我正在写一个基于Django 3 By Example第三版的在线商店。我在付款部分遇到了一个关于这本书的代码的问题，我搜索了互联网并更新了一些代码，但我仍然有一个问题！在填写借记卡表格后，当我点击“立即付款！”按钮时，我没有被重定向到Don页面！
process.html

{% extends "shop/base.html" %}

{% block title %} Pay by credit card {% endblock %}

{% block sidenavigation %}

{% endblock %}

{% block content %}
    

## Pay by credit card

 

{% endblock %}

进程视图：

def payment_process(request):
"""The view that processes the payment"""
order_id = request.session.get('order_id')

order = get_object_or_404(Order, id=order_id)

total_cost = order.get_total_cost()
print(f'ORDER=== {order.first_name}')

if request.method == 'POST':
    print('---------Post------------')
    # retrieve nonce
    # retrieve nonce
    nonce = request.POST.get('paymentMethodNonce', None)

    # # create User
    customer_kwargs = {
        # "customer_id": order.braintree_id
        "first_name": order.first_name,
        "last_name": order.last_name,
        "email": order.email
    }
    customer_create = gateway.customer.create(customer_kwargs)
    customer_id = customer_create.customer.id

    # create and submit transaction

    result = gateway.transaction.sale({
        'amount': f'{total_cost:.2f}',
        'payment_method_nonce': nonce,
        'options': {
            'submit_for_settlement': True
        }
    })

    print(f'Result----{result}')
    if result.is_success:
        # mark the order as paid
        print(f'------Success----')

        order.paid = True

        # store the unique transaction id
        order.braintree_id = result.transaction.id
        order.save()

        return redirect('payment:done')
    else:
        return redirect('payment:canceled')
else:
    print('---------Get----------')
    # generate token
    client_token = gateway.client_token.generate()

    return render(
        request,
        'payment/process.html',
        {
            'order': order,
            'client_token': client_token
        }
    )