Insert Object inside an object in MongoDB

Here We’ll discuss how we can insert an object inside an existing object in MongoDB

$set plays an important role here as, If the field does not exist, $set will add a new field with the specified value…

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Suppose we have an exiting document as following

{
 “firstName”: “John”,
 “lastName”: “Doe”,
 “age”: 50,
 “address”:{
 “current address”: “USA”,
 },
 “metadata”:{
 “Primary School”:”YES”,
 “High School”:”YES”,
 “Graduate”:”YES”,
 “Post Graduate”:”NO”,
 “Professional”:”YES”,
 },
}

and the requirement is to insert following object inside address

“permanent address” : {
 “state” : “UP”,
 “country” : “India”
 }

For this query will be

db.data.update({“firstName”: “John”}, {$set:{“address.permanent address”:{“state”: “UP”, “country”: “India”}}}

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