Programmatically find out field name of an Id-field

informatik-handwerk.de

5/5/23, 12:49 PM

Depending on the type of entity, it is either nid/vid/uid and possibly other. It is nice to have an ->id() method which allows you to work with data in an uniform fashion without relying on those details, but there are quite some use-cases, where I am running into troubles.

Just an example, getting list of revision ids for an generic entity seems not possible without knowing the name of the id-field.

$entityTypeId = $entity->getEntityTypeId();
$entityId = $entity->id();

$typeStorage = \Drupal::entityTypeManager()->getStorage($entityTypeId);

$query = $typeStorage->getQuery();
$query->allRevisions();
$query->condition("??????", $entityId);

0 + 0

entities

Clive

5/5/23, 1:13 PM

Can't test it at the moment but try `$id_field = $entity->getKey('id');`

Score:3

Drupal

Paul

5/5/23, 1:43 PM

EntityType provides a function to get field keys: EntityType::getKeys. The result is an array and the id key identifies the property name of the primary field.

See https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Entity%21EntityType.php/function/EntityType%3A%3AgetKeys

0 + 0

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Programmatically find out field name of an Id-field

TH: Programmatically find out field name of an Id-field

RO: Programmatically find out field name of an Id-field

RU: Programmatically find out field name of an Id-field

VI: Programmatically find out field name of an Id-field

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.