- Trending Categories
Data Structure
Networking
RDBMS
Operating System
Java
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
- 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 for documents whose array elements does not have a specific value
For such cases, use $elemMatch. This operator matches documents that contain an array field with at least one element that matches all the specified query criteria.
Let us create a collection with documents −
> db.demo239.insertOne(
... {
... "Name" : "Chris",
... "details" : [
... { "DueDate" : new ISODate("2019-01-21"), "ProductPrice" : 1270 },
... { "DueDate" : new ISODate("2020-02-12"), "ProductPrice" : 2000 }
... ]
... }
...);
{
"acknowledged" : true,
"insertedId" : ObjectId("5e441c6bf4cebbeaebec5157")
}
> db.demo239.insertOne(
... {
... "Name" : "David",
... "details" : [
... { "DueDate" : new ISODate("2018-11-11"), "ProductPrice" : 1450},
... { "DueDate" : new ISODate("2020-02-12") }
... ]
... }
...);
{
"acknowledged" : true,
"insertedId" : ObjectId("5e441c6cf4cebbeaebec5158")
}Display all documents from a collection with the help of find() method −
> db.demo239.find();
This will produce the following output −
{
"_id" : ObjectId("5e441c6bf4cebbeaebec5157"), "Name" : "Chris", "details" : [
{ "DueDate" : ISODate("2019-01-21T00:00:00Z"), "ProductPrice" : 1270 },
{ "DueDate" : ISODate("2020-02-12T00:00:00Z"), "ProductPrice" : 2000 }
]
}
{
"_id" : ObjectId("5e441c6cf4cebbeaebec5158"), "Name" : "David", "details" : [
{ "DueDate" : ISODate("2018-11-11T00:00:00Z"), "ProductPrice" : 1450 },
{ "DueDate" : ISODate("2020-02-12T00:00:00Z") }
]
}Following is the query to fetch documents whose array elements does not have a specific value −
> db.demo239.find({ "details": { "$elemMatch": { "DueDate": { "$exists": true }, "ProductPrice": { "$exists": false } } } })This will produce the following output −
{ "_id" : ObjectId("5e441c6cf4cebbeaebec5158"), "Name" : "David", "details" : [ { "DueDate" : ISODate("2018-11-11T00:00:00Z"), "ProductPrice" : 1450 }, { "DueDate" : ISODate("2020-02-12T00:00:00Z") } ] }
Updated on 30-Mar-2020 13:27:43
- Related Questions & Answers
- Find MongoDB documents where elements of an array have a specific value?
- Find documents where all elements of an array have a specific value in MongoDB?
- MongoDB query to determine if a specific value does not exist?
- Find MongoDB documents where all objects in array have specific value?
- MongoDB query for documents matching array, irrespective of elements order
- MongoDB query to match documents with array values greater than a specific value
- MongoDB query to find documents whose array contains a string that is a substring of a specific word
- Find value above a specific value in MongoDB documents?
- MongoDB query to fetch a document that does not have a particular field?
- Get count of array elements from a specific field in MongoDB documents?
- MongoDB query to get only specific fields in nested array documents?
- Query an array in MongoDB to fetch a specific value
- MongoDB query to update all documents matching specific IDs
- MongoDB query to fetch a specific document rom documents with field value set using NumberInt()?
- MongoDB query to implement nor query to fetch documents except a specific document
Advertisements