How does Magento 2 save a backend config form vield value?

dmitry_fedyuk · December 6, 2015, 6:43am

Step 1

magento/magento2/blob/2.0.0/app/code/Magento/Config/Controller/Adminhtml/System/Config/Save.php#L149-L161


$section = $this->getRequest()->getParam('section');
$website = $this->getRequest()->getParam('website');
$store = $this->getRequest()->getParam('store');


$configData = [
    'section' => $section,
    'website' => $website,
    'store' => $store,
    'groups' => $this->_getGroupsForSave(),
];
/** @var \Magento\Config\Model\Config $configModel  */
$configModel = $this->_configFactory->create(['data' => $configData]);
$configModel->save();

Step 2

github.com

magento/magento2/blob/2.0.0/app/code/Magento/Config/Model/Config.php#L129-L130


$saveTransaction = $this->_transactionFactory->create();
/* @var $saveTransaction \Magento\Framework\DB\Transaction */

Step 3

github.com

magento/magento2/blob/2.0.0/app/code/Magento/Config/Model/Config.php#L135-L146


foreach ($groups as $groupId => $groupData) {
    $this->_processGroup(
        $groupId,
        $groupData,
        $groups,
        $sectionId,
        $extraOldGroups,
        $oldConfig,
        $saveTransaction,
        $deleteTransaction
    );
}

Step 4

github.com

magento/magento2/blob/2.0.0/app/code/Magento/Config/Model/Config.php#L238-L254


/** @var \Magento\Framework\App\Config\ValueInterface $backendModel */
$backendModel = $field->hasBackendModel() ? $field
    ->getBackendModel() : $this
    ->_configValueFactory
    ->create();


$data = [
    'field' => $fieldId,
    'groups' => $groups,
    'group_id' => $group->getId(),
    'scope' => $scope,
    'scope_id' => $scopeId,
    'scope_code' => $scopeCode,
    'field_config' => $field->getData(),
    'fieldset_data' => $fieldsetData
];
$backendModel->addData($data);

Step 5

Step 6

github.com

magento/magento2/blob/2.0.0/app/code/Magento/Config/Model/Config.php#L444-L460


protected function _checkSingleStoreMode(
    \Magento\Config\Model\Config\Structure\Element\Field $fieldConfig,
    $dataObject
) {
    $isSingleStoreMode = $this->_storeManager->isSingleStoreMode();
    if (!$isSingleStoreMode) {
        return;
    }
    if (!$fieldConfig->showInDefault()) {
        $websites = $this->_storeManager->getWebsites();
        $singleStoreWebsite = array_shift($websites);
        $dataObject->setScope('websites');
        $dataObject->setWebsiteCode($singleStoreWebsite->getCode());
        $dataObject->setScopeCode($singleStoreWebsite->getCode());
        $dataObject->setScopeId($singleStoreWebsite->getId());
    }
}

Step 7

github.com

magento/magento2/blob/2.0.0/app/code/Magento/Config/Model/Config.php#L258-L260


if (false == isset($fieldData['value'])) {
    $fieldData['value'] = null;
}

Step 8

github.com

magento/magento2/blob/2.0.0/app/code/Magento/Config/Model/Config.php#L262-L277


$path = $field->getGroupPath() . '/' . $fieldId;
/**
 * Look for custom defined field path
 */
if ($field && $field->getConfigPath()) {
    $configPath = $field->getConfigPath();
    if (!empty($configPath) && strrpos($configPath, '/') > 0) {
        // Extend old data with specified section group
        $configGroupPath = substr($configPath, 0, strrpos($configPath, '/'));
        if (!isset($extraOldGroups[$configGroupPath])) {
            $oldConfig = $this->extendConfig($configGroupPath, true, $oldConfig);
            $extraOldGroups[$configGroupPath] = true;
        }
        $path = $configPath;
    }
}

Step 9

Step 10

github.com

magento/magento2/blob/2.0.0/app/code/Magento/Config/Model/Config.php#L283-L297


if (isset($oldConfig[$path])) {
    $backendModel->setConfigId($oldConfig[$path]['config_id']);


    /**
     * Delete config data if inherit
     */
    if (!$inherit) {
        $saveTransaction->addObject($backendModel);
    } else {
        $deleteTransaction->addObject($backendModel);
    }
} elseif (!$inherit) {
    $backendModel->unsConfigId();
    $saveTransaction->addObject($backendModel);
}

Step 11

Step 12

github.com

magento/magento2/blob/2.0.0/lib/internal/Magento/Framework/DB/Transaction.php#L128-L130


foreach ($this->_objects as $object) {
    $object->save();
}

Step 13

github.com

magento/magento2/blob/2.0.0/lib/internal/Magento/Framework/Model/AbstractModel.php#L613-L617


public function save()
{
    $this->_getResource()->save($this);
    return $this;
}

Step 14

github.com

magento/magento2/blob/2.0.0/lib/internal/Magento/Framework/Model/ResourceModel/Db/AbstractDb.php#L395-L396


$object->validateBeforeSave();
$object->beforeSave();

Step 15

github.com

magento/magento2/blob/2.0.0/lib/internal/Magento/Framework/Model/ResourceModel/Db/AbstractDb.php#L397-L409


if ($object->isSaveAllowed()) {
    $this->_serializeFields($object);
    $this->_beforeSave($object);
    $this->_checkUnique($object);
    $this->objectRelationProcessor->validateDataIntegrity($this->getMainTable(), $object->getData());
    if ($this->isObjectNotNew($object)) {
        $this->updateObject($object);
    } else {
        $this->saveNewObject($object);
    }
    $this->unserializeFields($object);
    $this->processAfterSaves($object);
}

dmitry_fedyuk · December 6, 2015, 6:44am