ORM search empty is null

[item]

Hi,
what is the code for search "empty" aor "IS NULL" with ORM ?

$accountList = $entityManager->getRepository('Account')->where([
    'type' => ''
])->find(); 

Thanks in advance

[dimyy]

'OR' => [
['assignedUserId' => null],
['assignedUserId' => '']
]

Field without default value is null when entity created.
Value is '' when you clear field

[yuri]

> Value is '' when you clear field

What type of field? I tried to fix such behavior where I could find.

[dimyy]

May be it's my mistake and value = '' appears after this code:
$queue->set('assignedUserId', $entity->get('assignedUserId'));
when $entity.assignedUserId is empty