我有一个网站,让人们能够担任职务并发表评论。 我想提出一个新的评论通知制度,这样当他的一个用户记录能够看到对其职位的新评论数目时。
我的想法是增加一个读表,其中我将储存用户_id和评论_id(用户_id读评论)。 但是,如果表率会扩大,这可能会造成一些业绩问题。
如何以最佳方式执行?
实现这一目的的一个途径是节省一个既定的员额和评论日期,以及用户的“最后访问”日期(或“用户点击“我的新职位”链接的最后时间)。
然后,你只需要获得比用户表中更新的日期的所有职位和评论。
如何仅仅储存用户和评论ID供不阅读的评论? 当用户读到评论时,你可以删除表上这一行文。
是否最好在通知表中储存员额时间,然后研究用户的最后活动(储存用户表的价值)。 然后,你可以简单地问:
$lastActivityTime = User->GetLastActivity();
$result = mysql_num_rows(mysql_query("SELECT COUNT(`id`) FROM `notifications` WHERE `postTime` > $lastActivityTime "));
亲爱!
你们可以选择与我的SQL不同的存储方式(Like :MongoDB)。
或者,你可以为通知用户提供公共/次级实施。 (在使用公共代用品的情况下,你打算储存数据。) 通知
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