缺陷状态更新后，按天发送邮件通知

app/models/mailer.rb

@@ -104,7 +104,7 @@ class Mailer < ActionMailer::Base
 
     # 查询user的缺陷，项目中成员都能收到
     sql = "select DISTINCT * from members m, issues i where i.project_id = m.project_id and m.user_id='#{user.id}'
-     and (i.created_on between '#{date_from}' and '#{date_to}') order by i.created_on desc"
+     and (i.updated_on between '#{date_from}' and '#{date_to}') order by i.updated_on desc"
     @issues = Issue.find_by_sql(sql)
 
     # @bids 查询课程作业，包括老师发布的作业，以及user提交作业