mongodb查询size大于1的内嵌list的document

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).

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