java - Android Firestore querying particular value in Array of Objects

Question

This is my structure of the firestore database:

Expected result: to get all the jobs, where in the experience array, the lang value is "Swift".

So as per this I should get first 2 documents. 3rd document does not have experience "Swift".

Query jobs = db.collection("Jobs").whereArrayContains("experience.lang","Swift");
jobs.get().addOnSuccessListener(new OnSuccessListener<QuerySnapshot>() {
            @Override
            public void onSuccess(QuerySnapshot queryDocumentSnapshots) {
               //Always the queryDocumentSnapshots size is 0
            }
        });

Tried most of the answers but none worked out. Is there any way to query data in this structure? The docs only available for normal array. Not available for array of custom object.

Answer 1

Waitting for answers