ExpressJS 3.0如何将res.locals传递给玉视图？ [英] ExpressJS 3.0 How to pass res.locals to a jade view?
问题描述
我想在用户登录失败后显示一条Flash消息，但是我无法将变量显示在我的Jade视图中。
I want to display a flash message after a user fails to sign in but I just can't get the variables to show up in my Jade views.
我有一些作品，我知道我必须在我的app.configure（）中使用这个：
I have some pieces, I know I have to use this in my app.configure():
app.use (req, res, next) ->
res.locals.session = req.session
我会设置什么闪光消息是在用户POSTS错误的密码后：
And I'll set what the flash message is after the user POSTS the wrong password:
exports.postSession = (req, res) ->
users = require '../DB/users'
users.authenticate(req.body.login, req.body.password, (user) ->
if(user)
req.session.user = user
res.redirect(req.body.redirect || '/')
else
req.session.flash = 'Authentication Failure!'
res.render('sessions/new', {title:'New', redirect: req.body.redirect })
)
我不知道如何在我的Jade文件中访问 res.locals.session 。我怀疑我正在设置一切正确。这个问题很像这样：迁移Express.js 2到3，特别是app.dynamicHelpers（）到app.locals.use？，但我仍然无法让它工作。如果有人可以向我显示一个在res.local中设置值并在视图中访问它们的简单示例，那将是非常感激的。
I don't know how to access res.locals.session in my Jade file. I doubt I am setting everything up right. This question is a lot like this one: Migrating Express.js 2 to 3, specifically app.dynamicHelpers() to app.locals.use? but I still can't get it to work. It would be much appreciated if someone could show me just a simple example of setting values in res.local and accessing them in a view.
p.s。我知道连接闪存，但我需要了解如何使视图中的东西可用。
p.s. I do know about connect-flash but I need to understand how to make things available in views.
这是我的应用程序：
app.configure(() ->
app.set('views', __dirname + '/views')
app.set('view engine', 'jade')
app.use(express.bodyParser())
app.engine('.jade', require('jade').__express)
app.use(express.methodOverride())
app.use(express.cookieParser())
app.use(express.session({ store: new express.session.MemoryStore({reapInterval: 50000 * 10}), secret: 'chubby bunny' }))
app.use(express.static(__dirname + '/public'))
app.use((req, res, next) ->
res.locals.session = req.session
next()
)
app.use(app.router)
)
推荐答案
只是给每个有同样问题的人简短的总结，得到被解决的印象。 res.redirect 。
Just to give a short summary for everyone who has the same problem and got the impression that is was solved changing res.redirect.
将 app.use middleware be前端 app.router 。参见TJ Holowaychuck的评论，作者是
It is very important to put your app.use middleware before app.router. See the comments by TJ Holowaychuck, the author of express
- https://groups.google.com/d/msg/express-js/72WPl2UKA2Q/dEndrRj6uhgJ
这里是一个使用express v3.0.0rc4的全新安装的示例
Here is an example using a fresh installation of express v3.0.0rc4
app.js：
app.use(function(req, res, next){
res.locals.variable = "some content";
next();
})
app.configure(function(){
app.set('port', process.env.PORT || 3000);
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));
});
index.jade：
index.jade:
extends layout
block content
h1= title
p Welcome to #{title}
p= variable
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