I have 1 class ContainerLoadList with Composite Key ContainerLoadListPK like this
#Embeddable
public class ContainerLoadListPK implements Serializable {
/**
*
*/
private static final long serialVersionUID = 3526479259987259367L;
#Basic(optional = false)
#NotNull
#Size(min = 1, max = 13)
#Column(name = "ContainerNo")
private String containerNo;
#Basic(optional = false)
#NotNull
#Size(min = 1, max = 6)
#Column(name = "VesselCode")
private String vesselCode;
#Basic(optional = false)
#NotNull
#Size(min = 1, max = 8)
#Column(name = "Voyage")
private String voyage;
public ContainerLoadListPK() {
}
public ContainerLoadListPK(String containerNo, String vesselCode, String voyage) {
this.containerNo = containerNo;
this.vesselCode = vesselCode;
this.voyage = voyage;
}
public String getContainerNo() {
return containerNo;
}
public void setContainerNo(String containerNo) {
this.containerNo = containerNo;
}
public String getVesselCode() {
return vesselCode;
}
public void setVesselCode(String vesselCode) {
this.vesselCode = vesselCode;
}
public String getVoyage() {
return voyage;
}
public void setVoyage(String voyage) {
this.voyage = voyage;
}
}
and I have another interface extended from CrudRepository like this
public interface ContainerLoadListRepository extends CrudRepository<ContainerLoadList, ContainerLoadListPK> {
List<ContainerLoadList> findByBNo(#Param("bNo") String bNo);
#Query(name = "ContainerLoadList.findByVesselCodeAndVoyage")
List<ContainerLoadList> findByVesselCodeAndVoyage(#Param("vesselCode") String vesselCode,#Param("voyage") String voyage);
}
Are You Have Another Solution for findByVesselCodeAndVoyage without using #Query?
Assuming the embedded key field inside ContainerLoadList is called pk, you can try this:
List<ContainerLoadList> findByPkVesselCodeAndPkVoyage(String vesselCode, String voyage);
For more information, check the Spring Data JPA Property Expressions documentation.
Related
Using Spring Data JPA & Hibernate, I am saving an object Company, that has 0 to Many AccountMapping. The AccountMappings Primary Key is a composite of a String accountNumber and the Company Primary Key. When I save a new company the COMP_NUM from the Company Object is not set into the AccountMapping object. When I use long companyNumber it is zero, and Long it is NUM. Hibernate is executing the insert statement first, but how to get it to set the primary key from company into child object ?
#Entity
#Table(name = "COMPANY")
public class Company implements Serializable {
#Id
#Column(name = "COMP_NUM")
#SequenceGenerator(name = "comp_num_seq", sequenceName = "comp_num_seq", allocationSize = 1)
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "comp_num_seq")
private long number;
#OneToMany(mappedBy = "companyNumber", fetch = FetchType.LAZY, cascade = CascadeType.ALL)
private List<AccountMapping> accountMappings;
public Company() {
super();
}
public long getNumber() {
return this.number;
}
public void setNumber(long id) {
this.number = id;
}
public List<AccountMapping> getAccountMappings() {
return accountMappings;
}
public void setAccountMappings(List<AccountMapping> accountMappings) {
this.accountMappings = accountMappings;
}
}
#Entity
#IdClass(value = AccountMappingPK.class)
#Table(name = "ACCOUNT_MAPPING")
public class AccountMapping implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#Column(name = "ACCNT_NUM")
private String accountNumber;
#Id
#Column(name = "COMP_NUM")
private Long companyNumber;
#Column(name = "IS_PRIMARY")
private Boolean isPrimary;
public String getAccountNumber() {
return accountNumber;
}
public void setAccountNumber(String accountNumber) {
this.accountNumber = accountNumber;
}
public Long getCompanyNumber() {
return companyNumber;
}
public void setCompanyNumber(Long companyNumber) {
this.companyNumber = companyNumber;
}
public Boolean getIsPrimary() {
return isPrimary;
}
public void setIsPrimary(Boolean isPrimary) {
this.isPrimary = isPrimary;
}
}
public class AccountMapping implements Serializable {
#Column(name = "EA_ACCNT_NUM", nullable = false)
private String accountNumber;
#Column(name = "COMP_NUM", nullable = false)
private Long companyNumber;
public AccountMapping() {
// default constructor
}
public String getAccountNumber() {
return accountNumber;
}
public void setAccountNum(String accountNumber) {
this.accountNumber = accountNumber;
}
public Long getCompanyNumber() {
return companyNumber;
}
public void setCompanyNumber(Long companyNumber) {
this.companyNumber = companyNumber;
}
#Override
public boolean equals(Object obj) {
if (obj instanceof AccountMappingPK) {
AccountMappingPK accntPk = (AccountMappingPK) obj;
if (!(accountNumber.equals(accntPk.getAccountNumber()))) {
return false;
}
if (!(accntPk.getCompanyNumber() == (companyNumber))) {
return false;
}
return true;
}
return false;
}
#Override
public int hashCode() {
int hash = (accountNumber == null ? 1 : accountNumber.hashCode());
return (int) (hash * companyNumber);
}
}
#Entity
#IdClass(value = AccountMappingPK.class)
#Table(name = "ACCOUNT_MAPPING")
public class AccountMapping implements Serializable {
#Id
#Column(name = "ACCNT_NUM")
private String accountNumber;
#Id
#ManyToOne
#JoinColumn(name = "COMP_NUM")
private Company company;
...
