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Appending an entry in one to many embedded documents with MongoDB
To append an entry in MongoDB, use $push. Let us create a collection with documents −
> db.demo253.insertOne(
... {
... _id: "101",
... isActive: false,
... details: [
... {
... Name: "Chris",
... },
... {
... CountryName:"US"
... }
... ]
... }
...);
{ "acknowledged" : true, "insertedId" : "101" }Display all documents from a collection with the help of find() method −
> db.demo253.find();
This will produce the following output −
{ "_id" : "101", "isActive" : false, "details" : [ { "Name" : "Chris" }, { "CountryName" : "US" } ] }Following is the query to append an entry in one to many embedded documents −
> db.demo253.update({_id: '101'}, {$push: {details: {Age: 21}}});
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })Display all documents from a collection with the help of find() method −
> db.demo253.find();
This will produce the following output −
{ "_id" : "101", "isActive" : false, "details" : [ { "Name" : "Chris" }, { "CountryName" : "US" }, { "Age" : 21 } ] }
Updated on: 30-Mar-2020
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