mongodb查询size大于1的内嵌list的document

时间：2014-02-07 00:40:18 收藏：0 阅读：1221

db.user_profile.find({ $where: "this.disk_rack.length > 1" } )

但是这种js引擎执行的会非常慢

更好的办法是

CreateextrafieldNamesArrayLength, update it with names array length and then use in queries:

db.accommodations.find({"NamesArrayLength": {$gt: 1} });


It will be better solution, and will work much faster (you can create index on it).

原文：http://lonelyprogram.blog.51cto.com/6246243/1355271