}
// No annotations in this class
public class AccountMappingPK implements Serializable {
private String accountNumber;
private Company company;
...
// All the getter/setter, constructors, and so on ...
}
The Hibernate ORM documentation has more details about mapping with #IdClass: See Example 134. IdClass with #ManyToOne
In our spring boot Restful WebService, we have two master tables with many-to-many relationship between them. But in the transaction table, we want one extra field (current_time) as part of the embedded key other than the primary keys of the two tables. Now, we’ve created a separate class for defining embedded primary key using #Embeddable. Now, while inserting one transaction row to transaction table using Spring JPA, I am manually setting the primary keys in the corresponding entity and calling the save method on corresponding repository. But It is giving me ConstraintViolationException as the current_time is going with null value even if I have manually set it. Any help would be highly appreciated.
First Entity is as follows :
#Entity
#Table(name = "project")
public class Project {
#Id
#GenericGenerator(name = "projectid", strategy = "com.sample.upload.entity.ProjectIDGenerator")
#GeneratedValue(generator = "projectid")
#Column(name = "projectid")
private String projectID;
#Column(name = "project_name")
private String projectName;
#Column(name = "project_descr")
private String projectDesc;
#Column(name = "project_input_path")
private String projectPath;
#Column(name = "project_creation_time")
private Calendar projectCreationTime;
#ManyToMany(cascade = CascadeType.ALL)
#JoinTable(name = "project_migration", joinColumns = #JoinColumn(name = "projectid", referencedColumnName = "projectid"), inverseJoinColumns = #JoinColumn(name = "migratorid", referencedColumnName = "migratorid"))
private List<Migrator> migrators;
#Column(name = "account_name")
private String accountName;
#Column(name = "account_group")
private String accountGroup;
public String getProjectID() {
return projectID;
}
public void setProjectID(String projectID) {
this.projectID = projectID;
}
public String getAccountName() {
return accountName;
}
public void setAccountName(String accountName) {
this.accountName = accountName;
}
public String getAccountGroup() {
return accountGroup;
}
public void setAccountGroup(String accountGroup) {
this.accountGroup = accountGroup;
}
public String getProjectName() {
return projectName;
}
public void setProjectName(String projectName) {
this.projectName = projectName;
}
public String getProjectDesc() {
return projectDesc;
}
public void setProjectDesc(String projectDesc) {
this.projectDesc = projectDesc;
}
public String getProjectPath() {
return projectPath;
}
public void setProjectPath(String projectPath) {
this.projectPath = projectPath;
}
public Calendar getProjectCreationTime() {
return projectCreationTime;
}
public void setProjectCreationTime(Calendar projectCreationTime) {
this.projectCreationTime = projectCreationTime;
}
public List<Migrator> getMigrators() {
return migrators;
}
public void setMigrators(List<Migrator> migrators) {
this.migrators = migrators;
}
}
Second Entity :
#Entity
#GenericGenerator(name = "generatorName", strategy = "increment")
#Table(name = "migrator")
public class Migrator {
#Id
#GeneratedValue(generator = "generatorName")
#Column(name = "migratorid")
private String migratorId;
#Column(name = "src_tech_name")
private String srcTechName;
#Column(name = "dest_tech_name")
private String destTechName;
#Column(name = "migrator_name")
private String migratorName;
#Column(name = "migrator_type")
private String migratorType;
public String getMigratorId() {
return migratorId;
}
public void setMigratorId(String migratorId) {
this.migratorId = migratorId;
}
public String getSrcTechName() {
return srcTechName;
}
public void setSrcTechName(String srcTechName) {
this.srcTechName = srcTechName;
}
public String getDestTechName() {
return destTechName;
}
public void setDestTechName(String destTechName) {
this.destTechName = destTechName;
}
public String getMigratorName() {
return migratorName;
}
public void setMigratorName(String migratorName) {
this.migratorName = migratorName;
}
public String getMigratorType() {
return migratorType;
}
public void setMigratorType(String migratorType) {
this.migratorType = migratorType;
}
