使用braintree，Django时，错误类型对象“配置”没有属性“环境”

问题描述

我正在尝试通过 Antiono Mele 撰写的“Django 3 by example”一书学习 Django，但在使用 Braintree 时遇到沙盒环境配置问题。在他们的页面上写着：

gateway = braintree.BraintreeGateway(
  braintree.Configuration(
    environment=braintree.Environment.SandBox,merchant_id='**********',public_key='**********',private_key='**********'
  )
)

和书中的完全一样。当我尝试付款时错误类型对象“配置”没有“环境”属性。我不知道为什么会出现错误。我检查了我使用的应用程序的版本，它们与书中的版本匹配（Pillow==7.0.0.,Django==3.1.8,celery==4.4.2,braintree= =3.59.0）。下面我放了需要的代码。

付款/views.py

import braintree
from django.shortcuts import render,redirect,get_object_or_404
from orders.models import Order




gateway = braintree.BraintreeGateway(
  braintree.Configuration(
    environment=braintree.Environment.SandBox,private_key='**********'
  )
)
# Utworzenie egzemplarza bramki płatności Braintree.


def payment_process(request):
    order_id = request.session.get('order_id')
    order = get_object_or_404(Order,id=order_id)
    if request.method == 'POST':
        # Pobranie tokena nonce.
        nonce = request.POST.get('payment_method_nonce',None)
        # Utworzenie i przesłanie transakcji.
        result = braintree.Transaction.sale({
            'amount': '{:.2f}'.format(order.get_total_cost()),'payment_method_nonce': nonce,'options': {
            'submit_for_settlement': True
            }
        })
        if result.is_success:
            # Oznaczenie zamówienia jako opłacone.
            order.paid = True
            # Zapisanie unikatowego identyfikatora transakcji.
            order.braintree_id = result.transaction.id
            order.save()
            return redirect('payment:done')
        else:
            return redirect('payment:canceled')

    else:
        # Wygenerowanie tokena.
        client_token = braintree.ClientToken.generate()
        return render(request,'payment/process.html',{'order': order,'client_token': client_token})


def payment_done(request):
    return render(request,'payment/done.html')

def payment_canceled(request):
    return render(request,'payment/canceled.html') ```

myshop/urls.py

from django.contrib import admin
from django.urls import path,include
from django.conf import settings
from django.conf.urls.static import static

urlpatterns = [
    path('admin/',admin.site.urls),path('cart/',include('cart.urls',namespace='cart')),path('orders/',include('orders.urls',namespace='orders')),path('payment/',include('payment.urls',namespace='payment')),path('',include('shop.urls',namespace='shop')),]
if settings.DEBUG:
    urlpatterns += static(settings.MEDIA_URL,document_root=settings.MEDIA_ROOT)

payment/templates/payment/process.html

{% extends "shop/base.html" %}
{% block title %}Zapłać kartą kredytową{% endblock %}
{% block content %}
<h1>Zapłać kartą kredytową</h1>
<form action="." id="payment" method="post">
<label for="card-number">Numer karty</label>
<div id="card-number" class="field"></div>
<label for="cvv">CVV</label>
<div id="cvv" class="field"></div>
<label for="expiration-date">Data ważności</label>
<div id="expiration-date" class="field"></div>
<input type="hidden" id="nonce" name="payment_method_nonce" value="">
{% csrf_token %}
<input type="submit" value="Pay">
</form>
<!-- Załadowanie wymaganych komponentów klienta. -->
<script
src="https://js.braintreegateway.com/web/3.29.0/js/client.min.js"></script>
<!-- Załadowanie komponentu Hosted Fields. -->
<script src="https://js.braintreegateway.com/web/3.29.0/js/hosted-fields.min.js"></script>
<script>
var form = document.querySelector('#payment');
var submit = document.querySelector('input[type="submit"]');
braintree.client.create({
authorization: '{{ client_token }}'
},function (clientErr,clientInstance) {
if (clientErr) {
console.error(clientErr);
return;
}
braintree.hostedFields.create({
    client: clientInstance,styles: {
'input': {'font-size': '13px'},'input.invalid': {'color': 'red'},'input.valid': {'color': 'green'}
},fields: {
number: {selector: '#card-number'},cvv: {selector: '#cvv'},expirationDate: {selector: '#expiration-date'}
}
},function (hostedFieldsErr,hostedFieldsInstance) {
if (hostedFieldsErr) {
console.error(hostedFieldsErr);
return;
}
submit.removeAttribute('disabled');
form.addEventListener('submit',function (event) {
    event.preventDefault();
hostedFieldsInstance.tokenize(function (tokenizeErr,payload) {
if (tokenizeErr) {
console.error(tokenizeErr);
return;
}
// Ustawienie tokena nonce w celu przesłania na serwer.
document.getElementById('nonce').value = payload.nonce;
// Przesłanie formularza.
document.getElementById('payment').submit();
});
},false);
});
});
</script>
{% endblock %}

最好的问候。

解决方法

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