Lets assume that i have a collection that contains
_id
first_name
last_name
...
how can I select all fields including custom like the following:
db.collection_name.findOne({},{*,$full_name:{$value:first_name+' '+last_name}});
This is just an example.
how can we select all fields with some custom fields like full_name
where
full_name=first_name+' '+last_name