req.flash() requires sessions

问题

I have a problem with flash at views. I am using connect-flash.

there is my configuration

app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(express.cookieParser('secret'));
app.use(express.session());
app.use(passport.initialize());
app.use(passport.session());
app.use(flash());
app.use(function(req, res, next){
  res.locals.flash = req.flash
  next()
})

here I set flash message at controller action

exports.new = function(req, res){
  req.flash('info', 'test')

  res.render("session/new", {
    title: 'Log In!'
  })
}

and then, when I am trying to use flash('info') at view, I am getting this error

req.flash() requires sessions

I am new to nodejs, so excuse me please if it's stupid question.

回答1:

maybe you called req.session.destroy() before the flash-data is passed to res.locals?!

回答2:

Take a look at this link. It seems you have to specify it when you're configuring your express server.

回答3:

Try the Redirect instead of render.

Ex.

res.redirect('session/new');

来源：https://stackoverflow.com/questions/19168355/req-flash-requires-sessions