #1936的试卷成绩有问题。
     # #https://www.educoder.net/courses/2935/exercises/1936/users/pizfnr5ts
     ex_special = Exercise.find_by_id(1936)
-    ex_special_users = ex_special.exercise_users.exercise_user_committed.where("end_at is not null and end_at > ?",Time.now - 2.months)
+    ex_special_users = ex_special&.exercise_users&.exercise_user_committed&.where("end_at is not null and end_at > ?",Time.now - 2.months)
     if ex_special.present? && ex_special_users.exists?
       ex_special_users.each do |ex_user|
         calculate_score = calculate_student_score(ex_special,ex_user.user)[:total_score]

db/migrate/20190823024643_modify_course_introduction_for_boards.rb

@@ -0,0 +1,42 @@
+class ModifyCourseIntroductionForBoards < ActiveRecord::Migration[5.2]
+  def change
+    platform = PlatformSample.where(:samples_type => "courseGuide").first
+    content = '大家好！
+
+欢迎进入在线课堂！
+
+该课堂对应于一个或多个线下班级，课堂成员可以利用老师发布的邀请码申请加入。
+
+在这里，老师和教辅将结合教学内容，把不同类型的实训项目发布给大家，让大家在真实的实战环境中得到锻炼。
+
+那么什么是实训项目呢？大家有空自己尝试一下就知道了：
+
+- Python实训：[Python程序设计入门](https://www.educoder.net/paths/13)   |  [大学计算机基础——基于Python](https://www.educoder.net/paths/11)
+
+- Java实训：[Java语言程序设计（基础篇）](https://www.educoder.net/paths/38)
+
+- C/C++实训：[C/C++程序设计](https://www.educoder.net/paths/3)  |  [数据结构与算法（C语言）](https://www.educoder.net/paths/4)
+
+- Matlab实训：[智取MATLAB：基本语法](https://www.educoder.net/shixuns/7bvs54gw/challenges)  |  [控制结构](https://www.educoder.net/shixuns/q4fowkfa/challenges)  |  [矩阵进阶](https://www.educoder.net/shixuns/grunzcs3/challenges)
+
+- HTML/CSS实训：[HTML5+CSS3网页制作（基础篇）](https://www.educoder.net/paths/15)
+
+- 云计算实训：[Docker企业级实训（基础篇）](https://www.educoder.net/paths/29)
+
+... ... 等等
+
+你们现在就可以去体验哦！
+
+欢迎提出宝贵建议，平台一定会给您带来更多惊喜！
+
+
+支持团队'
+    platform.update_column(:contents, content)
+    messages = Message.where(subject: "新课导语")
+    messages.find_each do |m|
+      m.update_column(:is_md, true)
+      message_detail = m.message_detail
+      message_detail.update_column(:content, content) if message_detail
+    end
+  end
+end

public/stylesheets/css/edu-common.css

@@ -95,6 +95,10 @@ a:hover.link-color-grey03{color:#3498db!important;}
 
 
 /*通用文字大小样式*/
+.font-8{ font-size: 8px!important;}
+.font-9{ font-size: 9px!important;}
+.font-10{ font-size: 10px!important;}
+.font-11{ font-size: 11px!important;}
 .font-12{ font-size: 12px!important;}
 .font-13{ font-size: 13px!important;}
 .font-14{ font-size: 14px!important;}