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Get attribute list from MongoDB object?
To get attribute list from MongoDB object, you can use for loop to extract key and value for document. Let us create a collection with documents −
>db.getAttributeListDemo.insertOne({"StudentId":101,"StudentName":"John","StudentAdmissi
onDate":new ISODate('2019-01-12'),"StudentSUbjects":["MongoDB","Java","MySQL"]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cbdfcc9ac184d684e3fa269")
}Display all documents from a collection with the help of find() method −
> db.getAttributeListDemo.find().pretty();
This will produce the following output −
{
"_id" : ObjectId("5cbdfcc9ac184d684e3fa269"),
"StudentId" : 101,
"StudentName" : "John",
"StudentAdmissionDate" : ISODate("2019-01-12T00:00:00Z"),
"StudentSUbjects" : [
"MongoDB",
"Java",
"MySQL"
]
}Following is the query to get attribute list from MongoDB object −
> var myDocument = db.getAttributeListDemo.findOne();
> for (myKey in myDocument) {
... var originalValue = myDocument[myKey];
... print(myKey + "(" + typeof(originalValue ) + "): " + originalValue ) };This will produce the following output −
_id(object): 5cbdfcc9ac184d684e3fa269 StudentId(number): 101 StudentName(string): John StudentAdmissionDate(object): Sat Jan 12 2019 05:30:00 GMT+0530 (India Standard Time) StudentSUbjects(object): MongoDB,Java,MySQL
Updated on: 30-Jul-2019
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