Express.js Middleware - Adding items to the response object model
Problem
I'm playing around with Expressjs and am attempting to extract the page title from the default template to middleware instead of passed into the view's model each time.
Default index.jade template
h1= title
p Welcome to the #{title}
Default route from template
exports.index = function(req, res){
res.render('index', { title: "Express" });
};
I attempted the following but get an error from Express saying title
is undefined when I do this.
module.exports = function(req, res, next){
res.title = 'Express';
next();
}
This is obviously a trivial example but it's also something that I am trying to figure out since there will probably come a time where I want to inject things into the response's model after each route. I just cannot figure out how to do such.
Thanks
Solution
You have to use default helpers. Read the documentation. Here's a simple snippet:
app.helpers({
title: 'Express'
});
/* Now JADE sees your variable title
without explicitly defining it
in every view. */
Also look at dynamic helpers in the documentation. These can be linked to req
and res
variables (normal helpers do not depend on request/response).
Discussion
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