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Can MongoDB return result of increment?
Yes, you can achieve this with findAndModify(). Let us first create a collection with documents −
> db.returnResultOfIncementDemo.insertOne({"PlayerScore":98});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd3c292edc6604c74817cda")
}Following is the query to display all documents from a collection with the help of find() method −
> db.returnResultOfIncementDemo.find();
This will produce the following output −
{ "_id" : ObjectId("5cd3c292edc6604c74817cda"), "PlayerScore" : 98 }Following is the query to return result of increment. Here, we have incremented PlayerScore by 2 −
> db.returnResultOfIncementDemo.findAndModify({
... query:{},
... update: { $inc: {PlayerScore: 2 }},
... new: true
... });This will produce the following output −
{ "_id" : ObjectId("5cd3c292edc6604c74817cda"), "PlayerScore" : 100 }
Updated on: 30-Jul-2019
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