Express&把手 [英] Global properties in Express & Handlebars

问题描述

在NodeJS应用程序中，我使用Handlebars（使用express3-handlebars）进行模板和Passport验证。所有的工作都很好，但是我想知道是否有办法将Passport创建的req.user对象全局传递给Handlebars。

I'm using Handlebars (using express3-handlebars) for templates and Passport for authentication in a NodeJS app. All is working great but I wondered if there is a way to pass the req.user object created by Passport to Handlebars globally.

所以我的头部分可能看起来像这样：

So my header partial might look something like this:

<header>
    <h1>My Title</h1>
    {{#if user}}
        <p>Hello {{user.name}}</p>
    {{else}}
        <p>Please <a href='/login'>Log In</a></p>
    {{/if}}
</header>

因为这样，我必须明确地传递每个页面渲染的用户对象：

As it stands I have to pass the user object explicitly with every page render:

app.get('/', function(req, res){
    res.render('home', {
        page_title: 'welcome',
        user: req.user
    }); 
});

这似乎是错误的方法，因为我需要它在每一页，我不能只需设置一次，所有页面都可以访问？

This seems like the wrong way to go about it as I require it on every page, can I not just set it once and have all pages have access to it?

当我实例化Handlebars时，我不能这样做，因为它依赖于用Passport登录的用户，将不会总是这样。

I can't do this when I instantiate Handlebars as it's dependent on the user being logged in with Passport, which won't always be the case.

将创建一个全局的page_options对象，将其附加并传递给每个渲染都是正确的解决方案或Handlebars / Express具有一个处理这个问题的方法？

Would creating a global 'page_options' object, appending and passing it to every render be the right solution or does Handlebars/Express have a way to handle this?

推荐答案

我以前没有亲自使用护照，但是基于护照README，使用其他身份验证方案，这应该是有效的。

I haven't personally used Passport before, but based on the Passport README and what I've done with other authentication schemes, this should work.

Express 3

app.configure(function() {
    app.use(passport.initialize());
    app.use(passport.session());
    app.use(function(req, res, next) {
        res.locals.user = req.user; // This is the important line

        next();
    });
    app.use(app.router);
});

Express 4

app.use(passport.initialize());
app.use(passport.session());
app.use(function(req, res, next) {
    res.locals.user = req.user; // This is the important line

    next();
});

基本上，渲染之前，您的 app.locals ， res.locals ，您传递给render函数的当地人（第二个参数）都被合并并传递给您的视图引擎。

Basically, right before rendering, your app.locals, res.locals, and the locals you pass into the render function (the second argument) all get combined and passed along to your view engine.

这篇关于Express&把手的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！