Django 实现购物车功能的示例代码

SESSION_EXPIRE_AT_BROWSER_CLOSE = True

pip install django-cart

url(r'^cart/$', views.cart),
url(r'^additem/(\d+)/(\d+)/$', views.add_to_cart, name='additem-url'),
url(r'^removeitem/(\d+)/$', views.remove_from_cart, name='removeitem-url'),

from cart.cart import Cart
def add_to_cart(request, product_id, quantity):
 product = models.Product.objects.get(id=product_id)
 cart = Cart(request)
 cart.add(product, product.price, quantity)
 return redirect('/')

def remove_from_cart(request, product_id):
 product = models.Product.objects.get(id=product_id)
 cart = Cart(request)
 cart.remove(product)
 return redirect('/cart/')

@login_required
def cart(request):
 all_categories = models.Category.objects.all()
 cart = Cart(request)
 template = get_template('cart.html')
 html = template.render(context=locals(), request=request)
 return HttpResponse(html)

<!-- cart.html (mshop project) -->
{% extends "base.html" %}
{% block title %}查看购物车{% endblock %}
{% block content %}
<div class='container'>
{% for message in messages %}
 <div class='alert alert-{{message.tags}}'>{{ message }}</div>
{% endfor %}
 <div class='row'>
  <div class='col-md-12'>
   <div class='panel panel-default'>
    <div class='panel-heading' align=center>
     <h3>欢迎光临迷你小电商</h3>
      {% if user.socialaccount_set.all.0.extra_data.name %}
       {{user.socialaccount_set.all.0.extra_data.name}}<br/>
       <img src='{{user.socialaccount_set.all.0.get_avatar_url}}' width='100'>
      {% else %}
       Welcome: {{ user.username }}
      {% endif %}
    </div>
   </div>
  </div>
 </div>
 <div class='row'>
  <div class='col-sm-12'>
   <div class='panel panel-info'>
    <div class='panel panel-heading'>
     <h4>我的购物车</h4>
    </div>
    <div class='panel panel-body'>
     {% for item in cart %}
     {% if forloop.first %}
     <table border=1>
      <tr>
       <td width=300 align=center>产品名称</td>
       <td width=100 align=center>单价</td>
       <td width=100 align=center>数量</td>
       <td width=100 align=center>小计</td>
       <td width=100 align=center>删除</td>
      </tr>
     {% endif %}
      <div class='listgroup'>
       <div class='listgroup-item'>
        <tr>
         <td>{{ item.product.name }}</td>
         <td align=right>{{ item.product.price }}</td>
         <td align=center>{{ item.quantity }}</td>
         <td align=right>{{ item.total_price }}</td>
         <td align=center>
          <a href='{% url "removeitem-url" item.product.id %}'><span class='glyphicon glyphicon-trash'></span></a>
         </td>
        </tr>
       </div>
      </div>
     {% if forloop.last %}
     </table>
     <button class='btn btn-warning'><a href='/order'>我要订购</a></button>
     {% endif %}
     {% empty %}
      <em>购物车是空的</em>
     {% endfor %}
    </div>
    <div class='panel panel-footer'>
     总计：{{ cart.summary }}元
    </div>
   </div>
  </div>
 </div>
</div>
{% endblock %}