Drupal 8: delete all nodes of the same type

Question

I have a need to remove all nodes of the same type in Drupal 8 (there are over 7k of nodes).

It wouldn't be a problem for Drupal 7 (DB query + node_delete or node_delete_multiple would have solved my issue). However, D8 is slightly different :)

Please, advice, how can I do it. Thanks in advance!

Answer 1

One should use entity queries instead of acting directly on the database:

  $result = \Drupal::entityQuery('node')
      ->condition('type', 'my_content_type_name')
      ->execute();
  entity_delete_multiple('node', $result);

Setting up ranges like in the other answer shouldn't be too difficult.

See EntityFieldQuery has been rewritten for more information.

Answer 2

you can use the Devel module

1. go to Admin->configuration->development->Generate content
   ( admin/config/development/generate/content )
2. select the content type you wish to delete its nodes.
3. check "delete all content in these content types.." (important)
4. put "0" in "how many nodes would you like to generate" (important)

see attached image for instructions.

attached image

Answer 3

The entity_delete_multiple is deprecated as of Drupal 8.0.x, will be removed before Drupal 9.0.0. Use the entity storage's delete() method to delete multiple entities:

// query all entities you want for example taxonomy term from tags vocabulary
$query = \Drupal::entityQuery('taxonomy_term');
$query->condition('vid', 'tags');
$tids = $query->execute();

$storage_handler = \Drupal::entityTypeManager()->getStorage($entity_type);
$entities = $storage_handler->loadMultiple($tids);
$storage_handler->delete($entities);

Answer 4

Well, the answer lies on the surface:

$types = array('my_content_type_name');

$nids_query = db_select('node', 'n')
->fields('n', array('nid'))
->condition('n.type', $types, 'IN')
->range(0, 500)
->execute();

$nids = $nids_query->fetchCol();

entity_delete_multiple('node', $nids);

I advice you to use "range" and some sort of "batch" (or just re-run the code multiple times), because it's a very fat operation (500 nodes per operation is ok for 256MB).

To execute this code you can either write custom module OR use the devel module: https://www.drupal.org/project/devel

After installation go to yoursite_address/devel/php and execute php code there.