Mongo db - Querying nested array and objects

Question

I have the following document structure:

{
   \"_id\":\"12345\",
   \"value\":{
      \"T\":0,
      \"v\":[
         {
            \"name\":\"JW\",
                 


        

Answer 1

It's not clear exactly what you tried, but this should work to find the above doc by name:

db.collection.find({ "value.v.name": "JW" })

Reference

Answer 2

You should use $elemMatch operator:

db.collection.find({
    'value.v': { 
        $elemMatch: {
            name: 'JW', // "name == 'JW'"
            cost : 100 //if you need "&& cost == 100"
        }
    }
});

Mongo docs