hello i'm trying to learn one to many mapping but i really having trouble with hibernate. I was able to persist to database but when trying to apply one to many relationship it doesn't persist to DB and also doesn't display the relationship when viewing the response body in postman. I really need help been on this problem since yesterday morning. I have looked on tutorials on youtube and on internet but every tutorial seem basic and when applying same idea no success. I have an entity person and another entity organization. A person can belong up to one organization but different persons can belong to the same organization. So my approach was using a one to many relationship.
Below is my entity of Organization:
#Entity
#Table(name="organization")
public class Organization {
#Id
#Column(name="org_Id")
#GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
private String name, description;
#OneToMany(/*fetch = FetchType.EAGER, cascade = CascadeType.ALL*/)
#JoinTable(joinColumns = #JoinColumn(name="org_Id"),
inverseJoinColumns = #JoinColumn(name="person_Id"))
// #JsonIgnore
//#JoinColumn(name="org_Id")
private Collection<Person> personCollection = new ArrayList<Person>();
public Collection<Person> getPersonCollection() {
return personCollection;
}
public void setPersonCollection(Collection<Person> personCollection) {
this.personCollection = personCollection;
}
private Address address;
public Organization() {}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Address getAddress() {
return address;
}
public void setAddress(Address address) {
this.address = address;
}
}
And below is my Person entity:#Entity
#Table(name = "Person")
public class Person {
#Id
#Column(name="person_Id")
#GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
#Column(name="Email",unique = true)
private String email;
#Column(name="FirstName")
private String first_name;
#Column(name="LastName")
private String last_name;
#Column(name="Description")
private String description;
//#Embedded
private Address address;
#ManyToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
#JsonIgnore
private Organization organization;
public Organization getOrganization() {
return organization;
}
public void setOrganization(Organization organization) {
this.organization = organization;
}
public Person() {}
public Address getAddress() {
return address;
}
public void setAddress(Address address) {
this.address = address;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getFirst_name() {
return first_name;
}
public void setFirst_name(String first_name) {
this.first_name = first_name;
}
public String getLast_name() {
return last_name;
}
public void setLast_name(String last_name) {
this.last_name = last_name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}
when trying to create person. Below is my create method:
public Person createPerson(String f_name, String l_name, String email, String city, String state,
String zipCode, String street, String description, Long id) {
Person person = null;
//f_name, l_name, email are required parameters if empty return null and throws an exception..
if(f_name.isEmpty() || l_name.isEmpty() || email.isEmpty()) {
return person;
}
else {
Session session = null;
Transaction transaction = null;
try {
session = sessionFactory.openSession();
transaction = session.beginTransaction();
person = new Person();
person.setFirst_name(f_name);
person.setLast_name(l_name);
person.setEmail(email);
person.setDescription(description);
Address address = new Address();
address.setStreet(street);
address.setZipCode(zipCode);
address.setState(state);
address.setCity(city);
person.setAddress(address);
/* checks to see if id of organization exist if so add to list if not don't do anything.*/
if(id!=null) {
Organization organization = session.get(Organization.class, id);
if (organization != null) {
/* adds id of organization to person table and vice versa.*/
person.setOrganization(organization);
organization.getPersonCollection().add(person);
} else {
//do nothing
}
}
session.save(person);
transaction.commit();
} catch (HibernateException ex) {
if (transaction != null)
transaction.rollback();
ex.printStackTrace();
} finally {
if (session != null)
session.close();
}
return person;
}
}
I am able to create both person and organization and persist to database. But when i try to add an organization to a person Row in database i cannot add the relationship(verified when i tried looking up database itself) and also no response as i get a lazy initialization collection error as well. Please has anyone encountered this problem
I just executed the code snippet you gave in hibernate with the following simplified structure which works perfectly fine. You should start from here and modify as per your needs.
Entity
#Table(name="organization")
public class Organization {
#Id
#Column(name="org_Id")
private long id;
private String name, description;
#OneToMany(cascade = CascadeType.ALL)
private Collection<Person> personCollection = new ArrayList<Person>();
public Collection<Person> getPersonCollection() {
return personCollection;
}
public void setPersonCollection(Collection<Person> personCollection) {
this.personCollection = personCollection;
}
public Organization() {}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}
and
#Entity
#Table(name = "Person")
public class Person {
#Id
#Column(name="person_Id")
private long id;
#Column(name="Email",unique = true)
private String email;
#Column(name="FirstName")
private String first_name;
#Column(name="LastName")
private String last_name;
#Column(name="Description")
private String description;
#ManyToOne()
private Organization organization;
public Organization getOrganization() {
return organization;
}
public void setOrganization(Organization organization) {
this.organization = organization;
}
public Person() {}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getFirst_name() {
return first_name;
}
public void setFirst_name(String first_name) {
this.first_name = first_name;
}
public String getLast_name() {
return last_name;
}
public void setLast_name(String last_name) {
this.last_name = last_name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}
EDIT : The CascadeType.ALL from Person side of the relationship has been moved to the Organization side of the relationship.Because you want when organization is deleted Person should also get deleted, but not the other way round.
