mongodb数组查询问题

mongodb 内嵌数组查询问题：如何限定返回与条件匹配的数组

dt":ISODate("2015-06-26T13:20:48.449+08:00"),"is_attention":true }]} 查询条件为 db.getCollection('web_mem_favorites').findOne({ '_id':NumberLong(1181675746),'favorite_shards.sid':{ '$in':[NumberLong(577),NumberLong(578)]} ...

mongodb 文档数组查询的一个问题

对多群发消息，文档结构如下：{"from_uid":10000,"to_uid":[{"user_id":100002,"is_read":1,...貌似查询条件里的"to_uid.user_id""to_uid.is_del"是或的关系？db.notice.find({"to_uid.user_id":100002,"to_uid.is_del":0,"create_time":8})

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