A
A
Alexander Bondarenko2020-07-08 13:42:55
Django
Alexander Bondarenko, 2020-07-08 13:42:55

Why is the item not being added to the Django cart?

The product is not added to the cart, although the links are correct, tell me what's the problem? I pass from another application shop?, the link works, but the addition does not occur.
urls.py

from django.urls import path, include
from . import views

app_name='cart'

urlpatterns = [
    path('add/<int:product_id>/', views.cart_add, name='cart_add'),
    path('remove/<int:product_id>/', views.cart_remove, name='cart_remove'),
    path('', views.cart_detail, name='cart_detail'),
]

views.py
from django.shortcuts import render, redirect, get_object_or_404
from django.views.decorators.http import require_POST
from shop.models import Product, Category
from .cart import Cart
from .forms import CartAddProductForm


@require_POST
def cart_add(request, product_id):
    cart = Cart(request)
    product = get_object_or_404(Product, id=product_id)
    form = CartAddProductForm(request.POST)
    if form.is_valid():
        cd = form.cleaned_data
        cart.add(product=product,
                 quantity=cd['quantity'],
                 update_quantity=cd['update'])
    return redirect('cart:cart_detail')

def cart_remove(request, product_id):
    cart = Cart(request)
    product = get_object_or_404(Product, id=product_id)
    cart.remove(product)
    return redirect('cart:cart_detail')

def cart_detail(request):
    cart = Cart(request)
    categories= Category.objects.all()
    return render(request, 'cart/detail.html', {'cart': cart,'categories':categories})

forms.py

from django import forms

PRODUCT_QUANTITY_CHOICES = [(i, str(i)) for i in range(1, 21)]


class CartAddProductForm(forms.Form):
    quantity = forms.TypedChoiceField(choices=PRODUCT_QUANTITY_CHOICES, coerce=int)
    update = forms.BooleanField(required=False, initial=False, widget=forms.HiddenInput)

cart.py

from decimal import Decimal
from django.conf import settings
from shop.models import Product


class Cart(object):

    def __init__(self, request):
        """
        Инициализируем корзину
        """
        self.session = request.session
        cart = self.session.get(settings.CART_SESSION_ID)
        if not cart:
            # save an empty cart in the session
            cart = self.session[settings.CART_SESSION_ID] = {}
        self.cart = cart
    
    def add(self, product, quantity=1, update_quantity=False):
        """
        Добавить продукт в корзину или обновить его количество.
        """
        product_id = str(product.id)
        if product_id not in self.cart:
            self.cart[product_id] = {'quantity': 0,
                                    'price': str(product.price)}
        if update_quantity:
            self.cart[product_id]['quantity'] = quantity
        else:
            self.cart[product_id]['quantity'] += quantity
        self.save()

    def save(self):
        # Обновление сессии cart
        self.session[settings.CART_SESSION_ID] = self.cart
        # Отметить сеанс как "измененный", чтобы убедиться, что он сохранен
        self.session.modified = True
    
    def remove(self, product):
        """
        Удаление товара из корзины.
        """
        product_id = str(product.id)
        if product_id in self.cart:
            del self.cart[product_id]
            self.save()


    def __iter__(self):
        """
        Перебор элементов в корзине и получение продуктов из базы данных.
        """
        product_ids = self.cart.keys()
        # получение объектов product и добавление их в корзину
        products = Product.objects.filter(id__in=product_ids)
        for product in products:
            self.cart[str(product.id)]['product'] = product

        for item in self.cart.values():
            item['price'] = Decimal(item['price'])
            item['total_price'] = item['price'] * item['quantity']
            yield item

    def __len__(self):
        """
        Подсчет всех товаров в корзине.
        """
        return sum(item['quantity'] for item in self.cart.values())

    def get_total_price(self):
        """
        Подсчет стоимости товаров в корзине.
        """
        return sum(Decimal(item['price']) * item['quantity'] for item in
                self.cart.values())

    
    def clear(self):
        # удаление корзины из сессии
        del self.session[settings.CART_SESSION_ID]
        self.session.modified = True

The form
<form action="{% url 'cart:cart_add' product.id %}" method="post">
                    {{ cart_product_form }}
                    {% csrf_token %}
                    <button class="main-content_block-item_btn" type="submit">
                        В корзину
                    </button>
                </form>

Answer the question

In order to leave comments, you need to log in

Didn't find what you were looking for?

Ask your question

Ask a Question

731 491 924 answers to any question