**express3.x已经废弃了req.flash的这个功能，我看官方文档，是“Removed：req.flash() (just use sessions: req.session.messages = [‘foo’] or similar)”是让我们是用req.session来代替是用req.flash么？我遵循开发指南里面的教程，个人感觉req.flash本身只是一个容器而已，只不过用来存储信息而已。所以我在代码中，凡事需要书中用req.flash存储的信息，我全部用req.session来存储了。比如，req.session.error=’some error‘，然后在app.js中使用这样的代码，app.use(function(req,res,next){ res.locals.user=req.session.user; res.locals.success=req.session.success; res.locals.error=req.session.error; })我以为这样就可以了。但总是提示说模板中的success,user,error无定义。我不能明白这是怎么回事。不是说res.locals里面的变量自动传递给模板引擎吗？
根本不需要配置再app.configure里面啊。根据官方文档，app.configure函数只是一个用来配置根据不同环境而调用不同函数的工具而已，推荐不用。app.configure([env], callback) Conditionally invoke callback when env matches app.get('env'), aka process.env.NODE_ENV. This method remains for legacy reason, and is effectively an if statement as illustrated in the following snippets. These functions are not required in order to use app.set() and other configuration methods. // all environments app.configure(function(){ app.set('title', 'My Application'); }) // development only app.configure('development', function(){ app.set('db uri', 'localhost/dev'); }) // production only app.configure('production', function(){ app.set('db uri', 'n.n.n.n/prod'); }) effectively sugar for: // all environments app.set('title', 'My Application'); // development only if ('development' == app.get('env')) { app.set('db uri', 'localhost/dev'); } // production only if ('production' == app.get('env')) { app.set('db uri', 'n.n.n.n/prod'); }
@fatelovely locals就相当于你的 res.render('',{title:'主页'}) 里的title
success只是locals的其中一个属性而已…
我看别人的代码里面再模板里面都是直接调用变量的。## View options ##
The "view options" setting is no longer necessary, app.locals are the local variables merged with res.render()'s, so app.locals.pretty = true is the same as passing res.render(view, { pretty: true }).
这是express的官方说明啊。
