--- /dev/null
+<?php
+
+namespace Drupal\migrate_entity_test\Entity;
+
+use Drupal\Core\Entity\ContentEntityBase;
+use Drupal\Core\Entity\EntityTypeInterface;
+use Drupal\Core\Field\BaseFieldDefinition;
+
+/**
+ * Defines a content entity type that has a string ID.
+ *
+ * @ContentEntityType(
+ * id = "migrate_string_id_entity_test",
+ * label = @Translation("String id entity test"),
+ * base_table = "migrate_entity_test_string_id",
+ * entity_keys = {
+ * "id" = "id",
+ * }
+ * )
+ */
+class StringIdEntityTest extends ContentEntityBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
+ return [
+ 'id' => BaseFieldDefinition::create('integer')
+ ->setSetting('size', 'big')
+ ->setLabel('ID'),
+ 'version' => BaseFieldDefinition::create('string')
+ ->setLabel('Version'),
+ ];
+ }
+
+}