Overrides Drupal\Core\Entity\EntityFormController::validate().
Overrides EntityFormControllerNG::validate
public function validate(array $form, array &$form_state) {
parent::validate($form, $form_state);
// Ensure numeric values.
if (isset($form_state['values']['weight']) && !is_numeric($form_state['values']['weight'])) {
form_set_error('weight', t('Weight value must be numeric.'));
}
}