Query webform submissions

Question

I'm attempting to perform a query on webform submissions so I can display all submissions submitted by a specific user. However I'm not sure how to make this query. I made a guess that webform submissions were nodes themselves and performed a query like this

    $query = \Drupal::entityQuery('node')
        ->condition('type', 'webform');
    $nids = $query->execute();
    die(print_r($nids));

But it produced no results. Is there a way I can perform a query on webform submissions so that I can select all submissions authored by a specific user?

UPDATE: Looking through the webform module, I did see some code querying submissions.

$query = $this->getQuery();
$query->condition('webform_id', $webform->id());
$query->condition('in_draft', FALSE);
$query->range(0, 1);

This is exactly the kind of query I want to perform but when I try to use getQuery() I get

Call to undefined function Drupal\my_module\my_helper_class\getQuery()

I understand how to start entity queries for nodes like this

 \Drupal::entityQuery('node')

But is there a way to start an entity query without specifying the entity type? Or is there a way to find out what kind of entity type webform queries are?

Answer 1

Webform submissions are content entities, so something like this should work:

$query = \Drupal::entityQuery('webform_submission')
    ->condition('uid', $uid)
    ->accessCheck(FALSE);
$result = $query->execute();

Answer 2

Remember to include accessCheck(FALSE) or you won't get any result.

$query = \Drupal::entityQuery('webform_submission')
    ->condition('uid', $uid)
    ->accessCheck(FALSE);
$result = $query->execute();