How to use projections and specifications with spring data jpa?

Question

I\'m not able to use Spring Data JPA projections and specifications together. I have the following setup:

Entity:

@Entity
public cla         


        

Answer 1

I found this https://github.com/pramoth/specification-with-projection and it seems to work which does exactly what you're looking for. I've included it in my own project and so far no problems. Big thanks to Pramoth.

Basically you extend JpaSpecificationExecutorWithProjection instead of JpaSpecificationExecutor.

public interface DocumentRepository extends JpaRepository< Country,Long>,JpaSpecificationExecutorWithProjection

and you get findall() method with projections and specifications

 Page findAll(Specification spec, Class projectionClass, Pageable pageable);