#ManyToOne or #OneToOne will replace the joined column with an entity, but how would I do when I want to use JpaRepository to query by that joined column? There's seems a conflict.
#Entity
public class Type {
private Long id;
}
#Entity
public class Item {
#ManyToOne
#JoinColumn(name = "type_id")
private Type type;
}
public interface ItemRepository extends JpaRepository<Item, Long> {
List<Item> findByTypeId(Long typeId);
}
It throws error "property typeId not found", which makes sense because it's surely not in the class "item", instead an entity "type". But how could I query Item by type_id in this situation? And if I declare property typeId, it will throw error duplicated mapping for column "type_id".
You have to do it with _ like
public interface ItemRepository extends JpaRepository<Item, Long> {
List<Item> findByType_Id(Long typeId);
}
Related
I am trying to define common query for all repositories extended my base repository:
#NoRepositoryBean
public interface DocumentRepository<T extends BaseDocument> extends JpaRepository<T, Long> {
#Query(value = "FROM BaseDocument bd WHERE (bd.createdAt IS NULL OR :to IS NULL OR bd.createdAt < :to) AND (bd.deletedAt IS NULL OR :from IS NULL OR bd.deletedAt > :from)")
Iterable<T> findAllActiveBetween(OffsetDateTime from, OffsetDateTime to);
}
#MappedSuperclass
#Where(clause="deleted_at IS NULL")
abstract public class BaseDocument {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private OffsetDateTime createdAt;
private OffsetDateTime deletedAt;
}
The problematic part is using BaseDocument in #Query.
It is posible to define such method without duplication in all sub-repositories?
When you use #MappedSuperclass the inherited classes do not share a table to select from, so each of them needs a separate query. Inheritance of the repository cannot help you here.
If you use another inheritance strategy, for example a joined multiple table inheritance it would be possible to select from the table of the superclass and then you can use the java objects to navigate. If you need to use properties from the subclass in the query, each subclass would need to implement their own queries of course.
#NoRepositoryBean
public interface DocumentRepository<T extends BaseDocument> extends JpaRepository<T, Long> {
#Query(value = "FROM BaseDocument bd WHERE (bd.createdAt IS NULL OR :to IS NULL OR bd.createdAt < :to) AND (bd.deletedAt IS NULL OR :from IS NULL OR bd.deletedAt > :from)")
Iterable<T> findAllActiveBetween(OffsetDateTime from, OffsetDateTime to);
}
#Entity
#Inheritance(strategy=InheritanceType.JOINED)
#DiscriminatorColumn(name="BaseDocument_TYPE")
#Table(name="BaseDocument")
abstract public class BaseDocument {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private OffsetDateTime createdAt;
private OffsetDateTime deletedAt;
}
#Entity
#DiscriminatorValue("TextDocument")
#Table(name="TextDocument")
public class TextDocument extends BaseDocument {
private String text;
}
#Entity
#DiscriminatorValue("AudioDocument")
#Table(name="AudioDocument")
public class AudioDocument extends BaseDocument {
private byte [] audio;
}
This is my entity with composite key:
#Entity
#Table(name = "course_ratings")
public class CourseRating {
#EmbeddedId
private CourseRatingKey id;
}
Where CourseRatingKey looks like this:
#Embeddable
public class CourseRatingKey implements Serializable {
#Column(name = "user_id")
private int userId;
#Column(name = "course_id")
private int courseId;
public CourseRatingKey() {
}
// getters, setters, equals(), hashCode()
}
And my JPA repository
#Repository
public interface CourseRatingRepository extends JpaRepository<CourseRating, CourseRatingKey> {
}
I am trying to build method that will return list of all CourseRating with given courseId property of CourseRatingKey. Below method doesn't work because JPA doesn't recognize it:
repository.findAllByIdCourseId(int id);
How can I build my method name to achieve my goal?
I have solved my problem by declaring this method in repository. I'm a bit confused as the other methods work without declaring.
