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accidiaV2EX 第 190269 号会员，加入于 2016-09-03 23:00:26 +08:00 |
accidia 最近回复了
2017-08-19 00:19:36 +08:00 回复了 wangzhe 创建的主题 › MongoDB › mongo 如何获取内嵌字段的部分值 |
```
> db.docs.aggregate([ {$match: {_id: '12345'}} , {$project: {contacts: 1, _id: 0}} , {$unwind: '$contacts'}, {$match: {'contacts.phones': '18969121111'}}, {$project: {'contacts.name': 1}}])
{ "contacts" : { "name" : "飞珏" } }
```
> db.docs.aggregate([ {$match: {_id: '12345'}} , {$project: {contacts: 1, _id: 0}} , {$unwind: '$contacts'}, {$match: {'contacts.phones': '18969121111'}}, {$project: {'contacts.name': 1}}])
{ "contacts" : { "name" : "飞珏" } }
```
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