--- /dev/null
+<?php
+
+namespace Drupal\migrate_drupal\Plugin\migrate\source\d8;
+
+use Drupal\migrate\Row;
+use Drupal\migrate_drupal\Plugin\migrate\source\DrupalSqlBase;
+
+/**
+ * Drupal config source from database.
+ *
+ * @MigrateSource(
+ * id = "d8_config"
+ * )
+ */
+class Config extends DrupalSqlBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function query() {
+ $query = $this->select('config', 'c')
+ ->fields('c', ['collection', 'name', 'data']);
+ if (!empty($this->configuration['collections'])) {
+ $query->condition('collection', (array) $this->configuration['collections'], 'IN');
+ }
+ if (!empty($this->configuration['names'])) {
+ $query->condition('name', (array) $this->configuration['names'], 'IN');
+ }
+ return $query;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function prepareRow(Row $row) {
+ $row->setSourceProperty('data', unserialize($row->getSourceProperty('data')));
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function fields() {
+ return [
+ 'collection' => $this->t('The config object collection.'),
+ 'name' => $this->t('The config object name.'),
+ 'data' => $this->t('Serialized configuration object data.'),
+ ];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getIds() {
+ $ids['collection']['type'] = 'string';
+ $ids['name']['type'] = 'string';
+ return $ids;
+ }
+
+}