我不明白为什么我的代码无法正常工作。在此之前，但现在，当我运行服务器并进行测试时，代码不起作用。

用户注册时，我向他发送激活电子邮件，如下所示：

def send_activation_email(serializer, request, user):
    current_site = get_current_site(request)
    message = render_to_string('acc_active_email.html', {
        'user': user,
        'domain': current_site.domain,
        'uid': urlsafe_base64_encode(force_bytes(user.pk)),
        'token': account_activation_token.make_token(user),
    })
    mail_subject = 'Activate your blog account.'
    to_email = serializer.data['email']

    email = EmailMessage(mail_subject, message, to=[to_email])
    email.send()

acc_active_email.html

{% autoescape off %}
Hi {{ user.username }},
Please click on the link to confirm your registration,

http://{{ domain }}{% url 'activate' uidb64=uid token=token %}
{% endautoescape %}

和我的网址文件

.
.
    url(r'^activate/(?P<uidb64>[0-9A-Za-z_\-]+)/(?P<token>[0-9A-Za-z]{1,13}-[0-9A-Za-z]{1,20})/$',
        views.activate_account, name='activate'),
.
.

但是我有这个错误：

Exception Type:     NoReverseMatch
Exception Value:    

Reverse for 'activate' with keyword arguments '{'uidb64': b'NDM', 'token': '4qz-8f770502bd8b02786da9'}' not found. 1 pattern(s) tried: ['activate/(?P<uidb64>[0-9A-Za-z_\\-]+)/(?P<token>[0-9A-Za-z]{1,13}-[0-9A-Za-z]{1,20})/$']

突出显示此行 http://{{ domain }}{% url ‘activate’ uidb64=uid token=token %}