Get an error on app run This class [class com.socnetw.socnetw.model.Relationship] does not define an IdClass
. When I used EntityManager all worked well. But now I switch to Spring CrudRepository<T, T>
and get this error. I know problem's about mapping primary key constraint. But what exactly I should to do I dont know. Could some one help hendle it?
Relationship.class
@Table(name = "RELATIONSHIP")
@Getter
@Setter
@Entity
@ToString
@EqualsAndHashCode
public class Relationship implements Serializable {
@Id
private Long userIdFrom;
@Id
private Long userIdTo;
@Enumerated(EnumType.STRING)
private RelationshipStatus status;
@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "YYYY-MM-DD HH:mm:ss")
private LocalDate friendsRequestDate;
}
RelationshipRepository.class just for case
public interface RelationshipRepository extends CrudRepository<Relationship, Long> {
@Query(value = "some query", nativeQuery = true)
Long findAmountOfFriends(@Param("userId") Long userId);
...other methods
}
DataInit.class
@Component
public class DataInit implements ApplicationListener<ContextRefreshedEvent> {
private UserRepository userRepository;
private PostRepository postRepository;
private RelationshipRepository relationshipRepository;
private MessageRepositorys messageRepository;
public DataInit(UserRepository userRepository, PostRepository postRepository, RelationshipRepository relationshipRepository, MessageRepositorys messageRepository) {
this.userRepository = userRepository;
this.postRepository = postRepository;
this.relationshipRepository = relationshipRepository;
this.messageRepository = messageRepository;
}
@Override
@Transactional
public void onApplicationEvent(ContextRefreshedEvent event) {
//here I create users and save them
...
...
...
userRepository.save(someUser);
relationshipRepository.save(relationship);
messageRepository.save(message);
}
}
Error
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'dataInit' defined in file [C:\Users\tpmylov\Desktop\learning\Projects\socnetw\target\classes\com\socnetw\socnetw\bootstrap\DataInit.class]: Unsatisfied dependency expressed through constructor parameter 2; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'relationshipRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: This class [class com.socnetw.socnetw.model.Relationship] does not define an IdClass
...
...
...
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'relationshipRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: This class [class com.socnetw.socnetw.model.Relationship] does not define an IdClass
You have a composite key:
@Id
private Long userIdFrom;
@Id
private Long userIdTo;
For this you have to create an IdClass:
public class RelationshipId implements Serializable {
private Long userIdFrom;
private Long userIdTo;
// Getter and Setter
}
Then you can use it on the class
@IdClass(RelationshipId.class)
public class Relationship ....
And on the Repository:
public interface RelationshipRepository
extends CrudRepository<Relationship, RelationshipId> {
@Query(value = "some query", nativeQuery = true)
Long findAmountOfFriends(@Param("userId") Long userId);
...other methods
}
Read more about composite keys in the official Hibernate documentation:
Your entity Relationship
declaration assumes usage of composite primary key . So, you should correct your entity in the following way:
@Table(name = "RELATIONSHIP")
@Getter
@Setter
@Entity
@ToString
@EqualsAndHashCode
@IdClass(RelationshipPK.class)
public class Relationship implements Serializable {
@Id
private Long userIdFrom;
@Id
private Long userIdTo;
@Enumerated(EnumType.STRING)
private RelationshipStatus status;
@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "YYYY-MM-DD HH:mm:ss")
private LocalDate friendsRequestDate;
}
and then RelationshipPK
:
public class RelationshipPK implements Serializable {
private Long userIdFrom;
private Long userIdTo;
public RelationshipPK(Long userIdFrom, Long userIdTo) {
this.userIdFrom = userIdFrom;
this.userIdTo = userIdTo;
}
public RelationshipPK() {
}
//Getters and setters are omitted for brevity
@Override
public boolean equals(Object o) {
if ( this == o ) {
return true;
}
if ( o == null || getClass() != o.getClass() ) {
return false;
}
RelationshipPK pk = (RelationshipPK) o;
return Objects.equals( userIdFrom, pk.userIdFrom ) &&
Objects.equals( userIdTo, pk.userIdTo );
}
@Override
public int hashCode() {
return Objects.hash( userIdFrom, userIdTo );
}
}
and your CrudRepository
should have the following view:
public interface RelationshipRepository extends CrudRepository<Relationship, RelationshipPK>
{
@Query(value = "some query", nativeQuery = true)
Long findAmountOfFriends(@Param("userId") Long userId);
...other methods
}
Actually, hibernate allows to declare a composite key and without this stuff. This is so called composite identifiers with associations . But it is necessary for the following CrudRepository methods:
public interface CrudRepository<T,ID> extends Repository<T,ID>
{
void deleteById(ID id);
boolean existsById(ID id);
Iterable<T> findAllById(Iterable<ID> ids);
Optional<T> findById(ID id);
// ...
}
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.