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How to return documents of a collection without objectId in MongoDB?
To return documents of a collection without objectId, set _id:0. Let us first create a collection with documents −
> db.returnDocumentWithoutObjectId.insertOne({"Name":"Carol","Age":25});
{
"acknowledged" : true,
"insertedId" : ObjectId("5ce8ba6c78f00858fb12e8fa")
}
> db.returnDocumentWithoutObjectId.insertOne({"Name":"Sam","Age":21});
{
"acknowledged" : true,
"insertedId" : ObjectId("5ce8ba6d78f00858fb12e8fb")
}
> db.returnDocumentWithoutObjectId.insertOne({"Name":"John","Age":23});
{
"acknowledged" : true,
"insertedId" : ObjectId("5ce8ba6f78f00858fb12e8fc")
}Following is the query to display all documents from a collection with the help of find() method −
> db.returnDocumentWithoutObjectId.find();
This will produce the following output −
{ "_id" : ObjectId("5ce8ba6c78f00858fb12e8fa"), "Name" : "Carol", "Age" : 25 }
{ "_id" : ObjectId("5ce8ba6d78f00858fb12e8fb"), "Name" : "Sam", "Age" : 21 }
{ "_id" : ObjectId("5ce8ba6f78f00858fb12e8fc"), "Name" : "John", "Age" : 23 }Following is the query to return documents of a collection without objectId in MongoDB −
> db.returnDocumentWithoutObjectId.find({},{_id:0});This will produce the following output −
{ "Name" : "Carol", "Age" : 25 }
{ "Name" : "Sam", "Age" : 21 }
{ "Name" : "John", "Age" : 23 }
Updated on: 30-Jul-2019
2K+ Views
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