getById method
Loads the instance of T whose primary key is found at
ReadOperation.itemId.
Implementation
@override
Future<ReadResult<T>> getById(ReadOperation<T> operation) async {
if (getByIdHandler == null) {
throw UnimplementedError();
}
try {
final obj = await getByIdHandler!.call(operation);
return ReadSuccess<T>(obj, details: operation.details);
} on Exception catch (e) {
_log.severe(e);
return ReadFailure<T>(
FailureReason.serverError,
'Failed to load $T with Id ${operation.itemId}',
);
}
}