Mongoose find function with priority

I want to make general find in my database with a priority search. For find I use regex and this is my code...

var regex = new RegExp(req.params.id, 'i');
models.project.find(regex, callback(err,items));

Is it posible to make a priority search by setting schema's index in order, like first on priority would be first in schema...like this...

title           : { type:String}, //1 priority
officialTitle   : { type:String}, //2 priority
author          : { type:String}, //...
ckContent       : { type:String }, ...

Also I don't want to use any external libs.