I have a collection of 15000 documents. Some documents have sr_no with numeric values and other with absent of sr_no.
Now i want to get entries like all documents comes first which has sr_no with asc then all others.
I tried .find().sort({sr_no:1}) but it return all null entries first then asc with sr_no.
This question seems too close with duplicate. But slightly defer with numeric key.
I answered it with hack below.