python - Djangoでの送信後にクラスベースのビューでフォームフィールドをクリアする方法

Question

私の Django プロジェクトでは、パスワードのリセットにクラスベースのビューを使用しています。私のフォームには、ユーザーがメールアドレスまたはユーザー名を書き込むことができるフィールドが 1 つしかありません。送信が成功すると、同じページに成功メッセージが表示されます。私の問題は、送信後に空のフィールドが表示されますが、同時にボタンをクリックしてデータを再度送信できることです。送信が成功した後にフォームフィールドをクリアする方法は? 私は少し混乱しています。

ビュー.py

class PasswordResetRequestView(FormView):
    template_name = "registration/password_reset.html"
    success_url = '/account/password_reset'
    form_class = PasswordResetRequestForm

    @staticmethod
    def validate_email_address(email):
        try:
            validate_email(email)
            return True
        except ValidationError:
            return False

    def post(self, request, *args, **kwargs):
        global data
        form = self.form_class(request.POST)
        try:
            if form.is_valid():
                data = form.cleaned_data["email_or_username"]
            if self.validate_email_address(data) is True:
                associated_users = User.objects.filter(Q(email=data) | Q(username=data))
                if associated_users.exists():
                    for user in associated_users:
                        c = {
                            'email': user.email,
                            'domain': request.META['HTTP_HOST'],
                            'site_name': 'your site',
                            'uid': urlsafe_base64_encode(force_bytes(user.pk)),
                            'user': user,
                            'token': default_token_generator.make_token(user),
                            'protocol': 'http',
                        }
                        subject_template_name = 'registration/password_reset_subject.txt'
                        email_template_name = 'registration/password_reset_email.html'
                        subject = loader.render_to_string(subject_template_name, c)
                        subject = ''.join(subject.splitlines())
                        email = loader.render_to_string(email_template_name, c)
                        send_mail(subject, email, DEFAULT_FROM_EMAIL, [user.email], fail_silently=False)
                    result = self.form_valid(form)
                    messages.success(request, 'An email has been sent to ' +
                                     data + ". Please check its inbox to continue reseting password.")
                    return result
                result = self.form_invalid(form)
                messages.error(request, 'No user is associated with this email address')
                return result
            else:
                associated_users = User.objects.filter(username=data)
                if associated_users.exists():
                    for user in associated_users:
                        c = {
                            'email': user.email,
                            'domain': 'example.info',
                            'site_name': 'example',
                            'uid': urlsafe_base64_encode(force_bytes(user.pk)),
                            'user': user,
                            'token': default_token_generator.make_token(user),
                            'protocol': 'http',
                        }
                        subject_template_name = 'registration/password_reset_subject.txt'
                        email_template_name = 'registration/password_reset_email.html'
                        subject = loader.render_to_string(subject_template_name, c)
                        # Email subject *must not* contain newlines
                        subject = ''.join(subject.splitlines())
                        email = loader.render_to_string(email_template_name, c)
                        send_mail(subject, email, DEFAULT_FROM_EMAIL, [user.email], fail_silently=False)
                    result = self.form_valid(form)
                    messages.success(request, 'Email has been sent to ' +
                                     data + "'s email address. Please check its inbox to continue reseting password.")
                    return result
                result = self.form_invalid(form)
                messages.error(request, _('This username does not exist in the system.'))
                return result
        except Exception as e:
            print(e)
        return self.form_invalid(form)