Qfyilyi

I'm currently working on trying to build an email html template using swift mailer. My problem right now is how can I customize the template to fetch the values from the nodes and render them in the email template. Fetch and print/render the node values only from the nodes that will be sent as shown in the screenshot below.

Swift mailer has a default way to output the values from all the fields using {{ body }}

Is there a way I could access the values from the fields and render them on the template. Something like the code below that works on node template

{{content.field_title.value}} or {{node.field_title.value}}

Swift mailer has a way to render values via preprocess but I can't seem to make it work. Below is the code that is a work in progress

https://www.drupal.org/node/1590184

function swiftmailer_preprocess_swiftmailer(&$variables) {

    $variables['node_title'] = $node->getTitle();

}

function swiftmailer_preprocess_swiftmailer(&$variables) {

    // Don't forget to use the Node class on top of your .module or .theme file.

    $node = Node::load(YourNodeId); // Here add your node id. If you don't want it to be hardcoded I would suggest you to create a config page for it. The other way is to put a checkbox in it and then find it here with a query.

    $variables['node_title'] = $node->getTitle();

}

After you do this in your swiftmailer.html.twig you will be able to render the node title like so {{ node_title }}

@clestcruz, Preprocess is good option for this. But You can create service as well for this.

Create custom module named as foo .
Create all required files and then create foo.services.yml .
mention service like :

services:

  foo.twig.TwigExtension:

    class: DrupalfooXYZ

    tags:

      - {name: twig.extension}

create service file in foo/src/XYZ.php

<?php

namespace Drupalfoo;

use DrupalblockEntityBlock;

use DrupaluserEntityUser;

use DrupalnodeEntityNode;

use DrupaltaxonomyEntityTerm;

use DrupalparagraphsEntityParagraph;

use DrupalCoreUrl;



/**

 * Class DefaultService.

 *

 * @package Drupalfoo

 */

class XYZ extends Twig_Extension {



  /**

   * {@inheritdoc}

   * This function must return the name of the extension. It must be unique.

   */

  public function getName() {

    return 'product_listing_extend_display';

  }



  /**

   * In this function we can declare the extension function.

   */

  public function getFunctions() {

    return array(

      'getData' => new Twig_Function_Method( $this, 'getData', array('is_safe' => array('html'))),

    );

  }



// Function to get tax childs by tid

  function getData($id) {

    // query for data 

   // return value

  }



}

Call method {{ getData() }} in twig file.