![]() ![]() So you have to add a callback Bean to set your Id manually. This annotation defines the Hibernate type mapping. Several sources ( here, here, here, here, here and here) indicate that there is no auto Id generation for R2DBC. I ditched the JPA approach - and note that we are using R2DBC, not JDBC, so the answer didn't work straight away. It takes up a lot of space (string type). UUID generator (only recommended for testing, as integer surrogate keys generated by the. uuid is encoded into a 32-bit 16-digit string. The id is a special property that represents the database. Thanks to Sve Kamenska, with whose help I finally got it working eventually. The 128-bit uuid algorithm is used to generate the primary key. The DDL for the table is like this: CREATE TABLE DOODAHS(id UUID not null, fieldA VARCHAR(10), fieldB VARCHAR(10)) NB the persistence is being handled by a class which looks like this: interface DoodahRepository extends CrudRepository and replace the main method with the following code. Make sure you have previously created project in IDE. Then in your entity, define the custom type and use it for. The Increament generator class of hibernate is responsible for finding the max value of existing ids in database table and then increament it by one (max (id)+1) and then returns the id value.
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