getOneById method

@override Future<T?> getOneById(String? correlationId, K id)

Gets a data item by its unique id.

• correlationId (optional) transaction id to trace execution through call chain.
• id an id of data item to be retrieved. Return Future that receives data item or error.

Implementation

@override
Future<T?> getOneById(String? correlationId, K id) async {
  var items = List<T>.from(this.items.where((x) {
    return x.id == id;
  }));
  var item = items.isNotEmpty ? items[0] : null;

  if (item != null) {
    logger.trace(correlationId, 'Retrieved item %s', [id]);
  } else {
    logger.trace(correlationId, 'Cannot find item by %s', [id]);
  }

  return item;
}