mvc.md

The MVC Pattern

• Every time a request is made on the server, a Controller handles it.
• This Controller will communicate with Models.
• Models will read and write data directly to a database.
• When the Controller has all information, it can pass that data to the View.
• The View generates a Response which is a HTML page rendered to a client (in a browser).

Example:

router.get('/product-list', (req, res) => {
  // this CONTROLLER is...
  Product.find() // ... asking for data from the Product MODEL and ...
    .then(productsFromDB => {
      const data = { productsFromDB };
      res.render('products/list', data); //  ... sending a VIEW to the client
    })
    .catch(error => console.log(error));
});