Django 来自mandrill服务器的奇怪响应

我有一个django应用程序，我使用mandrill发送邮件。 直到最近，我一直在发送简单的邮件，效果很好。 但是现在，我想发送带有附件的邮件，所以我更改了我的邮件 对此的解释：

def construct_message(self):
        content = self.get_content()
        attachments = self.kwargs.get('attachments', None)
        message = {} if not attachments else MIMEMultipart()
        message['subject'] = content['subject']
        message['text'] = content['txt']
        message['html'] = content['html']
        message['from_email'] = self.sender
        message['from_name'] = '***'
        recipients = self._get_recipients()
        if attachments:
            message['to'] = ", ".join([r["email"] for r in recipients])
        else:
            message['to'] = recipients
        message['cc'] = []
        message['bcc'] = []
        if attachments:
            for a in attachments:
                part = MIMEApplication(open(a,"rb").read())
                Encoders.encode_base64(part)
                part.add_header('Content-Disposition', 'attachment; filename="%s"' % os.path.basename(a))
                message.attach(part)
            message = message.as_string()
        return message

def send_message(self, message):
        """Actually send the message."""
        api_key = settings.MANDRILL_API_KEY_INTERNAL if self.is_internal else settings.MANDRILL_API_KEY_EXTERNAL
        key_type_str = "internal" if self.is_internal else "external"
        logging.debug("Sending mail through %s API key %s" % (key_type_str, api_key))
        mandrill_client = mandrill.Mandrill(api_key)
        return mandrill_client.messages.send(message=message)

从那以后，我从mandrill API调用中得到以下响应：

验证错误：验证错误：{“消息”：“请输入数组”}

你知道我做错了什么吗？

---

谢谢，Alex A.

在我的通知类的init中，你在哪里调用

send_message

？def_uuinit_uuu（self，recipients，Notification_type=None，sender=None，**kwargs）：。。。self.send_message（self.construct_message（））