spring web flux the mapper returned a null value

JPA 1.0 was released in 2006, and the latest (at the time of writing) versions are JPA 2.2 and Hibernate ORM 5.4.14.Final. The most popular JPA vendor is Hibernate ORM. JPA (Java Persistence API) is an API specification that defines an ORM (object-relational mapping) standard for Java applications. Spring Data JPA allows to build repositories based on JPA. Spring Data makes it easy to implement a Repository for accessing persistent entities in the underlying data store. Spring Data is a family of libraries aiming to simplify the implementation of a data access layer for Spring-based applications by reducing boilerplate code. spring-data-r2dbc-examples - Spring Data R2DBC for reactive database connectivity.

spring-data-jdbc-examples - Spring Data JDBC as a simpler alternative inspired by Domain-Driven Design.

spring-data-jpa-examples - some of common JPA pitfalls.

These examples demonstrates some common JPA pitfalls and evaluates alternatives from the Spring Data family:

Reactive omCallable wrapping synchronous call.

Mapping from entity to DTO using MapStruct.

PagingAndSortingRepository.findAll(Pageable).

Explicit optimistic lock Explicit optimistic lock Explicit pessimistic write lock Explicit pessimistic read lock Mapping from entity to DTO using MapStruct.

Implicit optimistic lock of entity with on modification.

Entity with multiple bags resulting in MultipleBagFetchException.

Custom with Criteria API query with fetch and distinct.

Custom with Criteria API query with fetch.

Query method with with multiple attribute nodes (issue HHH-13740).Query method with Query method with and Pageable.Entity without explicit CrudRepository.findById.61 min read Spring Data JPA pitfalls and modern alternatives: Spring Data JDBC and Spring Data R2DBC

Spring web flux the mapper returned a null value