Magento 2.2.11 - How to add attachment to an email, Call to undefined method Magento\Framework\Mail\Message\Interceptor::createAttachment() error

Question

I have installed the pdf invoice Extension in Magento 2.2.11. I'm getting this error while placing the order,

Call to undefined method Magento\Framework\Mail\Message\Interceptor::createAttachment() in /app/code/MyVendor/PdfInvoice/Model/TransportBuilder.php:19

MyVendor/PdfInvoice/Model/TransportBuilder.php

<?php 
namespace MyVendor\PdfInvoice\Model;
class TransportBuilder extends \Magento\Framework\Mail\Template\TransportBuilder
{
 /**
 * @param Api\AttachmentInterface $attachment
 */
 public function addAttachment($pdfString, $type = '')
 {
 $fileattached = @file_get_contents($pdfString);
 $this->message->createAttachment(
 $fileattached,
 'application/pdf',
 \Zend_Mime::DISPOSITION_ATTACHMENT,
 \Zend_Mime::ENCODING_BASE64,
 $type.'.pdf'
 );
 return $this;
 }
 /**
 * clear header
 * @param $headername
 */
 public function clearHeader($headerName)
 {
 if (isset($this->_headers[$headerName])) {
 unset($this->_headers[$headerName]);
 }
 return $this;
 }
}

When I replace this below code,

$this->message->createAttachment(
 $fileattached,
 'application/pdf',
 \Zend_Mime::DISPOSITION_ATTACHMENT,
 \Zend_Mime::ENCODING_BASE64,
 $type.'.pdf'
 );

with this code

$attachment = new \Zend\Mime\Part($fileattached);
 $attachment->type = 'application/pdf';
 $attachment->disposition = \Zend_Mime::DISPOSITION_ATTACHMENT;
 $attachment->encoding = \Zend_Mime::ENCODING_BASE64;
 $attachment->filename = $type.'.pdf';
 return $attachment;

Emails are sending but the attachment is not included in the mail.

I have tried the below solution but didn't work.

Magento 2.3 custom email attachment not working

https://github.com/mageplaza/magento-2-email-attachments/issues/4

Let me know if anyone has any ideas.

• Riccardo Ugolini: maybe this link can help you: magento.stackexchange.com/questions/318627/… if you have any question ask here in comments
• Msquare: try this magento.stackexchange.com/q/104044
• Mohit Rane: @Msquare I have added the code like this nimbusweb.me/nimbus-screenshots/… it's showing error nimbusweb.me/nimbus-screenshots/…

Answer 1

Finally, I have figured it out. I made it work in Magento 2.2.11. I Had to make some changes to the TransportBuilder.php file.

Followed this link https://magento.stackexchange.com/a/274723/73212 and now it's working.

TransportBuilder.php

<?php
namespace MyVendor\PdfInvoice\Model;
use Magento\Framework\Mail\MessageInterface;
use Magento\Framework\Mail\MessageInterfaceFactory;
use Magento\Framework\Mail\Template\FactoryInterface;
use Magento\Framework\Mail\Template\SenderResolverInterface;
use Magento\Framework\Mail\TransportInterfaceFactory;
use Magento\Framework\ObjectManagerInterface;
use Zend\Mime\Mime;
use Zend\Mime\Part as MimePart;
use Zend\Mime\PartFactory as MimePartFactory;
use Zend\Mime\Message as MimeMessage;
use Zend\Mime\MessageFactory as MimeMessageFactory;
class TransportBuilder extends \Magento\Framework\Mail\Template\TransportBuilder
{
 /** @var MimePart[] */
 private $parts = [];
 /** @var MimeMessageFactory */
 private $mimeMessageFactory;
 /** @var MimePartFactory */
 private $mimePartFactory;
 public function __construct(
 FactoryInterface $templateFactory,
 MessageInterface $message,
 SenderResolverInterface $senderResolver,
 ObjectManagerInterface $objectManager,
 TransportInterfaceFactory $mailTransportFactory,
 MimePartFactory $mimePartFactory,
 MimeMessageFactory $mimeMessageFactory,
 MessageInterfaceFactory $messageFactory = null
 ) {
 parent::__construct(
 $templateFactory,
 $message,
 $senderResolver,
 $objectManager,
 $mailTransportFactory,
 $messageFactory
 );
 $this->mimePartFactory = $mimePartFactory;
 $this->mimeMessageFactory = $mimeMessageFactory;
 }
 protected function prepareMessage()
 {
 parent::prepareMessage();
 $mimeMessage = $this->getMimeMessage($this->message);
 foreach ($this->parts as $part) {
 $mimeMessage->addPart($part);
 }
 $this->message->setBody($mimeMessage);
 return $this;
 }
 public function addAttachment($body, $type = '')
 {
 $fileattached = @file_get_contents($body);
 $mimeType = 'application/pdf';
 $disposition = Mime::DISPOSITION_ATTACHMENT;
 $encoding = Mime::ENCODING_BASE64;
 $this->parts[] = $this->createMimePart($fileattached, $mimeType, $disposition, $encoding, $type.'.pdf');
 return $this;
 }
 private function createMimePart(
 $content,
 $mimeType = 'application/pdf',
 $disposition = Mime::DISPOSITION_ATTACHMENT,
 $encoding = Mime::ENCODING_BASE64,
 $filename = null
 ) {
 /** @var MimePart $mimePart */
 $mimePart = $this->mimePartFactory->create(['content' => $content]);
 $mimePart->setType($mimeType);
 $mimePart->setDisposition($disposition);
 $mimePart->setEncoding($encoding);
 $mimePart->setFileName($filename);
 if ($filename) {
 $mimePart->setFileName($filename);
 }
 return $mimePart;
 }
 private function getMimeMessage(MessageInterface $message)
 {
 $body = $message->getBody();
 if ($body instanceof MimeMessage) {
 return $body;
 }
 /** @var MimeMessage $mimeMessage */
 $mimeMessage = $this->mimeMessageFactory->create();
 if ($body) {
 $mimePart = $this->createMimePart($body, 'application/pdf', Mime::DISPOSITION_ATTACHMENT);
 $mimeMessage->setParts([$mimePart]);
 }
 return $mimeMessage;
 }
 /**
 * clear header
 * @param $headername
 */
 public function clearHeader($headerName)
 {
 if (isset($this->_headers[$headerName])) {
 unset($this->_headers[$headerName]);
 }
 return $this;
 }
}