Related
I want a Bi-Directional mapping on my 2 Entities(PersonDetail,
PassportDetail) but it seems that it doesn't work fine. I want that
PersonDetail has a PassportId and PassportDetail has a PersonId as well.
My PersonDetail java Code
#Entity
#Table(name="persondetail")
public class PersonDetail {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
#Column(name="person_id")
private int id;
#Column(name="person_name")
private String name;
#Column(name="person_phone")
private long phone;
#OneToOne(mappedBy="person",cascade=CascadeType.ALL)
#JoinColumn(name="passport_id")
private PassportDetail passport;
public PassportDetail getPassport() {
return passport;
}
public void setPassport(PassportDetail passport) {
this.passport = passport;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public long getPhone() {
return phone;
}
public void setPhone(long phone) {
this.phone = phone;
}
#Column(name="passport_id")
private int passort_id;
public int getPassort_id() {
return passort_id;
}
public void setPassort_id(int passort_id) {
this.passort_id = passort_id;
}
}
Here is my PassportDetail Java Code
#Entity
#Table(name="PassportDetail")
public class PassportDetail {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
#Column(name="passport_id")
private int id;
#Column(name="passport_number")
private String passportNumber;
#Column(name="country_name")
private String country;
#Column(name="issue_date")
#Temporal(TemporalType.DATE)
private Date date;
#OneToOne
#JoinColumn(name="person_id")
private PersonDetail person;
public String getPassportNumber() {
return passportNumber;
}
public void setPassportNumber(String passportNumber) {
this.passportNumber = passportNumber;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
public PersonDetail getPerson() {
return person;
}
public void setPerson(PersonDetail person) {
this.person = person;
}
}
Here is the Output in MySql
Here is the Output of Both table as you can clearly see the problem i.e PersonDetail has a column named passport_id but it dosesn't have any value
Here is the insertion code
public class MappingMain {
public static void main(String[] args) {
PersonDetail person=new PersonDetail();
PassportDetail passport = new PassportDetail();
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-mm-dd");
person.setName("Ankit");
person.setPhone(790148565);
passport.setCountry("india");
try {
passport.setDate(sdf.parse("2018-04-15"));
}
catch(Exception e)
{
}
passport.setPassportNumber("QUJMZ123");
passport.setPerson(person);
person.setPassport(passport);
PersonDao dao=new PersonDao();
dao.save(person);
}
Here is the DAO class
public class MappingDao {
SessionFactory sf=Util.getSessionFactory();
public void save(UserDemo user)
{
Session session=sf.openSession();
session.beginTransaction();
session.save(user);
session.getTransaction().commit();
session.close();
}
}
I just want to explain following scenario.
I have Registration table for employee
It has one field like BranchAddress, and I have using table Branch for that with ManyToOne mapping.
