MongoDB query criteria not working correctly Meteor / JavaScript -

i have products collection attribute called "productcode". trying write server-side query return product based on productcode attribute, keep getting "cannot read property 'propertycode' of undefined" error.

here method call:

meteor.call('findproduct', searchval, function(error, a) {         if(error) {             alert(error.reason)         } else {             console.log('search success!');         }     }); 

here methods.js code giving me error:

'findproduct': function(searchval, a) {     = products.findone({productcode: searchval});     return a; //return product of interest } 

error: exception in delivering result of invoking 'findproduct': typeerror: cannot read property 'productcode' of undefined

however, if hard code in product code, works:

'findproduct': function(searchval, a) {     = products.findone({productcode: 9021073});     return a; //this return product } 

in terminal console, works well:

db.products.findone({productcode: 291105300}); 

any ideas might doing wrong?

ah - reason string. converted integer using parseint , worked!