##app.js

app.use(function(req, res, next){
    //这里为什么不对？？？
    res.locals.user = req.session.user;
    res.locals.error = req.flash('error').toString()
    res.locals.success = req.flash('success').toString();
    next();
});

routes(app);

http.createServer(app).listen(app.get('port'), function(){
  console.log('Express server listening on port ' + app.get('port'));
});

##header.ejs

<article>
    <% if (locals.success) { %>
    <div><%= locals.success %></div>
    <% } %>
    <% if (locals.error) { %>
    <div><%= locals.error %></div>
    <% } %>

##index.js

module.exports = function(app){

    app.get('/', function(req, res){
        res.render('index', {
            title: '主页'//,
            //设置在locals里就不用每个页面下面都写这些了
            //user: req.session.user,
            //success: req.flash('success').toString(),
            //error: req.flash('error').toString()
        });
    });

    app.get('/reg', function(req, res){
        res.render('reg', {
            title: '注册',
            //user: req.session.user,
            //success: req.flash('success').toString(),
            //error: req.flash('error').toString()
        })
    });

......

这样的话，redirect之后，error信息并不会显示出来。这是为什么？？？

大家有什么见解，或者这个写法现在不适用了，需要替换？？