#Entity
#Table(name = "temp_reg")
public class TemporaryRegistrationDTO {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private int ID;
#Column(name = "first_name")
private String firstName;
#Column(name = "last_name")
private String lastName;
#ManyToOne(cascade=CascadeType.ALL)
private BranchDTO companyBranch;
public BranchDTO getCompanyBranch() {
return companyBranch;
}
public void setCompanyBranch(BranchDTO companyBranch) {
this.companyBranch = companyBranch;
}
public int getID() {
return ID;
}
public void setID(int iD) {
ID = iD;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
}
#Entity
#Table(name = "company_branch")
public class BranchDTO {
#Id
#GeneratedValue ( strategy = GenerationType.AUTO)
private int branchID;
public int getBranchID() {
return branchID;
}
public void setBranchID(int branchID) {
this.branchID = branchID;
}
#ManyToOne(cascade=CascadeType.ALL)
private CountriesDTO country;
#ManyToOne(cascade=CascadeType.ALL)
private StatesDTO state;
public CountriesDTO getCountry() {
return country;
}
public void setCountry(CountriesDTO country) {
this.country = country;
}
public StatesDTO getState() {
return state;
}
public void setState(StatesDTO state) {
this.state = state;
}
}
#Entity
#Table(name = "company_countries")
public class CountriesDTO {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private int id;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
private String countryCode;
public String getCountryCode() {
return countryCode;
}
public void setCountryCode(String countryCode) {
this.countryCode = countryCode;
}
private String countryName;
public String getCountryName() {
return countryName;
}
public void setCountryName(String countryName) {
this.countryName = countryName;
}
}
#Entity
#Table(name = "company_states")
public class StatesDTO {
#Id
#GeneratedValue ( strategy = GenerationType.AUTO)
private int state_id;
private String state;
private String stateCode;
public String getState() {
return state;
}
public void setState(String state) {
this.state = state;
}
public String getStateCode() {
return stateCode;
}
public void setStateCode(String stateCode) {
this.stateCode = stateCode;
}
#Override
public String toString() {
return "StatesDTO [statesID=" + state_id + ", state=" + state + ", stateCode=" + stateCode + "]";
}
public int getState_id() {
return state_id;
}
public void setState_id(int state_id) {
this.state_id = state_id;
}
}
Now, What I want is that, whenever their is request for registration, Firstly I am checking if Branch Address is available in the Branch table. If it contains an entry already, then it will retrieve Branch row and stooping from same data to Branch Table
Now, to check for BranchDTO, I have created method in Branch Repository class.
#Query("from BranchDTO where country = :country and state = :state")
public BranchDTO existsEntry(#org.springframework.data.repository.query.Param("country") CountriesDTO country,#org.springframework.data.repository.query.Param("state") StatesDTO state);
But It reflects me following error,
object references an unsaved transient instance - save the transient instance before flushing: com.example.demo.pojo.CountriesDTO
Thank you guys
Say I have a SQL DO named "Team" that has a name, description, id, and profile picture.
It would look something like this:
#Entity
#Table(name = "Team")
public class TeamDO implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name="team_id")
private Long id;
private String description;
private String name;
#ManyToOne(fetch=FetchType.EAGER)
#JoinColumn(name="user_id", nullable = false)
private Users users;
public TeamDO() {}
public TeamDO(Users user) {
this.setUsers(user);
}
#Override
public String toString() {
return String.format(
"TeamDO[id=%d, inital='%s', description='%s', name='%s']"
, getId()
, getUsers().getInitialName()
, getDescription()
, getName()
);
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Users getUsers() {
return users;
}
public void setUsers(Users users) {
this.users = users;
}
}
What kind of variable stores a file such as a jpg? Or would my POJO have a String profilePictureURL which would be used to fetch the image (logo) for each team?
It's preferred to store the file in a hosting service of some sort and save only the URL in the DB but you can also save it as a byte array.
I want make a case, when user is authenticated by Spring Security and then he fill adres form I would like to automatically updated a foreign key column "adres_id" in user table. Please give me a tip how implement this in the most popular way
I how somethig like this
Address Table:
User Table:
Adres
#Entity
#Table(name="adres")
public class Adres {
#Id
#GeneratedValue(strategy = GenerationType.AUTO )
int id;
#Column(name="country", nullable=false)
private String country;
private String street;
private String postcode;
private String telephone;
private String pesel;
#OneToOne(mappedBy ="adres")
private User user;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getPostcode() {
return postcode;
}
public void setPostcode(String postcode) {
this.postcode = postcode;
}
public String getTelephone() {
return telephone;
}
public void setTelephone(String telephone) {
this.telephone = telephone;
}
public String getPesel() {
return pesel;
}
public void setPesel(String pesel) {
this.pesel = pesel;
}
public String getStreet() {
return postcode;
}
public void setStreet(String street) {
this.street = street;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
}
User
#Entity
#Table(name="users")
public class User {
#Id
#GeneratedValue(strategy = GenerationType.AUTO )
int id;
#Column(name="username", nullable=false)
private String username;
private String password;
private String email;
private Boolean enabled;
#OneToOne(cascade = CascadeType.ALL)
private Adres adres;
public Boolean getEnabled() {
return enabled;
}
public void setEnabled(Boolean enabled) {
this.enabled = enabled;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
}
AdresDAO
#Repository
#Transactional
public class AdresDAOImpl implements AdresDAO{
#Autowired
SessionFactory sessionFactory;
public void addAdres(Adres adres) {
sessionFactory.getCurrentSession().save(adres);
}
public List<Adres> listAdres() {
return sessionFactory.getCurrentSession().createQuery("from Adres order by id").list();
}
public void removeAdres(int id) {
Adres adres = (Adres) sessionFactory.getCurrentSession().load(
Adres.class, id);
if (null != adres) {
sessionFactory.getCurrentSession().delete(adres);
}
}
public Adres getAdres(int id) {
return (Adres)sessionFactory.getCurrentSession().get(Adres.class, id);
}
public void editAdres(Adres adres) {
sessionFactory.getCurrentSession().update(adres);
}
}
AdresService
#Service
public class AdresServiceImpl implements AdresService{
#Autowired
AdresDAO adresDAO;
#Transactional
public void addAdres(Adres adres) {
adresDAO.addAdres(adres);
}
#Transactional
public void editAdres(Adres adres) {
adresDAO.editAdres(adres);
}
#Transactional
public List<Adres> listAdres() {
return adresDAO.listAdres();
}
#Transactional
public void removeAdres(int id) {
adresDAO.removeAdres(id);
}
#Transactional
public Adres getAdres(int id) {
return adresDAO.getAdres(id);
}
}
User unidirectional relation between User and Address if Address object does not supposed to know about its owner (generally it does not). I would prefer user id in Address table if a User have more than one Address (one-to-many relation).
