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嘗試創建購物車應用程序,並且當前停止嘗試從購物車中刪除單個項目。我似乎無法確定如何刪除單個產品,因爲它使用remove函數刪除所有產品ID。從Django購物車中刪除單個項目
這是cart.py文件:
from decimal import Decimal
from django.conf import settings
from shop.models import Product
class Cart(object):
def __init__(self, request):
"""
Initialize the cart.
"""
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 __len__(self):
"""
Count all items in the cart.
"""
return sum(item['quantity'] for item in self.cart.values())
def __iter__(self):
"""
Iterate over the items in the cart and get the products from the database.
"""
product_ids = self.cart.keys()
# get the product objects and add them to the cart
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 add(self, product, quantity=1, update_quantity=False):
"""
Add a product to the cart or update its quantity.
"""
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 remove(self, product):
"""
Remove a product from the cart.
"""
product_id = str(product.id)
if product_id in self.cart:
del self.cart[product_id]
self.save()
def save(self):
# update the session cart
self.session[settings.CART_SESSION_ID] = self.cart
# mark the session as "modified" to make sure it is saved
self.session.modified = True
def clear(self):
# empty cart
self.session[settings.CART_SESSION_ID] = {}
self.session.modified = True
def get_total_price(self):
return sum(Decimal(item['price']) * item['quantity'] for item in self.cart.values())
這是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
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(product.category.get_absolute_url())
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)
for item in cart:
item['update_quantity_form'] = CartAddProductForm(initial={'quantity': item['quantity'],
'update': True})
return render(request, 'cart/detail.html', {'cart': cart})
任何幫助,非常感謝!
謝謝,這是完美的,它的工作原理!有冒號(:)的python語法錯誤,所以我們需要使用沒有。 – Rutnet
謝謝,我修復了語法錯誤 – Alasdair