MongoDB object property $exists in nested array

Question

I have a folowing object structure in my db collection:

{
    \"name\" : \"test\",
    \"code\" : \"test\",
    \"attributes\" : [ 
        {
            \"name\         


        

Answer 1

The $elemMatch operator matches documents that contain an array field with at least one element that matches all the specified query criteria.

This query work for me:

db.getCollection('testeur').find({ "attributes": {
        $exists: true, 
        $ne: [],
        $elemMatch: { "value": {$exists: false } } 
    }
})