Error: req.flash() requires sessions

问题

I'm new to node and I'm pretty sure I've set up the middle ware and express to use flash messaging however I still get the error:

Error: req.flash() requires sessions

Setup

//express.js
     var flash = require('connect-flash')

     module.exports = function (app, config, passport) {
         app.use(flash());
     };

//route js
     exports.loginGet = function (req, res) {
       res.render('users/login', {
         title: 'Login',
         message: req.flash('error') //error in question
       });
     };

What else can I do to make sure I have everything set up correctly and get it working?

回答1:

From the readme (emphasis mine):

Flash messages are stored in the session. First, setup sessions as usual by enabling cookieParser and session middleware. Then, use flash middleware provided by connect-flash.

Using express-sessions with express 4, cookieParser is no longer required.

var session = require('express-session');

//...


app.use(session({ cookie: { maxAge: 60000 }, 
                  secret: 'woot',
                  resave: false, 
                  saveUninitialized: false}));

回答2:

Please check mongodb connections. there may be an mongo error like "mongoError: Topology was destroyed". To fix this issue, check here

回答3:

In my case the issue was that Redis was not listening. I found that out by enabling the logErrors property:

new RedisStore({
  host: 'localhost',
  port: '6379',
  logErrors: true,
});

Which resulted in messages like these:

Warning: connect-redis reported a client error: Error: Redis connection to localhost:6379 failed - connect ECONNREFUSED 127.0.0.1:6379

来源：https://stackoverflow.com/questions/30563321/error-req-flash-requires-sessions

标签

node.js

flash

express