sonata-project/SonataDoctrineORMAdminBundle — pull request #95 by biozshock (2012-05-23 16:05:56+00:00)
Title: Fixed 'field_type' => null

This fixed exception "Expected argument of type "string or Symfony\Component\Form\FormTypeInterface", "boolean" given" in https://github.com/symfony/symfony/blob/master/src/Symfony/Component/Form/FormBuilder.php#L111