spring-data-jpa

问题 I am creating my first Spring-Boot-Starter-data-jpa project. I was following a tutorial on that and creating a separate application in same way. When I am starting my Spring Boot application , I am getting org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is org

问题 I am creating my first Spring-Boot-Starter-data-jpa project. I was following a tutorial on that and creating a separate application in same way. When I am starting my Spring Boot application , I am getting org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is org

问题 I am creating my first Spring-Boot-Starter-data-jpa project. I was following a tutorial on that and creating a separate application in same way. When I am starting my Spring Boot application , I am getting org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is org

问题 I am struggling with understanding how to use Spring Data/JPA to interact with a database. I'm using the simple H2 database currently for testing purposes. I have a main item, Task , that in addition to fields, also has two collections of "child" data: TaskNote and StateChangeHistory . In my task service class, I have a @PostConstruct method to set up some dummy data and save it to the database so that I can retrieve and display it later. It appears that the Task is being saved, but none of

问题 Is it possible to compare LocalDate with LocalDateTime in HQL/JPQL? This is my query of repository method in spring data which should return amount of orders per required dates. The field deliveryDateTime in Order entity has type LocalDateTime . I want to ignore time part and compare only date part. @Query("SELECT new OrderCountPerDate(DATE(o.deliveryDateTime), COUNT(o.id)) FROM Order o WHERE DATE(o.deliveryDateTime) IN :dates GROUP BY DATE(o.deliveryDateTime) ") List<LocalDate>

问题 I want to sort a nested collection property dynamically based on the query parameter sort. Suppose i have an entity A as class A{ @OneToMany(mappedBy="a") private Set<B> bset; } class B{ private LocalDate datefield; @ManyToOne private C c; } class C { private Double quantity; } I am calling repository of A with findAll(Specification specification,Pageable page) From UI, rest controller is called with sort param as below pattern url?page=0&size=10&sort=bset_datefield As it is a nested

问题 in our Spring application we have a table that contains a lot of "Payment" record. Now we need a query that pages the results sorted from the one with the largest total to the smallest, we are facing an error because sometimes the same record is contained in two successive pages. We are creating a PageRequest passed to the repository. Here our implementation: Repository: public interface StagingPaymentEntityRepository extends JpaRepository<StagingPaymentEntity, Long> { Page

问题 I'm using spring batch 4.0 and i'm trying to test my batch. I would use embedded database h2 with @JpaDataTest but it doesn't work. When i add this annotation i got error java.lang.IllegalStateException: Existing transaction detected in JobRepository. Please fix this and try again (e.g. remove @Transactional annotations from client). @Transaction(propagation=Propagation.NEW_REQUIRED) on the @Test dosen't work. I tried to copy every annotations from @JpaDataTest and remove @Transaction

问题 We are using Spring JPA in our project without any L2 cache. As per the docs, within a session, the related entities are returned from the L1 cache. To test this out, in application.yml I enabled the query generation spring.jpa.show-sql=true spring.jpa.properties.hibernate.format_sql=true In the implementation class, I added the following two lines of code. Employee emp1 = employeeRepository.getByEmployeeCode(empCode); Employee emp2 = employeeRepository.getByEmployeeCode(empCode); I was

问题 I have a small issue. Let’s assume I have this Entity: import lombok.Data; import javax.persistence.*; import java.util.Set; @Data @Entity public class Person { enum SEX {F, M} @Id @GeneratedValue private Long id; @OrderBy @Enumerated(EnumType.STRING) @ElementCollection(fetch = FetchType.EAGER) private Set<SEX> sexes; private String firstName; private String lastName; } Because at some points I do not want to load the first and last name, I use Projections (https://docs.spring.io/spring-data