#Override
public String toString() {
return "Technology [migratorId=" + migratorId + ", srcTechName=" + srcTechName + ", destTechName="
+ destTechName + ", migratorName=" + migratorName + ", migratorType=" + migratorType + "]";
}
}
The join (transaction) table's entity :
#Entity
#Table(name = "project_migration")
public class ProjectMigration {
#EmbeddedId
private ProjectMigrationID migrationId;
#Column(name ="migration_finish_time")
private Calendar migrationFinishTime;
#Column(name ="time_in_millis_for_migration")
private long timeInMillisForMigration;
#Column(name ="migration_status")
private String migrationStatus;
#Column(name ="migrated_codebase_path")
private String migratedCodeBasePath;
The embedded Primary Key class is as follows:
#Embeddable
public class ProjectMigrationID implements Serializable {
private static final long serialVersionUID = -3623993529011381924L;
#Column(name = "projectid")
private String projectId;
#Column(name = "migratorid")
private String migratorId;
#Column(name = "migration_start_time")
private Calendar migrationStartTime;
public ProjectMigrationID() {
}
public ProjectMigrationID(String projectId, String migratorId, Calendar migrationStartTime) {
this.projectId = projectId;
this.migratorId = migratorId;
this.migrationStartTime = migrationStartTime;
}
The snippet from service Class :
for (String migratorId : data.getMigratorIds()) {
Migrator migrator = migratorRepository.findByMigratorId(migratorId);
migrators.add(migrator);
}
if (projectId != null) {
project = projectRepository.findByProjectID(projectId);
System.out.println(project==null);
project.setMigrators(migrators);
System.out.println("I am here");
if (project != null) {
//project.setMigrationStatus("In Progress");
ProjectMigrationID pmId = new ProjectMigrationID();
pmId.setProjectId(project.getProjectID());
pmId.setMigratorId(project.getMigrators().get(0).getMigratorId());
pmId.setMigrationStartTime(new GregorianCalendar());
ProjectMigration pm = new ProjectMigration();
pm.setMigrationId(pmId);
pm.setMigrationStatus("Pending");
projectMigrationRepository.save(pm);
That's because of the #JoinTable where the date is not included and it skips the insertion. If you include a column with all the primary keys needed, it will work as expected.
Only the columns mapped via #JoinTable will be included during insertion or update (defaults to true when mapped)
Either include the date time column in the Project class or use association without #JoinTable.
I'm editing via mobile. So please ignore typos if any.
Post class
one to many mapping
Composite primary key using id
I am getting null pointer exception when I make get request for getting comments
#Entity
#Table(name = "posts")
public class Post {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#NotNull
#Size(max = 100)
#Column(unique = true)
private String title;
#NotNull
#Size(max = 250)
private String description;
#NotNull
#Lob
private String content;
#NotNull
#Temporal(TemporalType.TIMESTAMP)
#Column(name = "posted_at")
private Date postedAt = new Date();
#NotNull
#Temporal(TemporalType.TIMESTAMP)
#Column(name = "last_updated_at")
private Date lastUpdatedAt = new Date();
#OneToMany(cascade = CascadeType.ALL,
fetch = FetchType.LAZY,
mappedBy = "post")
private Set<Comment> comments = new HashSet<>();
public Post() {
}
public Post(String title, String description, String content) {
this.title = title;
this.description = description;
this.content = content;
}
//getters and setters
}
Comment class
many to one mapping with composite primary keys using #Idclass
#Entity
#IdClass(CommentId.class)
#Table(name = "comments")
public class Comment {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#NotNull
#Lob
private String text;
#Id
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "post_id", nullable = false)
private Post post;
public Comment() {
}
public Comment(String text) {
this.text = text;
}
//getters and setters
}
Id class
CommentId
public class CommentId implements Serializable {
private static final long serialVersionUID = 1L;
private Post post;
private Long id;
public CommentId(Post post, Long id) {
super();
this.post = post;
this.id = id;
}
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result+ ((post == null) ? 0 : post.hashCode());
result = prime * result ;
return result;
}
public boolean equals(Object object) {
