Node.js 查询嵌套mongdb文档的属性
我正在尝试查询嵌套对象的属性,但到目前为止运气不佳。假设我的文档看起来像:Node.js 查询嵌套mongdb文档的属性,node.js,mongodb,mongoose,mongodb-query,mongoose-schema,Node.js,Mongodb,Mongoose,Mongodb Query,Mongoose Schema,我正在尝试查询嵌套对象的属性,但到目前为止运气不佳。假设我的文档看起来像: { "_id":"PE", "code": { "5.1": "4.1", "5.2":"4.2", "6.1":"5.1", "6.2":"5.2", "7.1":"6.1", "7.2":"6.2", "7.3":"6.3", "7.4":"6.4", "8.1":"7.1", "8.2":"7.2", "8.3":"7.3",
{
"_id":"PE",
"code": {
"5.1": "4.1",
"5.2":"4.2",
"6.1":"5.1",
"6.2":"5.2",
"7.1":"6.1",
"7.2":"6.2",
"7.3":"6.3",
"7.4":"6.4",
"8.1":"7.1",
"8.2":"7.2",
"8.3":"7.3",
"9":"8",
"10.1":"9.1"}
}
当我查询db.collection('xyz').find({id:PEI})
时,我可以访问这个对象,现在我想从这里进入代码内部,让我们假设使用“code”对象中的键5.1
来获取值4.1
。我怎样才能做到这一点?提前谢谢