- 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
MongoDB query to update array object in index N?
Use update() in MongoDB to update array object. The usage of dot notation is also required. Let us create a collection with documents −
> db.demo489.insertOne( ... { ... ... ... details : [{ ... id : 101, ... "Info1" : { ... "StudentName" : "Chris" ... }, ... "Info2" : { ... "TeacherName" : "David" ... } ... }, ... { ... id : 102, ... "Info1" : { ... "StudentName" : "Carol" ... }, ... "Info2" : { ... "TeacherName" : "Mike" ... } ... } ... ... ] ... } ... ); { "acknowledged" : true, "insertedId" : ObjectId("5e8356e0b0f3fa88e22790ba") }
Display all documents from a collection with the help of find() method −
> db.demo489.find();
This will produce the following output −
{ "_id" : ObjectId("5e8356e0b0f3fa88e22790ba"), "details" : [ { "id" : 101, "Info1" : { "StudentName" : "Chris" }, "Info2" : { "TeacherName" : "David" } }, { "id" : 102, "Info1" : { "StudentName" : "Carol" }, "Info2" : { "TeacherName" : "Mike" } } ] }
Following is the query to update array object −
> db.demo489.update({"details.id":102}, ... {$set: {"details.$.Info1.StudentName":"Robert", ... "details.$.Info2.TeacherName":"John", ... "details.$.CountryName" : "US" ... ... } ... }) WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })
Display all documents from a collection with the help of find() method −
> db.demo489.find().pretty();
This will produce the following output −
{ "_id" : ObjectId("5e8356e0b0f3fa88e22790ba"), "details" : [ { "id" : 101, "Info1" : { "StudentName" : "Chris" }, "Info2" : { "TeacherName" : "David" } }, { "id" : 102, "Info1" : { "StudentName" : "Robert" }, "Info2" : { "TeacherName" : "John" }, "CountryName" : "US" } ] }
Advertisements