CODEWITHSUNDEEP
pythondjango
Elias Prado
Elias Prado

Reputation: 1817

Remove An Unique Item From Shopping-Cart In Django

I am trying to delete an item from the cart and I have some issues to do it. Here is the function:

def cart_contents(request):
    """
    Ensures that the cart contents are available when rendering
    every page
    """
    cart = request.session.get('cart', {})
    cart_items = []
    total = 0
    destination_count = 0
    for id, quantity in cart.items():
        destination = get_object_or_404(Destinations, pk=id)
        #remove = request.session.pop('cart', {id}) <<<<<<
        price = destination.price
        total += quantity * destination.price
        destination_count += quantity
        cart_items.append({'id': id, 'quantity': quantity, 'destination': destination, 'price':price, 'remove':remove})
    #cart_item will loop into the cart.
    return {'cart_items': cart_items, 'total': total, 'destination_count': destination_count}

Template.html

{% for item in cart_items %}

{{ item.remove }}

{% endfor %}

I've added a remove variable remove = request.session.pop('cart', {id}) but if I use it in the code it will first not allow me to add more than one item and when I click the trash-can-button to remove the item it deletes all the cart in the session. The following image has two items in the card based by its id and the quantity as {'id', quantity} = {'2': 1, '3': 2}.

shopping cart

Upvotes: 0

Views: 1385

Answers (2)

Elias Prado
Elias Prado

Reputation: 1817

I've found the answer. I made cart and quantity correlate each other. So, if you have three items in the cart you can delete/decrement until it reach 0 in the cart and if so, the cart will redirect to the destinations url.

def adjust_cart(request, id):
    """
    Adjust the quantity of the specified product to the specified
    amount

    url for this function should be <str:id> not <int:id>
    - otherwise you need to add str() method for each dict representation.
    """
    cart = request.session.get('cart', {})
    quantity = cart[id] - 1 #decreases the cart quantity until deletes from cart

    if quantity > 0:
        cart[id] = quantity
    else:
        cart.pop(id)
    request.session['cart'] = cart
    if not cart: #if all products be deleted from cart return to destination page
        return redirect(reverse('destination'))
    return redirect(reverse('view_cart'))

cart.html

{% for item in cart_items %}
</tr>
...
  <td class="border-0 align-middle"><a href="{% url 'adjust_cart' item.id%}" class="text-dark"><i class="fa fa-trash"></i></a></td>
</tr>
 {% endfor %}

url.py

from django.urls import path
from . import views

urlpatterns = [
    ...
    ...
    path('adjust/<str:id>/', views.adjust_cart, name="adjust_cart"),
]

Remembering that cart_items is a list with appended dictionary. Please if any acronym is wrong you can correct me.

Upvotes: 0

Rieljun Liguid
Rieljun Liguid

Reputation: 1531

request.session.pop('cart') will remove the cart in the session. Assuming that when you click the delete icon, you pass the id of the cart item, you can get the cart from the session and delete the necessary id and set the session again with the new cart value:

cart = request.session.get("cart", {})
id_to_be_removed = request.POST["id_to_be_removed"]

# do other things here or anywhere else

if id_to_be_removed in cart:
   del cart[id_to_be_removed]  # remove the id
   request.session["cart"] = cart

# return

Upvotes: 2

Related Questions