But for your question you may design like that,
public class User{
...
#OneToOne(CascadeType.REMOVE)//this is for to remove address when user is removed
#JoinColumn(name="HOME_ADDRESS_ID")
private Address address;
...
}
and
public class Address {
#Id
#GeneratedValue(strategy = GenerationType.AUTO )
int id;
#Column(name="country", nullable=false)
private String country;
private String street;
private String postcode;
private String telephone;
private String pesel;
//no user object here
public int getId() {
return id;
}
...
}
Hi I can't get merge working it only makes new record but don't update record
EDIT:
Object:
#Entity(name = "ALLEGRO_TRANSACTION")
public class AllegroTransactionImpl implements AllegroTransaction{
#Id
#Column(name = "ID")
#GeneratedValue(strategy = GenerationType.AUTO)
protected Long id;
#Column(name = "ALIEXPRESS_NUMBER")
protected String aliexpressNumber;
#Column(name = "CREATE_DATE")
protected Date createDate;
#OneToOne(optional = true, targetEntity = PaymentTypeImpl.class)
#JoinColumn(name = "PAYMENT_ID")
protected PaymentTypeImpl paymentType;
#Column(name = "FIRST_NAME")
protected String firstName;
#Column(name = "LAST_NAME")
protected String lastName;
#Column(name = "PRICE")
protected float price;
#Column(name = "EMAIL")
protected String email;
#Column(name = "PHONE", nullable = true)
protected String phone;
#Column(name = "ADDRESS", columnDefinition="LONGTEXT")
protected String address;
#Column(name = "ATTENTION", columnDefinition="LONGTEXT")
protected String attention;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getAliexpressNumber() {
return aliexpressNumber;
}
public void setAliexpressNumber(String aliexpressNumber){
this.aliexpressNumber = aliexpressNumber;
}
public Date getCreateDate() {
return createDate;
}
public void setCreateDate(Date createDate) {
this.createDate = createDate;
}
public PaymentTypeImpl getPaymentType() {
return paymentType;
}
public void setPaymentType(PaymentTypeImpl paymentType) {
this.paymentType = paymentType;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public float getPrice() {
return price;
}
public void setPrice(float price) {
this.price = price;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getAttention() {
return attention;
}
public void setAttention(String attention) {
this.attention = attention;
}
}
Manager:
#Service
public class AllegroTransactionService {
private final static Logger logger = Logger.getLogger(AllegroTransactionService.class);
#PersistenceContext( unitName = "allegroTransactionPersistenceUnit", type= PersistenceContextType.EXTENDED )
protected EntityManager em;
public List<AllegroTransactionImpl> readAllegroTransactionByCreateDate()
{
Query query = this.em.createQuery( "SELECT allegroTransaction FROM com.springapp.mvc.classes.AllegroTransactionImpl allegroTransaction ORDER BY createDate DESC" );
return query.getResultList();
}
#Transactional
public AllegroTransactionImpl saveAllegroTransaction(AllegroTransactionImpl allegroTransaction)
{
this.em.merge( allegroTransaction );
return allegroTransaction;
}
}
Still can't get this working ... Maybe you guys figure something out ? Entity manager works i can easly get readAllegroTransaction function working but merge don't work - its create another object.
Problem was not passing correctly ID parameter