if (object instanceof CommentId) {
CommentId pk = (CommentId)object;
return id.equals(pk.id) && post == pk.post;
} else {
return false;
}
}
//getters and setters
}
repositories
PostRepository
CommentRepository
#Repository
public interface PostRepository extends JpaRepository<Post, Long> {
}
#Repository
public interface CommentRepository extends JpaRepository<Comment, Long>
{
}
Controller class get request and I am using mysql database
#RestController
#RequestMapping("/demo")
public class Controller {
#Autowired
PostRepository ps;
CommentRepository cs;
#GetMapping("/post")
public List<Post> getAll(){
return ps.findAll();
}
#GetMapping("/comment")
public List<Comment> getAllcom(){
return cs.findAll();
}
}
I've worked with Spring and Hibernate. Now having a look at Spring Data JPA (2.0.3) with JPA 2.2
AgencyTicketType
#Entity
#Table(name = "agency_ticket_type", catalog = "test")
public class AgencyTicketType implements java.io.Serializable {
private Long id;
private String name;
private Agency agency;
private Set<AgencyTicketCategory> agencyTicketCategories = new HashSet<AgencyTicketCategory>(0);
#Id
#GeneratedValue(strategy = IDENTITY)
#Column(name = "id", unique = true, nullable = false)
public Long getId() {
return this.id;
}
public void setId(Long id) {
this.id = id;
}
#Column(name = "name", nullable = false, length = 100)
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "agency_id", nullable = false)
public Agency getAgency() {
return this.agency;
}
public void setAgency(Agency agency) {
this.agency = agency;
}
#OneToMany(fetch = FetchType.LAZY, mappedBy = "agencyTicketType")
public Set<AgencyTicketCategory> getAgencyTicketCategories() {
return this.agencyTicketCategories;
}
public void setAgencyTicketCategories(Set<AgencyTicketCategory> agencyTicketCategories) {
this.agencyTicketCategories = agencyTicketCategories;
}
}
AgencyTicketCategory
#Entity
#Table(name = "agency_ticket_category", catalog = "waytest")
public class AgencyTicketCategory implements java.io.Serializable {
private Long id;
private AgencyTicketType agencyTicketType;
private String name;
private BigDecimal price;
private Set<TripTicket> tripTickets = new HashSet<TripTicket>(0);
#Id
#GeneratedValue(strategy = IDENTITY)
#Column(name = "id", unique = true, nullable = false)
public Long getId() {
return this.id;
}
public void setId(Long id) {
this.id = id;
}
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "agency_ticket_type_id", nullable = false)
public AgencyTicketType getAgencyTicketType() {
return this.agencyTicketType;
}
public void setAgencyTicketType(AgencyTicketType agencyTicketType) {
this.agencyTicketType = agencyTicketType;
}
#Column(name = "name", nullable = false, length = 100)
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
#Column(name = "price", nullable = false, precision = 8)
public BigDecimal getPrice() {
return this.price;
}
public void setPrice(BigDecimal price) {
this.price = price;
}
#OneToMany(fetch = FetchType.LAZY, mappedBy = "agencyTicketCategory")
public Set<TripTicket> getTripTickets() {
return this.tripTickets;
}
public void setTripTickets(Set<TripTicket> tripTickets) {
this.tripTickets = tripTickets;
}
}
Repository
public interface TicketTypeRepository extends JpaRepository<AgencyTicketType, Long> {
#EntityGraph(attributePaths={ "agencyTicketCategories" }, type=EntityGraphType.LOAD)
#Query("select type from AgencyTicketType type where type.agency.code=?1")
List<AgencyTicketType> findByAgency(String agencyCode);
}
Service
#Service
public class TicketServiceImpl implements TicketService {
#Autowired private TicketTypeRepository ticketType;
#Transactional(readOnly=true)
#Override
public List<AgencyTicketType> findByName(String code) {
return ticketType.findByAgency(code);
}
}
When debugged on Service, it seems, the query eagerly fetches all the lazy loaded properties - agency, agencyTicketCategories - and all their inner lazy loaded properties, which leads to JSON serilization error.
Need to fetch only these
AgencyTicketTypes [
{
id, name,
agencyTicketCategories [
{id,name,price},....
]
},.....
]
Can I do this with #EntityGraph? What I am missing?
Specifying lazy loading is only a hint for the JPA provider. Depending on the provider you use (Hibernate, EclipseLink etc.) it may be completely ignored and the dependencies may be eagerly fetched.
