Node Js强大的Heroku

Question

On my local webserver the following code works perfectly, if i send post request with postman.

    var postData;

    var form = new formidable.IncomingForm();
    form.parse(req,function(err,fields,files){
        postData = fields;
    });

    var userName = postData.userName;
    var password = postData.password;

On Heroku i get the following error:

TypeError: Cannot read property 'userName' of undefined

Local is variable postData a form object. On Heroku it us undefined.

Answer 1

This is because of async nature of node.js. Try something like this -

var userName, password;

form.parse(req,function(err,fields,files){
        postData = fields;
        userName = postData.userName;
        password = postData.password;
    });