用户课程动态按更新时间倒序排列

app/services/courses_service.rb

@@ -405,6 +405,7 @@ class CoursesService
         result << {:course_name => course.name,:course_id => course.id,:course_img_url => url_to_avatar(course),:type => latest_course_dynamic[:type],:update_time => latest_course_dynamic[:time],:message => latest_course_dynamic[:message],:count => nil}
       end
     end
+    result.sort!{|order,newer| newer[:update_time] <=> order[:update_time]}
     result
   end