spring-in-action-5-samples: Chapter 3 JDBC problems

1. In chapter 3 there isn’t a mention about adding “IngredientByIdConverter” - without it the app crashes after saving taco design.

2. The code in JdbcTacoRepository.saveTacoInfo() often results in NullPointerException. The solution is to set flag “setReturnGeneratedKeys(true)” on PreparedStatementCreatorFactory object:

PreparedStatementCreatorFactory pscf = new PreparedStatementCreatorFactory(QUERY_SAVE_TACO, Types.VARCHAR, Types.TIMESTAMP);
pscf.setReturnGeneratedKeys(true);
PreparedStatementCreator psc = pscf.newPreparedStatementCreator(Arrays.asList(taco.getName(), new Timestamp(taco.getCreatedAt().getTime())));