组织动态按更新时间排序

app/controllers/organizations_controller.rb

@@ -105,9 +105,9 @@ class OrganizationsController < ApplicationController
         end
         # 最新动态, 来自我关联的项目和课程
         if @organization.org_subfields.where(:field_type => "Compact", :hide => 0).count > 0
-          @acts = UserActivity.find_by_sql("SELECT * FROM `user_activities` where act_type in ('HomeworkCommon', 'News', 'Message', 'Issue') and
+          @acts = UserActivity.find_by_sql("SELECT * FROM `user_activities` where act_type in ('HomeworkCommon', 'News', 'Message', 'Issue', 'JournalsForMessage') and
                                         ((container_type = 'Course' and container_id in (#{course_ids.join(',')})) or (container_type = 'Project' and container_id in (#{project_ids.join(',')})))
-                                        order by created_at desc limit 6;")
+                                        order by updated_at desc limit 6;")
         end
         render :layout => 'base_org_custom'
       else

app/helpers/organizations_helper.rb

@@ -66,52 +66,52 @@ module OrganizationsHelper
   def org_user_by_type obj
     case obj.act_type
       when "Message"
-        user = obj.act.author
+        obj.act.author
       when "News"
-        user = obj.act.author
+        obj.act.author
       when "HomeworkCommon"
-        user = obj.act.user
+        obj.act.user
       when "Issue"
-        user = obj.act.author
+        obj.act.author
     end
   end
 
   def org_title_by_type obj
     case obj.act_type
       when "Message"
-        user = obj.act.parent_id.nil? ? obj.act.subject : obj.act.parent.subject
+        obj.act.parent_id.nil? ? obj.act.subject : obj.act.parent.subject
       when "News"
-        user = obj.act.title
+        obj.act.title
       when "HomeworkCommon"
-        user = obj.act.name
+        obj.act.name
       when "Issue"
-        user = obj.act.subject
+        obj.act.subject
     end
   end
 
   def org_content_by_type obj
     case obj.act_type
       when "Message"
-        user = obj.act.parent_id.nil? ? obj.act.content : obj.act.parent.content
+        obj.act.parent_id.nil? ? obj.act.content : obj.act.parent.content
       when "News"
-        user = obj.act.description
+        obj.act.description
       when "HomeworkCommon"
-        user = obj.act.description
+        obj.act.description
       when "Issue"
-        user = obj.act.description
+        obj.act.description
     end
   end
 
   def org_time_by_type obj
     case obj.act_type
       when "Message"
-        time = obj.act.updated_on
+        obj.act.updated_on
       when "News"
-        user = obj.act.created_on
+        obj.act.created_on
       when "HomeworkCommon"
-        user = obj.act.updated_at
+        obj.act.updated_at
       when "Issue"
-        user = obj.act.updated_on
+        obj.act.updated_on
     end
   end