node.js - mongoose and express - how to combine two functions into one output -

i'm trying make search form site, 2 separate inputs, 1 title keywords , other 1 body of post. don't know how pass these 2 variables (asd title , asdd body) function, thats app.js file :

app.get('/search', function(req, res) {     postdb.findbytitle(asd, function(error, article) {         res.render('search.jade',         { locals: {             title: article.title,             articles:article         }         });     }); }); 

and here function finding (check bold parts):

postdb.prototype.findbytitle = function(**asd asdd**, callback) {     this.getcollection(function(error, article_collection) {       if( error ) callback(error)       else {         article_collection.find({**title: asd, body:asdd**}).toarray(function(error, results) {           if( error ) callback(error)           else callback(null, results)         });       }     }); }; 

pass couple of query string params url /search.

for example:

 /search?title=asd&body=asdd; 

and use req object grab them , pass function:

app.get('/search', function(req, res) {     var title = req.query.title        ,body = req.query.body;      postdb.findbytitle(title, body, function(error, article) {         res.render('search.jade',         { locals: {             title: article.title,             articles:article         }         });     }); });