Node.js - Expressjs中间件扩展res.render

Question

我想知道是否有一种内置的方法来扩展Express.js的res.render函数,因为我想将一组默认的"locals"传递给每个渲染的模板.目前我编写了一个小型中间件,它使用underscore.js的扩展函数来合并默认的"locals"和特定于该模板的"locals":

app.use(function(req, res, next){
    res.render2 = function (view, locals, fn) {
        res.render(view, _.extend(settings.template_defaults, locals), fn);
    };
    next();
});

有一个更好的方法吗？

Answer 1

app.locals 很可能你正在寻找:

app.locals(settings.template_defaults);

随着res.locals和res.render,Express已经能够为您合并价值:

// locals for all views in the application
app.locals(settings.template_defaults);

// middleware for common locals with request-specific values
app.use(function (req, res, next) {
    res.locals({
        // e.g. session: req.session
    });
    next();
});

// and locals specific to the route
app.get('...', function (req, res) {
    res.render('...', {
        // ...
    });
});