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
Can we search an array of objects in MongoDB?
Yes, to search an array of objects, use $unwind in MongoDB aggregate(). To match, use $match. Let us create a collection with documents −
> db.demo623.insertOne(
... {
... _id:1,
... details:[
... {
... Name:"Chris"
... },
... {
... DueDate:new ISODate("2020-01-10")
... },
... {
... CountryName:"US"
... }
... ]
... }
... );
{ "acknowledged" : true, "insertedId" : 1 }Display all documents from a collection with the help of find() method −
> db.demo623.find().pretty();
This will produce the following output −
{
"_id" : 1,
"details" : [
{
"Name" : "Chris"
},
{
"DueDate" : ISODate("2020-01-10T00:00:00Z")
},
{
"CountryName" : "US"
}
]
}Following is the query to search an array of objects in MongoDB −
> db.demo623.aggregate({$unwind: "$details"},
... {$match: {"details.Name":"Chris"}},
... {$project: {"details.Name": 1}})This will produce the following output −
{ "_id" : 1, "details" : { "Name" : "Chris" } }
Updated on: 12-May-2020
365 Views
Advertisements