Writing to Session in CakePHP doesn't Save

Question

Just solved one issue here, now another...

As mentioned before, I'm following this tutorial to create a simple shopping cart using CakePHP, Ajax and Bootstrap.

I've got it working for the most part except it appears though that the items added to the cart aren't saved. I can add an item, move around the website and even change it's quantity and it remains as is - however, when I try to add another item - the second item just completely overwrites the first item.

This is the CakePHP Cart Model function that runs when adding an item:

public function addProduct($productId) {
        $allProducts = $this->read();
        if (null!=$allProducts) {
            if (array_key_exists($productId, $allProducts)) {
                $allProducts[$productId]++;
            } else {
                $allProducts[$productId] = 1;
            }
        } else {
            $allProducts[$productId] = 1;
        }

        $this->saveProduct($allProducts);
    }


public function saveProduct($data) {
        return CakeSession::write('cart',$data);
}

That's called by the add Function in the Controller:

 public function add() {
        $this->autoRender = false;
        if ($this->request->is('post')) {
            $this->Cart->addProduct($this->request->data['Cart']['product_id']);
        }
        echo $this->Cart->getCount();
    }

My Cart Model looks like this at the start:

<?php
App::uses('AppModel', 'Model');
App::uses('CakeSession', 'Model/Datasource');

class Cart extends AppModel {....}

any reason why you are using CakeSession instead of Session Component? — Nunser
Looks like a logic error. Unless you've redefined $this->read() - when you call it you'll get the data for one item returned. You then overwrite the session data with that one item's data. @Nunser there's no session component in a model; there is a static session interface anywhere though. — AD7six
To be honest, I'm still learning so I'm not sure what it exactly does... It's straight off the tutorial here and it says it works for them! @AD7six - how would I redefine it to read them all instead of just one? — Chronix3
I solved it! It was a typo on the tutorial. It should've been readProduct() not just read(), since later on there is this function: public function readProduct() {return CakeSession::read('cart');} — Chronix3

Chronix3 Chronix3 · Accepted Answer · 2014-04-26T03:04:52

Solved: There is a typo in the tutorial, it should be readProduct() not read() at the start of the addProduct function.

Writing to Session in CakePHP doesn't Save

1 Answers