I have class named Book.

class Popups
  private $entityQuery;
  private $entityTypeManager;

  public function __construct(QueryFactory $entityQuery, EntityTypeManagerInterface $entity_type_manager) {
    $this->entityQuery = $entityQuery;
    $this->entityTypeManager = $entity_type_manager;

public function read($cid)
    $nodes = $this->entityTypeManager->getStorage('node')->loadByProperties(['type' => 'book', 'cid' => $cid ]);

    return $nodes;


Now I have books.module file where I need to call read method; how to call that method

$book = new Book();  // what param should i pass here
  • Why not add the class to mymodule.services.yml and inject the core services there?
    – 4uk4
    Sep 3, 2019 at 12:18
  • That won’t work because the constructor is expecting arguments. Register this class as a service, and call it with \Drupal::service() instead.
    – Kevin
    Sep 3, 2019 at 12:19
  • @4k4 there are some database related queries written in read function with searvices and in .module file I only need to call that read method.
    – mintra
    Sep 3, 2019 at 12:20
  • 1
    I don't understand why database queries would be a reason not to use a service.
    – 4uk4
    Sep 3, 2019 at 12:31

1 Answer 1


Add the class to mymodule.services.yml and inject the core services there:


    class: Drupal\mymodule\Book
    arguments: ['@entity.query', '@entity_type.manager']

Then use the service in procedural code:

  • I don't wish to in this way my question was how to call controller function in module
    – mintra
    Sep 3, 2019 at 12:53
  • At the moment the function is not a controller. However, if you want to add a controller method to the class, you can do this in a service as well, see drupal.org/docs/8/api/routing-system/structure-of-routes. Which is IMHO a better way for dependency injection anyway, and you can use the service resources in multiple places, without the need to create multiple instances.
    – 4uk4
    Sep 3, 2019 at 12:59
  • I don't wish to in this way this is how its done, you don't new Class() anything in procedural - this will resolve dependencies and take care of instantiation for you.
    – Kevin
    Sep 3, 2019 at 15:42
  • You may not want to do it this way, but you've come on a Drupal QA site and asked a Drupal question, to which you've been given a Drupal answer. If you want a non-Drupal way, you're likely on your own to find a solution.
    – Jaypan
    Sep 3, 2019 at 22:28

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