MongoDB findOneAndUpdate() to update a single document

The findOneAndUpdate() is used to update only a single document in MongoDB. Let us create a collection with documents −

db.demo349.insertOne({"Name":"Chris","Marks":56});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5e55384af8647eb59e5620b4")
}
> db.demo349.insertOne({"Name":"David","Marks":78});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5e553853f8647eb59e5620b5")
}
> db.demo349.insertOne({"Name":"Chris","Marks":89});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5e55385af8647eb59e5620b6")
}
> db.demo349.insertOne({"Name":"David","Marks":54});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5e55385ff8647eb59e5620b7")
}

Display all documents from a collection with the help of find() method −

> db.demo349.find();

This will produce the following output −

{ "_id" : ObjectId("5e55384af8647eb59e5620b4"), "Name" : "Chris", "Marks" : 56 }
{ "_id" : ObjectId("5e553853f8647eb59e5620b5"), "Name" : "David", "Marks" : 78 }
{ "_id" : ObjectId("5e55385af8647eb59e5620b6"), "Name" : "Chris", "Marks" : 89 }
{ "_id" : ObjectId("5e55385ff8647eb59e5620b7"), "Name" : "David", "Marks" : 54 }

Following is the query to work with findOneAndUpdate in MongoDB −

> db.demo349.findOneAndUpdate({ "Name" : "David" },{$inc:{Marks:10}});
{
   "_id" : ObjectId("5e553853f8647eb59e5620b5"),
   "Name" : "David",
   "Marks" : 78
}

Display all documents from a collection with the help of find() method −

> db.demo349.find();

This will produce the following output −

{ "_id" : ObjectId("5e55384af8647eb59e5620b4"), "Name" : "Chris", "Marks" : 56 }
{ "_id" : ObjectId("5e553853f8647eb59e5620b5"), "Name" : "David", "Marks" : 88 }
{ "_id" : ObjectId("5e55385af8647eb59e5620b6"), "Name" : "Chris", "Marks" : 89 }
{ "_id" : ObjectId("5e55385ff8647eb59e5620b7"), "Name" : "David", "Marks" : 54 }

AmitDiwan

Published on 02-Apr-2020 07:53:02