我正在开发一个 Django 博客，并为详细信息页面实现了类别。我偶然发现了一个问题。
我创建了一个 forms.py 文件，以便将商品添加到购物车，这是以下代码。
cart/forms.py 文件
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/views.py代码文件
from django.shortcuts import render, redirect, get_object_or_404
from django.views.decorators.http import require_POST
from myshop.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})
我使用以下代码来显示已在产品页面中创建的表单
<form action="{% url "cart:cart_add" product.id %}" method="post">
{{ cart_product_form }}
{% csrf_token %}
<input type="submit" value="Add to cart">
</form>
这是我放置代码的myshop/templates/product/detail.html文件
{% extends "shop/base.html" %}
{% load static %}
{% block title %}
{% if category %}{{ category.title }}{% else %}Products{% endif %}
{% endblock %}
{% block content %}
<div class="product-detail">
<img src="{% if product.image %}{{ product.image.url }}{% else %}{% static "img/no_image.png" %}{% endif %}">
<h1>{{ product.name }}</h1>
{% for category in product.category.all %}
<h3><a href="{{ category.get_absolute_url }}">{{ category }}</a>{% if not forloop.last %}, {% endif %}</h3>
{% endfor %}
<p class="price">${{ product.price }}</p>
<form action="{% url "cart:cart_add" product.id %}" method="post">
{{ cart_product_form }}
{% csrf_token %}
<input type="submit" value="Add to cart">
</form>
{{ product.description|linebreaks }}
</div>
{% endblock %}
这是myshop/views.py文件
from django.shortcuts import render, get_object_or_404
from .models import Category, Product
from cart.forms import CartAddProductForm
# Create your views here.
def product_list(request, category_slug=None):
category = None
categories = Category.objects.all()
products = Product.objects.filter(available=True)
if category_slug:
category = get_object_or_404(Category, slug=category_slug)
products = products.filter(category=category)
return render(request, 'shop/product/list.html', {'category': category, 'categories': categories, 'products': products})
def product_detail(request, product_slug):
product = get_object_or_404(Product, slug=product_slug, available=True)
cart_product_form = CartAddProductForm()
return render(request, 'shop/product/detail.html', {'product': product}, {'cart_product_form': cart_product_form})
我遵循了 Django by Example book 中的教程。
我错过了什么吗？
编辑
没有数量输入做订单
请您参考如下方法:
您将上下文传递给 render 的方式是错误的 - 您需要将所有上下文变量传递到一个字典中，但您已经传递了两个单独的字典:
def product_detail(request, product_slug):
# ...
return render(request, 'shop/product/detail.html',
{'product': product}, {'cart_product_form': cart_product_form})
# ^ This is wrong
将其更改为:
def product_detail(request, product_slug):
# ...
return render(
request,
'shop/product/detail.html',
{'product': product, 'cart_product_form': cart_product_form}
)
