只显示文档中所有的特定字段

iteye_15461

于 2013-11-09 14:48:11 发布

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分类专栏： mongodb

本文链接：https://blog.youkuaiyun.com/iteye_15461/article/details/82548383

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本文介绍了一个具体的日程事件查询示例，展示了如何通过数据库查询获取指定的日程信息，包括事件的主题、日期、时间等详细属性。

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{
    "_id": {
        "$id": "515bb7e2a00b2add0b000001"
    },
    "user_id": "user_8888",
    "events": {
        "common test I": {
            "subject": "common test I",
            "start_date": "04/14/2013",
            "start_time": "8.00 AM",
            "end_date": "04/14/2013",
            "end_time": "10.30 AM",
            "all_day_event": "false",
            "discription": "no discription",
            "location": "STC",
            "private": "false",
            "time_zone": "IST",
            "alarm": "true",
            "alarm_threshold": "5",
            "status": "true"
        }
    }
}

只要
 {
            "subject": "common test I",
            "start_date": "04/14/2013",
            "start_time": "8.00 AM",
            "end_date": "04/14/2013",
            "end_time": "10.30 AM",
            "all_day_event": "false",
            "discription": "no discription",
            "location": "STC",
            "private": "false",
            "time_zone": "IST",
            "alarm": "true",
            "alarm_threshold": "5",
            "status": "true"
        }

db.collection.find({},{"events.common test I":1,_id:0})