#Repository
public interface CourseRatingRepository extends JpaRepository<CourseRating, CourseRatingKey> {
List<CourseRating> findAllByIdCourseId(Integer id);
}
I am making an application based on JPA/EclipseLink, I implemented a soft delete functionality using #AdditionalCriteria in the root class of the hierarchy of entities (all entities inherit from this).
My problem is that now, I need to create a special entity that contains multiple relationships with other entities; and I need recover all relationed entities, including soft deleted ones. It is possible disabled #AdditionalCriteria only in the relations of this special entity with EclipseLink? If not, what is the best option to do this? My code looks like the following:
////Example of my top entity class (all others inherit from this)
#AdditionalCriteria("this.deleted = false")
public abstract class TopHierarchyClass {
···
#Column(name = "deleted")
protected boolean deleted = false;
···
}
//Example of entity that needs recover all relationed entities including soft deleted
#Entity
#Table(name = "special_entities")
public class SpecialEntity extends EntityBase {
···
#JoinColumn(name = "iditem", referencedColumnName = "id")
#ManyToOne(fetch = FetchType.LAZY)
private Item item;
···
}
#Entity
#Table(name = "items")
public class Item extends EntityBase {
···
}
Thanks in advance
Create a new entity for the same table without the #AdditionalCriteria. This way you can retrieve all records from that table without applying the additional filter.
For example:
public interface Person {
Long getId();
void setId(Long id);
Date getDeletedAt();
void setDeletedAt(Date deletedAt);
}
#MappedSupperclass
public class PersonEntity implements Person {
#Id
private Long id;
private Date deletedAt;
public Long getId() { return id; }
public void setId(Long id) { this.id = id; }
public Date getDeletedAt() { return deletedAt; }
public void setDeletedAt(Date deletedAt) { this.deletedAt = deletedAt; }
}
#Entity
#Table(name = "people")
#AdditionalCriteria("this.deletedAt is null")
public class ActivePersonEntity extends PersonEntity {
}
#Entity
#Table(name = "people")
public class RawPersonEntity extends PersonEntity {
}
public class PeopleRepository {
#PersistenceContext
private EntityManager em;
public List<Person> all() {
return all(false);
}
public List<Person> all(boolean includeSoftDeleted) {
if (!includeSoftDeleted) {
return em.createQuery("select p from ActivePersonEntity p", ActivePersonEntity.class).getResultList();
} else {
return em.createQuery("select p from RawPersonEntity p", RawPersonEntity.class).getResultList();
}
}
}
Also, if your #AdditionalCriteria is in a super class, you may override it by declaring a new empty #AdditionalCriteria in a sub class:
You can define additional criteria on entities or mapped superclass.
When specified at the mapped superclass level, the additional criteria
definition applies to all inheriting entities, unless those entities
define their own additional criteria, in which case those defined for
the mapped superclass are ignored.
#AdditionalCriteria doc
I'm getting Unknown column 'imageprope1_.enid' in 'field list' with the following mapping:
#OneToMany(fetch=FetchType.EAGER, cascade = CascadeType.ALL)
#JoinColumn(name="enid", referencedColumnName="pnid")
private List<EntityImageProperty> imageProperties = new ArrayList<>();
Here's the key entity mapping:
BaseEntityProperty
#Entity
#Inheritance(strategy=InheritanceType.JOINED)
#DiscriminatorColumn(name="enpptpcd", discriminatorType=DiscriminatorType.STRING)
#Table(name=BaseEntityProperty.TABLE_NAME)
public abstract class BaseEntityProperty implements Serializable {
#Id
#Column(name="enppid")
private String entityPropertyId=null;
#Column(name="enid")
private String entityId=null;
EntityImageProperty
#Entity
#Inheritance(strategy=InheritanceType.JOINED)
#DiscriminatorValue(EntityImageProperty.DISCRIMINATOR_VALUE)
#Table(name=EntityImageProperty.TABLE_NAME)
#PrimaryKeyJoinColumn(name="enppid")
public class EntityImageProperty extends BaseEntityProperty {
It looks like #JoinColumn(name="enid", referencedColumnName="pnid") tells Hibernate to join on EntityImageProperty.enid, whereas it should join on BaseEntityProperty.enid.
