class Cart(object):
def __init__(self, request):
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, update_quantity=False):
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):
self.session[settings.CART_SESSION_ID] = self.cart
self.session.modified = True
def remove(self, product):
product_id = str(product.id)
if product_id in self.cart:
del self.cart[product_id]
self.save()
def __iter__(self):
product_ids = self.cart.keys()
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):
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.session.modified = True
这是我的cart.py文件...
{% load static %}
{% block title %}
Your Shopping Cart
{% endblock %}
{% block content %}
<div class="container">
<div class="row" style="margin-top: 6%">
<h2>Your Shopping Cart
<span class="badge pull-right">
{% with totail_items=cart|length %}
{% if cart|length > 0 %}
My Shopping Order:
<a href="{% url "cart:cart_detail" %}" style="color: #ffffff">
{{ totail_items }} item {{ totail_items|pluralize }}, Kshs. {{ cart.get_total_price }}
</a>
{% else %}
Your cart is empty.
{% endif %}
{% endwith %}
</span>
</h2>
<table class="table table-striped table-hover">
<thead style="background-color: #5AC8FA">
<tr>
<th>Image</th>
<th>Product</th>
<th>Quantity</th>
<th>Remove</th>
<th>Unit Price</th>
<th>Price</th>
</tr>
</thead>
<tbody>
{% for item in cart %}
{% with product=item.product %}
<tr>
<td>
<a href="{{ product.get__absolute_url }}">
<img src="{% if product.image %} {{ product.image.url }} {% else %} {% static 'img/default.jpg' %} {% endif %}" alt="..." style="height: 130px; width: auto">
</a>
</td>
<td>{{ product.name }}</td>
<td>
<form action="{% url "cart:cart_add" product.id %}" method="post">
{% csrf_token %}
{{ item.update_quantity_form.quantity }}
{{ item.update_quantity_form.update }}
<input type="submit" value="Update" class="btn btn-info">
</form>
</td>
<td>
<a href="{% url "cart:cart_remove" product.id %}">Remove</a>
</td>
<td>kshs. {{ item.price }}</td>
<td>kshs. {{ item.total_price }}</td>
</tr>
{% endwith %}
{% endfor %}
<tr style="background-color: #5AC8FA">
<td><b>Total</b></td>
<td colspan="4"></td>
<td colspan="num"><b>kshs. {{ cart.get_total_price }}</b></td>
</tr>
</tbody>
</table>
<p class="text-right">
<a href="{% url "product_list" %}" class="btn btn-default">Continue Shopping</a>
<a href="" class="btn btn-primary">Checkout</a>
</p>
</div>
</div>
{% endblock %}
这是我的cart / templates / cart中的detail.html页面
<div class="row">
{% for product in products %}
<div class="col-sm-12 col-md-6 col-lg-4 p-b-50">
<!-- Block2 -->
<div class="block2">
<div class="block2-img wrap-pic-w of-hidden pos-relative">
<img src="{{ MEDIA_URL }}{{ product.image.url }}" alt="IMG-PRODUCT" height="290" width="190">
<div class="block2-overlay trans-0-4">
<a href="#" class="block2-btn-addwishlist hov-pointer trans-0-4">
<i class="icon-wishlist icon_heart_alt" aria-hidden="true"></i>
<i class="icon-wishlist icon_heart dis-none" aria-hidden="true"></i>
</a>
<div class="block2-btn-addcart w-size1 trans-0-4">
<!-- Button -->
<form action="{% url "cart:cart_add" product.id %}" method="post">
{% csrf_token %}
{{ cart_product_form }}
<input type="submit" value="add to cart" class="flex-c-m size1 bg4 bo-rad-23 hov1 s-text1 trans-0-4">
</form>
</div>
</div>
</div>
<div class="block2-txt p-t-20">
<a href="" class="block2-name dis-block s-text3 p-b-5">
{{ product.description }}
</a>
<span class="block2-price m-text6 p-r-5">
{{ product.price }}
</span>
</div>
</div>
</div>
{% endfor %}
</div><!--end row-->
这是我的product / detail.html页面，在该页面上列出了我所有的产品，也是我要提交我的产品详细信息并将其添加到购物车的表格和底部。
from django.shortcuts import render, redirect, get_object_or_404
from django.views.decorators.http import require_POST
from product.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('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)
for item in cart:
item['update_quantity_form'] = CartAddProductForm(initial={'quantity': item['quantity'], 'update': True})
return render(request, 'cart/detail.html', {'cart': cart})
# Create your views here.
这是我的cart / views.py文件
from django.conf.urls import url
from . import views
app_name = 'cart'
urlpatterns = [
url(r'^$', views.cart_detail, name='cart_detail'),
url(r'^add/(?P<product_id>\d+)/$', views.cart_add, name='cart_add'),
url(r'^remove/(?P<product_id>\d+)/$', views.cart_remove, name='cart_remove'),
]
这是我的cart / urls.py文件
答案 0 :(得分：0)
您的详细信息页面不起作用，因为您的模板需要products，但是您仅在上下文中传递cart。要解决此问题，只需在呈现模板之前将products添加到上下文中即可。
def cart_detail(request):
cart = Cart(request)
products = []
for item in cart:
item['update_quantity_form'] = CartAddProductForm(initial={'quantity': item['quantity'], 'update': True})
products.append(item)
context = { 'cart': cart }
context['products'] = products
return render(request, 'cart/detail.html', context)