Neos\FluidAdaptor\ViewHelpers\Form\AbstractFormFieldViewHelper::getValue PHP Method

    protected function getValue($convertObjects = true)
    {
        $value = null;
        if ($this->hasArgument('value')) {
            $value = $this->arguments['value'];
        } elseif ($this->isObjectAccessorMode()) {
            if ($this->hasMappingErrorOccurred()) {
                $value = $this->getLastSubmittedFormData();
            } else {
                $value = $this->getPropertyValue();
            }
            $this->addAdditionalIdentityPropertiesIfNeeded();
        }
        if ($convertObjects && is_object($value)) {
            $identifier = $this->persistenceManager->getIdentifierByObject($value);
            if ($identifier !== null) {
                $value = $identifier;
            }
        }
        return $value;
    }