Gets the schema for a single field definition.

Entity types may override this method in order to optimize the generated schema for given field. While all optimizations that apply to a single field have to be added here, all cross-field optimizations should be via SqlContentEntityStorageSchema::getEntitySchema() instead; e.g., an index spanning multiple fields.

Parameters

\Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition: The storage definition of the field whose schema has to be returned.

string $table_name: The name of the table columns will be added to.

string[] $column_mapping: A mapping of field column names to database column names.

Return value

array The schema definition for the table with the following keys:

• fields: The schema definition for the each field columns.
• indexes: The schema definition for the indexes.
• unique keys: The schema definition for the unique keys.
• foreign keys: The schema definition for the foreign keys.

Overrides SqlContentEntityStorageSchema::getSharedTableFieldSchema

File

core/modules/file/src/FileStorageSchema.php, line 16

Class

FileStorageSchema

Defines the file schema handler.

Namespace

Drupal\file

Code

protected function getSharedTableFieldSchema(FieldStorageDefinitionInterface $storage_definition, $table_name, array $column_mapping) {
  $schema = parent::getSharedTableFieldSchema($storage_definition, $table_name, $column_mapping);
  $field_name = $storage_definition->getName();
  if ($table_name == $this->storage
    ->getBaseTable()) {
    switch ($field_name) {
      case 'status':
      case 'changed':
      case 'uri':
        $this->addSharedTableFieldIndex($storage_definition, $schema, TRUE);
        break;

    }
  }
  // Entity keys automatically have not null assigned to TRUE, but for the
  // file entity, NULL is a valid value for uid.
  if ($field_name === 'uid') {
    $schema['fields']['uid']['not null'] = FALSE;
  }
  return $schema;
}

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