java - spring jpa - 获取具有 discriminatorType 的所有实体

Question

我有两个继承自 ExerciceFramework 实体的实体，我如何获取所有 ExerciseFramework 及其 discriminatorType professionType、findAll () 函数不返回此属性

@Entity
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name = "professionType", discriminatorType = DiscriminatorType.STRING)
public class ExerciseFrameworkEntity implements Serializable { }

@Entity
@DiscriminatorValue("ETP")
public class Company extends ExerciseFrameworkEntity { }

@Entity
@DiscriminatorValue("ETA")
public class Establishment extends ExerciseFrameworkEntity { }

@Repository
public interface ExerciceFrameworkRepository extends JpaRepository<ExerciseFramework, String> {

}

Answer 1

您只需为您想要的子类型声明一个新的存储库接口(interface)即可。像:

CompanyRepo extends JpaRepository<Company, String>

当我遇到与您相同的情况时，我刚刚创建了 3 个存储库接口(interface)，一个用于返回所有类型的基类，然后是该接口(interface)的 2 个扩展，专门返回子类型。它很容易由泛型控制。在你的情况下，类似:

 ExerciceFrameworkRepo<T extends ExceriseFrameworkEntity> extends JpaRepository<T, String>
 CompanyRepo extends ExerciseRepo<Company>
 EstablishmentRepo extends ExerciseRepo<Establishment>