Undefined method flash in the view of node.js

Question

Problem in accessing flash messages on view in node.js In my Controller

this.req.flash('info','successfully submited');
this.redirect("/home");

In my home view I am not able to get flash messages as

req.flash('info');

EDIT In controller

self.req.flash('message','hello');

In view

<%= req.flash('message) %>

In server.js

app.configure(function (){

  app.use(express.cookieParser());
  app.use(express.session({ secret:'yoursecret',cookie: { maxAge: 24 * 60 * 60 * 1000 }}));
  app.use(passport.initialize());
  app.use(locomotive.session());
  app.use(flash());
  app.use(passport.session());
  app.use(app.router);

  app.dynamicHelpers({ messages: require('express-messages') });
});

I have the locomotive framework.

There isn't enough information in your question to help. Are you correctly requiring connect-flash? Did you use it with app.use(flash)? What else have you tried? — Matthew Bakaitis
– Matthew Bakaitis, Commented May 28, 2014 at 13:17
yes i have added app.use(flash) in server.js and also used connect-flash. problem comes in view when i use flash().error comes that undefined method flash(). — user3680001
– user3680001, Commented May 28, 2014 at 13:23
Can you post that code? If that's the problem and it isn't in the question, there's not much we can do to help. :) — Matthew Bakaitis
– Matthew Bakaitis, Commented May 28, 2014 at 13:24

Nikolay Lukyanchuk · Accepted Answer · 2014-05-28 13:21:33Z

Please see tempdata example https://github.com/MKxDev/TempData

var tempData = require('tempdata');
    var app = express();

    app.configure(function() {
        ...

        // This has to appear BEFORE the router
        app.use(express.cookieParser());
        app.use(express.session({ secret: 'your_super_secret_session_key' })); // please change this!
        app.use(tempData);

        ...
    });

    ...

    // Routes
    app.get('/', function(req, res) {
        // Retrieve tempData value here. It won't exist unless the request
        // was redirected
        var tempVal = JSON.stringify(req.tempData.get('test_val'));

        res.render('index', { title: 'Express', temp: tempVal });
    });

    app.post('/', function(req, res) {
      // Set tempData value here
        req.tempData.set('test_val', { x: 'Hello World!' });

        res.redirect('/');
    });

Matthew Bakaitis · Accepted Answer · 2014-05-28 13:43:13Z

0

Move your app.use(flash()) higher in the order...see below. Flash needs to be initialized before passport so that flash is recognized and available to passport.

app.configure(function (){
  app.use(express.cookieParser());
  app.use(express.session({ secret:'yoursecret',cookie: { maxAge: 24 * 60 * 60 * 1000 }}));
  app.use(flash()); // moved this up a few lines
  app.use(passport.initialize());
  app.use(locomotive.session());
  app.use(passport.session());
  app.use(app.router);
  app.dynamicHelpers({ messages: require('express-messages') });
});

answered May 28, 2014 at 13:43

Matthew Bakaitis

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3 Comments

user3680001 Over a year ago

sir,still error comes in view that undefined flash() method

Matthew Bakaitis Over a year ago

In the view? Ahhh... First, is there a typo in your view? There's a typo in the question regarding the view that I didn't notice - a missing single-quote. Second, how are you passing req.flash to the view? Are you setting self = this at some point?

user3680001 Over a year ago

Matt Bakaitis yes i m setting self=this and req.flash

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