What you need to do is configure how your classes are mapped to json. Assuming you are using Jackson you may need to use annotations like #JsonIgnore or #JsonView. You may also map your class that only has the fields you need.
You can use Jackson annotations #JsonBackReference/#JsonManagedReference. They address problem of infinite recursion with bidirectional links in object model. As far as I understand it is your case.
See http://www.baeldung.com/jackson-bidirectional-relationships-and-infinite-recursion for more information.
One thing to point is that debugging while the transaction is open (touching the collection) will cause it to be loaded even if at real time it doesn't .. the other thing is that as #Apokralipsa mentioned , LAZY loading is just a hint that can be totally ignored and should never be relied upon whatever technique you are using
Im trying to make a basic create operation with hibernate and spring, but i keep getting the message that a id is empty when it is not.So im thinking that it might be because, the entity uses a composite id, fun fact at least for me is that i don't have any problem deleting the entities.
The method im using
#RequestMapping(value="addPatientFamilyRelative",method = RequestMethod.POST)
public #ResponseBody String addPatientFamilyRelative(#RequestParam(value="idPatient")int idPatient,
#RequestParam(value="idRelative")int idRelative,
#RequestParam(value="idRelationship")int idRelationship)
{
Patient_Relative patientRelative = new Patient_Relative();
patientRelative.setIdRelationship(relationshipService.getById(idRelationship));
patientRelative.setPatient(patientService.getById(idPatient));
patientRelative.setRelative(relativeService.getRelative(idRelative));
prService.create(patientRelative);
return "$('#tblPatientFamilyPatientRelatives').ajax.reload();$('#tblPatientRelativesList').ajax.reload()";
}
Patient_Relative class
#Entity
#Table(name="Patient_Relative")
public class Patient_Relative implements Serializable{
/**
*
*/
private static final long serialVersionUID = -2670460334767266076L;
#EmbeddedId
#JoinColumn(name = "idRelative", referencedColumnName = "idRelative", insertable = false, updatable = false)
#ManyToOne(optional = false)
#JsonIgnore
private Relative relative;
#JoinColumn(name = "idRelationship", referencedColumnName = "idRelationship")
#ManyToOne
private Relationship idRelationship;
#JoinColumn(name = "idPatient", referencedColumnName = "idPatient", insertable = false, updatable = false)
#ManyToOne(optional = false)
#JsonIgnore
private Patient patient;
public Relative getRelative() {
return relative;
}
public void setRelative(Relative relative) {
this.relative = relative;
}
public Relationship getIdRelationship() {
return idRelationship;
}
public void setIdRelationship(Relationship idRelationship) {
this.idRelationship = idRelationship;
}
public Patient getPatient() {
return patient;
}
public void setPatient(Patient patient) {
this.patient = patient;
}
}
PatientRelativeId
#Embeddable
public class PatientRelativeId implements java.io.Serializable {
/**
*
*/
private static final long serialVersionUID = 2719758608242901070L;
#Column(name = "idPatient")
private int patientId;
#Column(name = "idRelative")
private int relativeId;
public PatientRelativeId() {
}
public PatientRelativeId(int patientId, int relativeId) {
this.patientId = patientId;
this.relativeId = relativeId;
}
public int getPatientId() {
return patientId;
}
public void setPatientId(int patientId) {
this.patientId = patientId;
}
public int getRelativeId() {
return relativeId;
}
public void setRelativeId(int relativeId) {
this.relativeId = relativeId;
}
}
i hope this is enough to get some ideas, i would have liked to add a column just for the id but i think im not able to do that anymore.
Thanks in advance
I hope this helps someone.
First , my Patient_Relative class was short 1 variable , the one that would store the composite id, so i added the variable PatientRelativeId compositeId.
Second, at the controller method all i had to do was set the values of the composite id , the patient and the relative , and then call the service to create the object.
#RequestMapping(value="addPatientFamilyRelative",method = RequestMethod.POST)
public #ResponseBody String addPatientFamilyRelative(#RequestParam(value="idPatient")int idPatient,
#RequestParam(value="idRelative")int idRelative,
#RequestParam(value="idRelationship")int idRelationship)
{
Patient_Relative patientRelative = new Patient_Relative();
PatientRelativeId id = new PatientRelativeId(idPatient, idRelative);
patientRelative.setPatienRelativeId(id);
patientRelative.setIdRelationship(relationshipService.getById(idRelationship));
patientRelative.setPatient(patientService.getById(idPatient));
patientRelative.setRelative(relativeService.getRelative(idRelative));
prService.create(patientRelative);
return "addRelative";
}