Neos\Flow\Persistence\Doctrine\Query::isEmpty PHP Method

It matches if the multivalued property contains no values or is NULL.

public isEmpty ( string $propertyName ) : boolean
$propertyName	string	The name of the multivalued property to compare against
return	boolean

    public function isEmpty($propertyName)
    {
        return '(' . $this->getPropertyNameWithAlias($propertyName) . ' IS EMPTY)';
    }

Query