MongoDB query to insert an array element with a condition?

Let us first create a collection with documents −

>db.demo11.insertOne({"ListOfStudent":[{"StudentName":"Chris","ListOfScore":[76,67,54,89]}]}); {    "acknowledged" : true,    "insertedId" : ObjectId("5e0f6e34d7df943a7cec4fa1") }

Following is the query to display all documents from a collection with the help of find() method −

> db.demo11.find().pretty();

This will produce the following output −

{    "_id" : ObjectId("5e0f6e34d7df943a7cec4fa1"),    "ListOfStudent" : [       {          "StudentName" : "Chris",          "ListOfScore" : [             76,             67,             54,             89          ]       }    ] }

Here is the query to insert an array element with a condition −

> db.demo11.update( {"ListOfStudent.StudentName":"Chris"}, {$push:{"ListOfStudent.$.ListOfScore":98}} ); WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })

Let us check the documents once again −

> db.demo11.find().pretty();

This will produce the following output −

{    "_id" : ObjectId("5e0f6e34d7df943a7cec4fa1"),    "ListOfStudent" : [       {          "StudentName" : "Chris",          "ListOfScore" : [             76,             67,             54,             89,             98          ]       }    ] }