I have have two classes that inherit from an abstract class and have a parent-children relation.
So I use annotation OneToMany and ManyToOne but the parent entity in child class is always null.
Can Someone help me please, I have spend several hours to googling and test many conf without success.
These are code from my classes :
public #Table(name="flowentity") #Entity abstract class FlowEntity {
final static Logger log = LoggerFactory.getLogger(FlowEntity.class);
//Globals informations concerning the flow state
private #Id #GeneratedValue(strategy = GenerationType.IDENTITY) Integer flowId = 0;
private String flowName;
private #OneToMany(fetch=FetchType.EAGER, cascade=CascadeType.ALL)
Set<PeopleEntity> actorSet = new HashSet<>();
//Global parameters for most of flows
//Organizational parameters
private #OneToOne(fetch=FetchType.EAGER, cascade=CascadeType.ALL)
#JoinColumn(name="organisationalEntity_Id")
OrganisationalEntity organisationalEntity;
...
public #Table(name="ams_newCPEntity") #Entity class NewMultiCPEntity extends FlowEntity {
private #OneToMany(targetEntity=NewCPEntity.class, fetch=FetchType.EAGER, cascade=CascadeType.ALL,mappedBy="parent")
Set<NewCPEntity> cpList = new HashSet<NewCPEntity>();
//Constructor
public NewMultiCPEntity(){
setFlowName(EnumFlow.N_CP_M.getFlowAcronym());
}
...
public #Table(name="ams_newCPEntity") #Entity class NewCPEntity extends FlowEntity {
final static Logger log = LoggerFactory.getLogger(NewCPEntity.class);
private boolean formNCPValidated;
private #ManyToOne #JoinColumn(name="parent_Id", nullable=false)
NewMultiCPEntity parent;
public NewCPEntity(){
log.debug("Instanciation of a new CP");
setFlowName(EnumFlow.N_CP.getFlowAcronym());
}
public #Override OrganisationalEntity getOrganisationalEntity(){
return parent.getOrganisationalEntity();
}
...
If I don't add the #JoinColumn annotation, JPA create an association table but is not able to retrieve the parent whereas the association can be done directly by requesting in database.
Thankyou very much to help.
Regards,
Thank you Chris for your comment, you are right, I forget to change the name of the table. I don't think it was the problem because the inheritance mapping is in one table flowentity with a DTYPE discriminator column.
Finally I resolve my problem by setting parent attributs when adding a new child like this :
public #Table #Entity class NewMultiCPEntity extends FlowEntity {
private #OneToMany(targetEntity=NewCPEntity.class, fetch=FetchType.EAGER, cascade=CascadeType.ALL)
List<NewCPEntity> cpList = new ArrayList<>();
//Constructor
public NewMultiCPEntity(){
setOrganisationalEntity(new OrganisationalEntity());
setFlowName(EnumFlow.N_CP_M.getFlowAcronym());
}
public List<NewCPEntity> getNCPList(){
if(cpList == null){
cpList = new ArrayList<>();
}
if(cpList.isEmpty()){
addCPEntity(new NewCPEntity());
}
return Collections.unmodifiableList(cpList);}
public boolean removeCPEntity(NewCPEntity entity){
return cpList.remove(entity);
}
public boolean addCPEntity(NewCPEntity entity){
entity.setParent(this);
entity.setOrganisationalEntity(this.getOrganisationalEntity());
return cpList.add(entity);
}
And I remove the override of getOrganizationalEntity in the child :
public #Table #Entity class NewCPEntity extends FlowEntity {
final static Logger log = LoggerFactory.getLogger(NewCPEntity.class);
private #ManyToOne(targetEntity=NewMultiCPEntity.class,cascade=CascadeType.ALL)
NewMultiCPEntity parent;
public NewCPEntity(){
log.debug("Instanciation of a new CP");
setFlowName(EnumFlow.N_CP.getFlowAcronym());
}
public NewMultiCPEntity getParent() {
return parent;
}
public void setParent(NewMultiCPEntity parent){
this.parent = parent;
}
Regards,