calling db.collection.find() within db.eval()

Question

I have written a javascript function which will get executed inside db.eval() on mongodb on my nodejs platform.

my js function is:

function(data){
    var d = {
        vehicle_id:data.vehicle_id,
        timestamp:{
            $gte:data.start_time,
            $lte:data.end_time
        }
    };
    var routeStatus = [];

    db.location.find(d,function(err,result){
            db.result.insert({result});
    });
 }

which is minified to an string 'code' to be passed to db.eval()

var code = 'function(data){var d={vehicle_id:data.vehicle_id, timestamp:{$gte:data.start_time, $lte:data.end_time}}; db.location.find(d,function(err,result){return result;});}';

db.eval(code,[info],function(err,result){
    log(result);

});

the info object contains all required fields getting called by function;

Now main question is db.location.find() is an asynch call so how could i get its result return to callback of db.eval(); ?

if i simply do return result from callback of db.location.find() then i get nothing returned as its being an async call.

Answer 1

got the answer, thanks to @NeilLunn for giving small but useful tip. the .toArray() worked

simple doing

var docs = db.location.find().toArray();

worked for me.