Data from session is not added but it is recreated while testing with client side-CodePudding

This

This is output which I get (no matter how many items I add, property ukupnaKol - quantity will always be 1):

This is the postman request (cookie/session settings also):

CodePudding user response：

I have a theory, so not sure that it is the problem you have.

You seem to use the default session storage which is MemoryStore. With this storage, if application restart due for example to an exception, session in memory are lost.

In this case, your test if (!req.session.cart) is true and then session is recreated.

To verify this check the error log.

and also change the session storage for a disk persist storage. You'll find a list here:

Cart needs improvement

That being said, your cart logic seems extremely overcomplicated (making properties non-enumerable, reassigning variables to themselves) and somewhat broken. It is only able to track a single item, and storeItem.currentQty and storeItem.price are always NaN. Your cart should keep an array of the added item IDs and the quantities of each. Here is an example implementation of a cart:

items; constructor(oldCart) { this.items = oldCart?.items ?? []; } addDrink(item) { let cartItem = this.items.find(i => i._id == item._id); if (cartItem == null) { cartItem = { _id: item._id, qty: 0, unitPrice: parseFloat(item.price), }; this.items.push(cartItem); } cartItem.qty ; } get totalQty() { return this.items.reduce( (totalQty, item) => totalQty = item.qty, 0); } get totalPrice() { return this.items.reduce( (totalPrice, item) => totalPrice = item.qty * item.unitPrice, 0.00); } }

Note that in this implementation, the item descriptions are not cached and would have to be retrieved from the database if they are to be displayed - you may want to add a description in as needed.