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RepublicOfDavid avatar Drupal

Programmatically verify a taxonomy term has been added to a node

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RepublicOfDavid

I'm currently checking the node type and status, using the following code.

$query = \Drupal::entityQuery('node')
  ->condition('status', 1)
  ->condition('type', 'content_page')
  ->execute();

foreach ($query as $nid) {
  // …
}

I need to know whether a taxonomy term has been added to a node. I don't need to know the name or ID of that term, which is a taxonomy term from the Group Required vocabulary.

What code should I use to achieve this?

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sonfd avatar Drupal
in flag
sonfd

Since you know that your tag will always be in one specific field, you can use the exists() method on your query to only fetch ids of entities where that field has a value, i.e. is not empty.

For example:

$entity_ids = \Drupal::entityTypeManager()
  ->getStorage('node')
  ->getQuery()
  ->condition('type', 'content_page')
  ->condition('status', 1)
  // Check if field has a non empty value
  ->exists('MY_TAXONOMY_REF_FIELD')
  // exists('MY_FIELD') is equivalent to condition('MY_FIELD', NULL, 'IS NOT NULL')
  ->execute();

Then, load your entities:

$entities = \Drupal::entityTypeManager()
  ->getStorage('node')
  ->loadMultiple($entity_ids);
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RepublicOfDavid avatar
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RepublicOfDavid
Brilliant, works a treat, many thanks sonfd :-)
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