How to delete a content type, programmatically?

Question

I programmatically created a content type during a module installation (using field storage configuration).

I want to delete that content type while uninstalling the module.

Is there any way to do this with Drupal 8?

Answer 1

Just make sure that the node type depends on your your module, then Drupal will delete it automatically for you.

See node.type.book.yml in the book module for an example, this is the relevant part:

dependencies:
  enforced:
    module:
      - book

Note that users will have to delete all content of that type before they can uninstall the module then.

Answer 2

This seems to do it for me.

$content_type = \Drupal::entityManager()->getStorage('node_type')->load('MACHINE_NAME_OF_TYPE');
$content_type->delete();

Answer 3

To trigger some action upon uninstallation of a module you have to implement hook_uninstall in your module's *.install file. Prior to deleting the content type you might want to ensure all nodes of that content type got deleted as well. Finally, after uninstalling the module and having the content type deleted don't forget to export the updated config.

/**
 * Place a short description here. 
 */
function MYMODULE_uninstall() {

  // Delete all nodes of given content type.
  $storage_handler = \Drupal::entityTypeManager()
    ->getStorage('node');
  $nodes = $storage_handler->loadByProperties(['type' => 'MACHINE_NAME_OF_TYPE']);
  $storage_handler->delete($nodes);

  // Delete content type.
  $content_type = \Drupal::entityTypeManager()
    ->getStorage('node_type')
    ->load('MACHINE_NAME_OF_TYPE');
  $content_type->delete();
}