Nodejs MongoDB update document

MongoDB’s document is like a table’s row in RDBMS. to update document into the collection through updateOne() or updateMany() method.

Suppose, You have users collections that have 4 documents.

[
	{
		"_id" : ObjectId("5fdc8b842649b8748d4ec107"),
		"name" : "John",
		"age" : 35
	},
	{
		"_id" : ObjectId("5fdcdb87b6dad382104b0f86"),
		"name" : "Rom",
		"age" : 31
	},
	{
		"_id" : ObjectId("5fdcdb87b6dad382104b0f87"),
		"name" : "Mathew",
		"age" : 32
	},
	{
		"_id" : ObjectId("5fdcdb87b6dad382104b0f88"),
		"name" : "Sachin",
		"age" : 38
	}
]

Firstly create the update_document.js file.

var MongoClient = require('mongodb').MongoClient;

let url="mongodb://localhost:27017/";
var options = {
  useNewUrlParser: true,
  useUnifiedTopology: true,  
}
MongoClient.connect(url,options, function (err, connection_obj) {
  try{
     if (err) throw err;
     var dbo = connection_obj.db("users_management");
     var new_values={$set:{age:40}};
     var where_condition={name:"John"}
     dbo.collection("users").updateOne(where_condition,new_values, function(err, res) {
      if (err) throw err;
       console.log("1 document updated successfully");
       //console.log(res);
       console.log(res.result);
       console.log(res.modifiedCount);

       connection_obj.close();
    });

  }catch(err){

    console.log("connection fails");
  
  }

Now, run the update_document.js file.

node update_document.js

Firstly create the update_documents.js file.

var MongoClient = require('mongodb').MongoClient;

let url="mongodb://localhost:27017/";
var options = {
  useNewUrlParser: true,
  useUnifiedTopology: true,  
}
MongoClient.connect(url,options, function (err, connection_obj) {
  try{
   if (err) throw err;
     var dbo = connection_obj.db("users_management");
     var new_values={$set:{age:45}};
     var where_condition={name:/o/}
     dbo.collection("users").updateMany(where_condition,new_values, function(err, res) {
      if (err) throw err;
       console.log("documents updated successfully");
       //console.log(res);
       console.log(res.result);
       console.log(res.modifiedCount);
       connection_obj.close();
    });

  }catch(err){

    console.log("connection fails");
  
  }

Now, run the update_documents.js file.

node update_documents.js