SqlContentEntityStorageSchema::initializeBaseTable

protected SqlContentEntityStorageSchema::initializeBaseTable(ContentEntityTypeInterface $entity_type)

protected function initializeBaseTable(ContentEntityTypeInterface $entity_type) {
  $entity_type_id = $entity_type->id();

  $schema = array(
    'description' => "The base table for $entity_type_id entities.",
    'primary key' => array($entity_type->getKey('id')),
    'indexes' => array(),
    'foreign keys' => array(),
  );

  if ($entity_type->hasKey('revision')) {
    $revision_key = $entity_type->getKey('revision');
    $key_name = $this->getEntityIndexName($entity_type, $revision_key);
    $schema['unique keys'][$key_name] = array($revision_key);
    $schema['foreign keys'][$entity_type_id . '__revision'] = array(
      'table' => $this->storage->getRevisionTable(),
      'columns' => array($revision_key => $revision_key),
    );
  }

  $this->addTableDefaults($schema);

  return $schema;
}