Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to add a field with specific datatype (list, object) in an existing MongoDB document?
You can use $set. Let us create a collection with documents −
> db.demo732.insertOne({_id:1,Language:"English"});
{ "acknowledged" : true, "insertedId" : 1 }
> db.demo732.insertOne({_id:2,Language:"Hindi"});
{ "acknowledged" : true, "insertedId" : 2 }Display all documents from a collection with the help of find() method −
> db.demo732.find();
This will produce the following output −
{ "_id" : 1, "Language" : "English" }
{ "_id" : 2, "Language" : "Hindi" }Following is the query to add a field with specific datatype (list, object) in an existing MongoDB document −
> db.demo732.update({_id:1},
... { $set:{details:{'subjectName':"MongoDB"}, studentDetails:[{Name:"David"},{CountryName:"US"}]}})
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })Display all documents from a collection with the help of find() method −
> db.demo732.find();
This will produce the following output −
{ "_id" : 1, "Language" : "English", "details" : { "subjectName" : "MongoDB" }, "studentDetails" : [ { "Name" : "David" }, { "CountryName" : "US" } ] }
{ "_id" : 2, "Language" : "Hindi" }
Updated on: 15-May-2020
358 Views
Advertisements