R2DBC Postgres SQL Enum Issue - spring-data-r2dbc

Question

As part of learning r2DBC i have come across an issue facing with Enum conversion. I am using PostgreSQL here.
When reading data for Film where rating is PG-13 and NC-17( anything with dash ) i am facing issues.
Below is my schema for table
create table film
(
film_id integer default nextval('film_film_id_seq'::regclass) not null
constraint film_pkey
primary key,
title varchar(255) not null,
description text,
release_year year,
language_id smallint not null
constraint film_language_id_fkey
references language
on update cascade on delete restrict,
rental_duration smallint default 3 not null,
rental_rate numeric(4, 2) default 4.99 not null,
length smallint,
replacement_cost numeric(5, 2) default 19.99 not null,
rating mpaa_rating default 'G'::mpaa_rating,
last_update timestamp default now() not null,
special_features text[]
);
And the mpaa_rating is defined as
create type mpaa_rating as enum ('G', 'PG', 'PG-13', 'R', 'NC-17');
This is my code which registers the converters in my Configuration
#Configuration
#EnableTransactionManagement
#EnableR2dbcRepositories
#EnableR2dbcAuditing
public class DVDRentalDBConfiguration extends AbstractR2dbcConfiguration {
#Bean
public ConnectionFactory connectionFactory() {
System.out.println("Initializing postgreSQL connection factory");
return new PostgresqlConnectionFactory(
PostgresqlConnectionConfiguration.builder()
.host("localhost")
.database("dvdrental")
.username("postgres")
.password("postgres")
.codecRegistrar(EnumCodec.builder().withEnum("mpaa_rating", Rating.class).build())
.build()
);
}
#Override
protected List<Object> getCustomConverters() {
return Collections.singletonList(new RatingWritingConverter());
}
#Bean
ReactiveTransactionManager transactionManager(ConnectionFactory connectionFactory) {
System.out.println("Initializing postgreSQL connection factory");
return new R2dbcTransactionManager(connectionFactory);
}
}
My code for retrieving is pretty simple
private Mono<FilmModel> getFilmById(Long id) {
return filmRepository.findById(id).switchIfEmpty(Mono.error(DataFormatException::new));
}
Adding the exception which is thrown https://gist.github.com/harryalto/bd51bbcdd081868c5064c808d08205e4
I tried researching stack overflow but couldn't figure out the issue. Any help is greatly appreciated.

Answer 1

If you are using Spring Boot/Spring Data R2dbc to map table to POJO, you can skip the enum definition in Postgres, by default Spring Data R2dbc will handle the enum as varchar/char in db side, and use Enum in java POJO, check my example, and schema sql script and mapped entity class. Spring Boot registered mapping converter to convert them automatically.
If you would like to handle the Enum type yourself, check this example.