modify method

@override Future<Data?> modify(Id id, Data? data, [ Map<String, dynamic>? params ])

Modifies a resource.

Implementation

@override
Future<Data?> modify(id, data, [Map<String, dynamic>? params]) async {
  var url = baseUrl.replace(
      path: _p.join(baseUrl.path, id.toString()),
      queryParameters: _buildQuery(params));

  var response =
      await app.sendUnstreamed('PATCH', url, _writeHeaders, makeBody(data));

  try {
    if (_invalid(response)) {
      if (_onModified.hasListener) {
        _onModified.addError(failure(response));
      } else {
        throw failure(response);
      }
    }

    var r = deserialize(json.decode(response.body));
    _onModified.add(r);
    return r;
  } catch (e, st) {
    if (_onModified.hasListener) {
      _onModified.addError(e, st);
    } else {
      throw failure(response, error: e, stack: st);
    }
  }

  return null;
}