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我創建了一個上下文處理器通過創建一個新的文件到購物車應用程序目錄設置當前車成模板的請求上下文並將其命名爲context_processors.py：ImportError at/cart /;沒有名爲模塊「cart.context_processors」
from .cart import Cart
def cart(request):
return {'cart': Cart(request)}
我添加'cart.context_processors.cart'設置爲TEMPLATES設置的settings.py文件中的'context_processors'選項。這給了我以下錯誤：
Request Method: GET
Request URL: http://127.0.0.1:8000/cart/
Django Version: 1.9.6
Python Version: 3.5.1
Installed Applications:
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'shop',
'cart']
**Traceback:**
File "d:\virEnv\lib\site-packages\django\core\handlers\base.py" in get_response
149. response = self.process_exception_by_middleware(e, request)
File "d:\virEnv\lib\site-packages\django\core\handlers\base.py" in get_response
147. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "D:\virEnv\myshop\cart\views.py" in cart_detail
31. return render(request, 'cart/detail.html', {'cart': cart})
File "d:\virEnv\lib\site-packages\django\shortcuts.py" in render
67. template_name, context, request=request, using=using)
File "d:\virEnv\lib\site-packages\django\template\loader.py" in render_to_string
97. return template.render(context, request)
File "d:\virEnv\lib\site-packages\django\template\backends\django.py" in render
95. return self.template.render(context)
File "d:\virEnv\lib\site-packages\django\template\base.py" in render
204. with context.bind_template(self):
File "c:\python35-32\Lib\contextlib.py" in __enter__
59. return next(self.gen)
File "d:\virEnv\lib\site-packages\django\template\context.py" in bind_template
256. processors = (template.engine.template_context_processors +
File "d:\virEnv\lib\site-packages\django\utils\functional.py" in __get__
33. res = instance.__dict__[self.name] = self.func(instance)
File "d:\virEnv\lib\site-packages\django\template\engine.py" in template_context_processors
105. return tuple(import_string(path) for path in context_processors)
File "d:\virEnv\lib\site-packages\django\template\engine.py" in <genexpr>
105. return tuple(import_string(path) for path in context_processors)
File "d:\virEnv\lib\site-packages\django\utils\module_loading.py" in import_string
20. module = import_module(module_path)
File "d:\virEnv\lib\importlib\__init__.py" in import_module
126. return _bootstrap._gcd_import(name[level:], package, level)
Exception Type: ImportError at /cart/
Exception Value: No module named 'cart.context_processors'
這是我的車\ views.py文件：
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('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})
這是我base.html文件文件：
{% load static %}
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>{% block title %}My shop{% endblock %}</title>
<link href="{% static "css/base.css" %}" rel="stylesheet">
</head>
<body>
<div id="header">
<a href="/" class="logo">My shop</a>
</div>
<div id="subheader">
<div class="cart">
{% with total_items=cart|length %}
{% if cart|length > 0 %}
Your cart:
<a href="{% url "cart:cart_detail" %}">
{{ total_items }} item{{ total_items|pluralize }},
${{ cart.get_total_price }}
</a>
{% else %}
Your cart is empty.
{% endif %}
{% endwith %}
</div>
</div>
<div id="content">
{% block content %}
{% endblock %}
</div>
</body>
</html>
請告訴我。
編輯：
佈局：
cart.py：
回溯：
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 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 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 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 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 __len__(self):
"""
Count all 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):
# remove cart from session
del self.session[settings.CART_SESSION_ID]
self.session.modified = True
cart.context_processors前加入我的項目名稱後的新回溯：
File "d:\virEnv\lib\site-packages\django\core\handlers\base.py" in get_response
149. response = self.process_exception_by_middleware(e, request)
File "d:\virEnv\lib\site-packages\django\core\handlers\base.py" in get_response
147. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "D:\virEnv\myshop\shop\views.py" in product_list
16. 'products': products})
File "d:\virEnv\lib\site-packages\django\shortcuts.py" in render
67. template_name, context, request=request, using=using)
File "d:\virEnv\lib\site-packages\django\template\loader.py" in render_to_string
97. return template.render(context, request)
File "d:\virEnv\lib\site-packages\django\template\backends\django.py" in render
95. return self.template.render(context)
File "d:\virEnv\lib\site-packages\django\template\base.py" in render
204. with context.bind_template(self):
File "c:\python35-32\Lib\contextlib.py" in __enter__
59. return next(self.gen)
File "d:\virEnv\lib\site-packages\django\template\context.py" in bind_template
256. processors = (template.engine.template_context_processors +
File "d:\virEnv\lib\site-packages\django\utils\functional.py" in __get__
33. res = instance.__dict__[self.name] = self.func(instance)
File "d:\virEnv\lib\site-packages\django\template\engine.py" in template_context_processors
105. return tuple(import_string(path) for path in context_processors)
File "d:\virEnv\lib\site-packages\django\template\engine.py" in <genexpr>
105. return tuple(import_string(path) for path in context_processors)
File "d:\virEnv\lib\site-packages\django\utils\module_loading.py" in import_string
20. module = import_module(module_path)
File "d:\virEnv\lib\importlib\__init__.py" in import_module
126. return _bootstrap._gcd_import(name[level:], package, level)
Exception Type: ImportError at/
Exception Value: No module named 'myshop.cart'
你可以顯示你的項目的佈局，特別是'購物車'應用程序。 – Alasdair
我添加了包含購物車應用的總佈局。請參閱圖片 – ohid
仍然不起作用 – ohid