实现一个spring数据仓库接口中的常规接口

Question

I'm using a Repository that extends a spring data JpaRepository and would like to let it extend another interface.

Previously, my db repository looked like this:

interface PublicTransportPricingZoneRepository : JpaRepository<PublicTransportPricingZone, Long> {

}

I have now created another interface TransitTicketRepo as defined below

interface TransitTicketRepo {
    fun findPossibleTickets(geometry: Geometry): Collection<TransitTicket>
}

and now would like to implement the interface with a default method in PublicTransportPricingZoneRepository . I've tried to solve this by changing the code of my PublicTransportPricingZoneRepository to

interface PublicTransportPricingZoneRepository : JpaRepository<PublicTransportPricingZone, Long>, TransitTicketRepo {
    fun findPossibleTickets(geometry: Geometry): Collection<TransitTicket> {
       // do something
       return emptyList()
    } 
}

but get the following error message when starting the application.

org.springframework.data.repository.query.QueryCreationException: Could not create query for public abstract java.util.Collection PublicTransportPricingZoneRepository.findPossibleTickets(Geometry); Reason: Failed to create query for method public abstract java.util.Collection...

I'm assuming the solution is to somehow tell spring data to stop auto-generating a query for findPossibleTickets but have been unable to find out how.

Answer 1

You can do it this way

In short.:

@Repository
// Your bean that will be glued together by spring
interface PublicTransportPricingZoneRepository extends JpaRepository<...>, PublicTransportPricingZoneCustomRepository {
  // Other methods, but everything must be annotated with @Query or possible for spring to guess what it needs to do from its name (google derived methods)
}

interface PublicTransportPricingZoneCustomRepository {
  // define custom methods
  List<String> nameIsNotImportant();
}

@Service
// naming here is important - it must be names as interface + Impl, otherwise spring won't pick it up
// apart from that, it's a regular bean - you can Autowire, etc
class PublicTransportPricingZoneCustomRepositoryImpl implementats PublicTransportPricingZoneCustomRepository {
  // Implement custom methods
  @Overridden
  public List<String> nameIsNotImportant() {
    // impl
  }
}