Drupal 8 Custom Field // Primitive error - php

Question

I see text field and ckeditor field on node edit page, but when i try to save node i receive "This value should be of the correct primitive type. " error.
<?php
namespace Drupal\custom_field\Plugin\Field\FieldType;
use Drupal\Core\Field\FieldItemBase;
use Drupal\Core\Field\FieldItemInterface;
use Drupal\Core\Field\FieldStorageDefinitionInterface;
use Drupal\Core\TypedData\DataDefinition;
/**
* Plugin implementation of the 'Program' field type.
*
* #FieldType(
* id = "program",
* label = #Translation("Programmation"),
* description = #Translation("Stores a Program n date string in various format"),
* default_widget = "program_default",
* default_formatter = "program_default",
* )
*/
class ProgramItem extends FieldItemBase implements FieldItemInterface {
public static function schema(FieldStorageDefinitionInterface $field_definition) {
return array(
'columns' => array(
'date' => array(
'description' => 'Programmation du jour.(date)',
'type' => 'varchar',
'length' => 255,
'size' => 'normal',
),
'programmation' => array(
'description' => 'Programmation. (Concerts)',
'type' => 'varchar',
'length' => 5000,
'size' => 'normal',
),
),
);
}
public static function propertyDefinitions(FieldStorageDefinitionInterface $field_definition) {
$properties['date'] = DataDefinition::create('string')
->setLabel(t('Date du jour'));
$properties['programmation'] = DataDefinition::create('string')
->setLabel(t('Programmation du jour'));
return $properties;
}
public function isEmpty() {
$value = $this->get('date')->getValue();
return empty($value);
}
public static function mainPropertyName() {
return 'date';
}
}
<?php
namespace Drupal\custom_field\Plugin\Field\FieldWidget;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Field\WidgetBase;
use Drupal\Core\Field\WidgetBaseInterface;
use Drupal\Core\Form\FormStateInterface;
/**
* Plugin implementation of the 'Program' widget.
*
* #FieldWidget(
* id = "program_default",
* label = #Translation("Programmation"),
* field_types = {
* "program"
* }
* )
*/
class ProgramWidget extends WidgetBase implements WidgetBaseInterface {
/**
* #param FieldItemListInterface $items
* #param int $delta
* #param array $element
* #param array $form
* #param FormStateInterface $form_state
* #return array
*/
public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
$element['date'] = array(
'#type' => 'textfield',
'#title' => $this->t('Date'),
'#placeholder' => $this->getSetting('placeholder_date'),
'#default_value' => isset($items[$delta]->date) ? $items[$delta]->date : NULL,
'#required' => $element['#required'],
);
$element['programmation'] = array(
'#type' => 'text_format',
'#title' => $this->t('Programmation'),
'#placeholder' => $this->getSetting('placeholder_programmation'),
'#default_value' => isset($items[$delta]->programmation) ? $items[$delta]->programmation : NULL,
'#format' => 'full_html',
);
$element['field_widget_display']['#access'] = true;
$element['field_widget_display_settings']['#access'] = true;
die('ProgramWidget');
return $element;
}
}
I saw that I could use the massageFormValues () method in WidgetBase, but I do not know how to use it.
A little help would be welcome.
Thank you

Answer 1

finaly i add to ProgramWidget :
/**
* {#inheritdoc}
*/
public function massageFormValues(array $values, array $form, FormStateInterface $form_state) {
foreach ($values as &$value) {
if (count($value['programmation'])) {
$value['programmation'] = $value['programmation']['value'];
} else {
$value['programmation'] = $value['programmation'] !== '' ? $value['programmation'] : '0';
}
}
return $values;
}
}
And now it s working

Answer 2

it seems because of
$element['programmation'] = array(
'#type' => 'text_format',
'#title' => $this->t('Programmation'),
'#placeholder' => $this->getSetting('placeholder_programmation'),
'#default_value' => isset($items[$delta]->programmation) ? $items[$delta]->programmation : NULL,
'#format' => 'full_html',
);
but i don't know how override method massageFormValues ..?