无法从javascript打印BSON对象

Question

我的mongoDB集合看起来像这样:

{
    "_id" : ObjectId("5070310e0f3350482b00011d"),
    "emails" : [
            {
                    "_id" : ObjectId("5070310e0f3350482b000120"),
                    "_type" : "Email",
                    "name" : "work",
                    "email" : "peter.loescher@siemens.com",
                    "current" : true
            }
    ]
}

这是.js我用来打印内容的代码:

c = db.contacts.findOne( { "emails.email" : { $ne : null } }, { "emails" : 1 } )

print(c._id.toString() + " " + c.emails[0]);

当我尝试运行这个javascript文件时,它只是显示id而不是电子邮件数组.

output:
5070310e0f3350482b00011d [object bson_object]

但是当我尝试c.emails[0].email的是给出正确的结果.即peter.loescher@siemens.com

我只需要显示整个电子邮件嵌入对象.

i.e.
"emails" : [
        {
                "_id" : ObjectId("5070310e0f3350482b000120"),
                "_type" : "Email",
                "name" : "work",
                "email" : "peter.loescher@siemens.com",
                "current" : true
        }
]

我哪里错了？任何帮助,将不胜感激.

Answer 1

您需要printjson输出格式良好的JSON:

printjson(c.emails[0]);

这是文档.