這是來自購物車部分的 views.py 檔案，我想在其中添加產品、洗掉產品并在購物車中顯示產品詳細資訊。錯誤是： Cart() 沒有引數。
from django.shortcuts import render, redirect, get_object_or_404
from django.views.decorators.http import require_POST
from ecommerce.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'],
override_quantity=cd['override'])
return redirect('cart:cart_detail')
@require_POST
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)
products = []
for item in cart:
item['update_quantity_form'] = CartAddProductForm(initial={
'quantity': item['quantity'],
'override': True})
return render(request, 'cart/detail.html', {'cart': cart})
這是我的 cart.py 檔案，可以在其中管理購物車。這是添加，洗掉，迭代購物車中的專案等的方法。
from decimal import Decimal
from django.conf import settings
from ecommerce.models import Product
class Cart:
def __int__(self, request):
"""
Initialize the cart.
"""
self.session = request.session
cart = self.session.get(settings.CART_SESSION_ID)
if not cart:
cart = self.session[settings.CART_SESSION_ID] = {}
self.cart = cart
def add(self, product, quantity=1, override_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 override_quantity:
self.cart[product_id]['quantity'] = quantity
else:
self.cart[product_id]['quantity'] = quantity
self.save()
def save(self):
self.session.modified = True
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 __iter__(self):
"""
Iterate over the items in the cart and het the products
from the database
"""
product_ids = self.cart.keys()
products = Product.objects.filter(id_in=product_ids)
cart = self.cart.copy()
for product in products:
cart[str(product.id)]['product'] = product
for item in cart.values():
item['price'] = Decimal(item['price'])
item['total_price'] = item['price'] * item['quantity']
yield item
def __len__(self):
"""
Count all the items in the cart
"""
return sum(item['quantity'] for item in self.cart.values())
def get_total_price(self):
return sum(Decimal(item['price']) * item['quantity'] for item in self.cart.values())
def clear(self):
del self.session[settings.CART_SESSION_ID]
self.save()
回溯錯誤：
Traceback (most recent call last):
File "C:\Users\bbkra\PycharmProjects\djangoProject\venv\lib\site-packages\django\core\handlers\exception.py", line 55, in inner
response = get_response(request)
File "C:\Users\bbkra\PycharmProjects\djangoProject\venv\lib\site-packages\django\core\handlers\base.py", line 197, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\bbkra\PycharmProjects\djangoProject\venv\lib\site-packages\django\views\decorators\http.py", line 43, in inner
return func(request, *args, **kwargs)
File "C:\Users\bbkra\PycharmProjects\djangoProject\cart\views.py", line 10, in cart_add
cart = Cart(request)
TypeError: Cart() takes no arguments
uj5u.com熱心網友回復：
我可以看到一個錯誤，它應該是__init__()方法而不是__int__方法。
這就是為什么Cart(request)給出了這個錯誤，因為__init__()它實際上并沒有被呼叫。
轉載請註明出處，本文鏈接：https://www.uj5u.com/caozuo/530361.html
標籤：Pythondjangodjango模型django-formsdjango-模板