How to convert databaseClient result into object? - converters

Question

I have a task to insert entity through r2dbc database client, and convert the result (map) into the entity.
I want to do it this way:
databaseClient.insert().into(ApplicationData.class)
.using(applicationData)
.map(converter.populateIdIfNecessary(applicationData))
.first();
But the problem is converter entity MappingR2dbcConverter isn't created by spring.
So, I decided to create it myself:
#Bean
public MappingR2dbcConverter converter(RelationalMappingContext mappingContext,
R2dbcCustomConversions r2dbcCustomConversions)....
My question, is it correct way to convert result map into entity?

Answer 1

R2dbc DatabaseClient will be part of Spring framework 5.3, see My example for Spring 5.3 M2.
public static final BiFunction<Row, RowMetadata, Post> MAPPING_FUNCTION = (row, rowMetaData) -> Post.builder()
.id(row.get("id", UUID.class))
.title(row.get("title", String.class))
.content(row.get("content", String.class))
.status(row.get("status", Post.Status.class))
.metadata(row.get("metadata", Json.class))
.createdAt(row.get("created_at", LocalDateTime.class))
.build();
public Flux<Post> findAll() {
return this.databaseClient
.sql("SELECT * FROM posts")
.filter((statement, executeFunction) -> statement.fetchSize(10).execute())
.map(MAPPING_FUNCTION)
.all();
}
public Mono<Post> findById(UUID id) {
return this.databaseClient
.sql("SELECT * FROM posts WHERE id=:id")
.bind("id", id)
.map(MAPPING_FUNCTION)
.one();
}