Remove element from nested array mongodb

Question

i have the following document , it has two array\'s , one inside the other ,
attachment array and files array inside attachment array . i want to delete an element insi

Answer 1

You can try below update query in 3.6 version.

Invoice.update( 
 {}, 
 {"$pull":{"attachment.$[].files":{_id:ObjectId("5b7969ac8fb15f3e5c8e844e")}}}, 
 {"multi": true}, function (err, result) {console.log(result);
});

Use db.adminCommand( { setFeatureCompatibilityVersion: 3.6 or 4.0 depending on your version } ) if your are upgrading from old version.