Create taxonomy terms from content type field

Question

I'm looking to add a taxonomy term to a vocabulary upon the creation of content type.

For example I have a taxonomy vocabulary called "Widget Type".

I have a content type of Product. When I create an instance of product I would like the title (product.title_1) to be added as a taxonomy term to Widget Type.

Then every time a new product is created a term is added. Widget Type would then contain the terms... title_1 title_2...etc.

Does this require a custom module or is there an easier way to do this that I'm not aware of?

Thanks

Answer 1

You can trigger this behavior by implementing hook_entity_presave() in a custom module. Inside of this hook, you will call a function which creates each time the taxonomy term using the title of the node created.

test.module

use Drupal\Core\Entity\EntityInterface;

/**
 * Implements hook_entity_presave().
 */
function test_entity_presave(EntityInterface $entity) {
   if ($entity->bundle() == 'product') {
    if ($entity->isNew()) {
      $title = $entity->get('title')->getValue();
      \Drupal\test\Test::createTerm($title[0]['value']);
    }
  }
}

Assuming you have defined createTerm() in a Test class…

Test.php (in the src folder)

namespace Drupal\test;

/**
 * Test class.
 */
class Test {
  public static function createTerm($title) {
    $term = [
      'name'     => $title,
      'vid'      => 'widget_type',
      'langcode' => 'en',
    ];
    $term = \Drupal::entityTypeManager()->getStorage('taxonomy_term')->create($term);
    $term->save();
  }
}