How does \Magento\Framework\Model\ResourceModel\Db\VersionControl\Metadata::getFields() work?

dmitry_fedyuk · April 26, 2016, 4:10pm

Context: How does \Magento\Framework\Model\ResourceModel\Db\VersionControl\Snapshot::registerSnapshot() work?

magento/magento2/blob/958164/lib/internal/Magento/Framework/Model/ResourceModel/Db/VersionControl/Metadata.php#L18-L25


/**
 * Returns list of entity fields that are applicable for persistence operations
 *
 * @param \Magento\Framework\DataObject $entity
 * @return array
 * @throws \Magento\Framework\Exception\LocalizedException
 */
public function getFields(\Magento\Framework\DataObject $entity)

github.com

magento/magento2/blob/958164/lib/internal/Magento/Framework/Model/ResourceModel/Db/VersionControl/Metadata.php#L27-L39


$entityClass = get_class($entity);
if (!isset($this->metadataInfo[$entityClass])) {
    $this->metadataInfo[$entityClass] =
        array_fill_keys(
            array_keys(
                $entity->getResource()->getConnection()->describeTable(
                    $entity->getResource()->getMainTable()
                )
            ),
            null
        );
}
return $this->metadataInfo[$entityClass];