Nodejs passing res.end() as callback not working

Question

Hello I am using connect and have:

var app = connect()
 .use(connect.static(directory))
 .use(function(req,res) {
  switch (req.url)
  {
   case '/query':
    exportFunc.query("myquery", res.end);
    break;
  }
}

-- exportFunc.js --
exports.query= function(query, cb) {
 queryServer(query, cb);
}

var queryServer = function(query, cb) {
 cb("MyQueryResult");
}

But I get an error that cb cannot be determined what object it is. Do I need to cast this object into its correct type?

Answer 1

You're not calling the function with the right context (this in the function). You can fix it by replacing

 exportFunc.query("myquery", res.end);

with

 exportFunc.query("myquery", res.end.bind(res));

or

 exportFunc.query("myquery", function(){ res.end() });