My entities are as follows
Office
#Entity
public class Office {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
private int latitude;
private int longitude;
private String buildingName;
// getters and setters omitted for brevity
}
Point - which is an EmbeddedId
#Embeddable
public class Point implements Serializable {
private int latitude;
private int longitude;
// getters and setters omitted for brevity
}
Location
#Entity
public class Location {
#EmbeddedId
private Point point;
private String country;
#OneToOne // How to add a OneToOne Mapping
private Office office;
// getters and setters omitted for brevity
}
Question:
I want to add a one-to-one mapping between the Office and the Location entity.
What I've tried:
I added the following annotations along with #OneToOne mapping in the Location entity
#JoinColumn(name = "latitude", referencedColumnName = "latitude")
#JoinColumn(name = "longitude", referencedColumnName = "longitude")
but I got the following error
Provided id of the wrong type for class com.example.demo.entity.employee.o2m_cpk.Office. Expected: class java.lang.Integer, got class com.example.demo.entity.employee.o2m_cpk.Point
Use the following mappings:
#Entity
public class Office {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
#OneToOne(mappedBy = "office")
private Location location;
private String buildingName;
}
#Embeddable
public class Point implements Serializable {
private int latitude;
private int longitude;
}
#Entity
public class Location {
#EmbeddedId
private Point point;
private String country;
#OneToOne
private Office office;
}
Related
I'm using Hibernate in my spring project. But It doesn't work for One-To-One relationships. It gives me the below error.
Unable to build Hibernate SessionFactory; nested exception is org.hibernate.MappingException: Could not determine type for: com.example.TransfertNational.model.Client, at table: ComptePaiement, for columns: [org.hibernate.mapping.Column(client)]
I have ran some searches in the internet, but it doesn't work for me.
the Client Entity :
#Data #Entity
#AllArgsConstructor #NoArgsConstructor #ToString
public class Client {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private int id;
private String typeTransfert;
private String typePiece;
private String cin;
private String sexe;
private String prenom;
private String typePieceIdentite;
private String paysEmission;
private String numPI;
private String validitePI;
private String dateNaissance;
private String profession;
private String nationalite;
private String paysAdresse;
private String adresseLegale;
private String ville;
private String gsm;
private String email;
#OneToMany(fetch = FetchType.LAZY,
cascade = CascadeType.ALL)
private Set<Beneficiaire> beneficiares;
#OneToOne(fetch = FetchType.LAZY,
cascade = CascadeType.ALL)
private ComptePaiement comptePaiement;
}
the ComptePaiement Entity :
#Data
#Entity
#AllArgsConstructor
#NoArgsConstructor
#ToString
public class ComptePaiement {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private int id;
private String solde;
private String rip;
private Client client;
}
Answer from comments:
You are probably missing #JoinColumn on Client or ComptePaiement and mappedBy in #OneToOne annotation, depending which will hold reference id in database.
I have Sensor Entity has Relationship to Location Entity
#RequiredArgsConstructor
#Data
public class TemperatureSensor {
#Id
#GeneratedValue(strategy = AUTO)
private Long id;
private float temperature;
private float min;
private float max;
private float timeInterval;
private boolean activityState;
#OneToOne
private Location location;
}
#Entity
#Data
#RequiredArgsConstructor
public class Location {
#Id
#GeneratedValue(strategy = AUTO)
private Long id;
private Long coordinates;
private String name;
private EnvironmentState environmentState = EnvironmentState.NORMAL_CASE;
#OneToOne
private TemperatureSensor temperatureSensor;
}
I created two endpoints to initiate each entity, so I send Sensor object using Postman like this and get location_id null in the database.
The same is happening with Location.
{
"temperature" : "15.2",
"min" :"9.0",
"max" : "20.0",
"timeInterval" : "552.5",
"activityState" : "true",
"location_id" :"1"
}
Also, I tried to send location object and I got the exception: object references an unsaved transient instance - save the transient instance before flushing
{
"temperature" : "15.2",
"min" :"9.0",
"max" : "20.0",
"timeInterval" : "552.5",
"activityState" : "true",
"location" :{"coordinates": "123","name" : "loc01"}
}
The issue seems to be that you are missing cascade options on your #OneToOne annotations. Try using #OneToOne(cascade = CascadeType.ALL) instead (this will cascade all operations PERSIST, MERGE, REMOVE, REFRESH, DETACH to the other entity).
#RequiredArgsConstructor
#Data
public class TemperatureSensor {
#Id
#GeneratedValue(strategy = AUTO)
private Long id;
private float temperature;
private float min;
private float max;
private float timeInterval;
private boolean activityState;
#OneToOne(cascade = CascadeType.ALL)
private Location location;
}
Entity
#Data
#RequiredArgsConstructor
public class Location {
#Id
#GeneratedValue(strategy = AUTO)
private Long id;
private Long coordinates;
private String name;
private EnvironmentState environmentState = EnvironmentState.NORMAL_CASE;
#OneToOne(cascade = CascadeType.ALL)
private TemperatureSensor temperatureSensor;
}
I use OneToOne in the spring data JPA and I want to delete a record from the Address table without touching the user. But I can't.
If I remove User, in this case Address is removed, that's good.
But how can you delete an Address without touching the User?
https://github.com/myTestPercon/TestCascade
User.Java
#Entity
#Table(name = "user", schema = "testCascade")
public class User implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
private Long id;
#Column(name = "name")
private String name;
#OneToOne(mappedBy = "user", cascade = CascadeType.ALL)
private Address address;
// Getter and Setter ...
}
Address.java
#Entity
#Table(name = "address", schema = "testCascade")
public class Address implements Serializable {
#Id
private Long id;
#Column(name = "city")
private String city;
#OneToOne
#MapsId
#JoinColumn(name = "id")
private User user;
// Getter and Setter ...
}
DeleteController.java
#Controller
public class DeleteController {
#Autowired
ServiceJpa serviceJpa;
#GetMapping(value = "/deleteAddressById")
public String deleteAddressById () {
serviceJpa.deleteAddressById(4L);
return "redirect:/home";
}
}
You got your mapping wrong thats all is the problem .
try the below and see
User.java
#Entity
#Table(name = "user", schema = "testCascade")
public class User implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
private Long id;
#Column(name = "name")
private String name;
#OneToOne(cascade=CascadeType.ALL)
#JoinColumn(name="foriegn key column in user table for address example.. address_id")
private Address address;
// Getter and Setter ...
}
Address.java
#Entity
#Table(name = "address", schema = "testCascade")
public class Address implements Serializable {
#Id
private Long id;
#Column(name = "city")
private String city;
//name of the address variable in your user class
#OneToOne(mappedBy="address",
cascade={CascadeType.DETACH, CascadeType.MERGE, CascadeType.PERSIST,
CascadeType.REFRESH})
private User user;
// Getter and Setter ...
}
In order to solve this problem, you need to read the hibernate Documentation Hibernate Example 162, Example 163, Example 164.
And also I recommend to look at this is Using #PrimaryKeyJoinColumn annotation in spring data jpa
This helped me in solving this problem.
And also you need to specify the parameter orphanRemoval = true
User.java
#Entity(name = "User")
#Table(name = "user", schema = "testother")
public class User implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
private Long id;
#Column(name = "name")
private String name;
#OneToOne(mappedBy = "user", cascade = CascadeType.ALL, orphanRemoval = true)
private Address address;
public void addAddress(Address address) {
address.setUser( this );
this.address = address;
}
public void removeAddress() {
if ( address != null ) {
address.setUser( null );
this.address = null;
}
}
// Getter and Setter
}
Address.java
#Entity(name = "Address")
#Table(name = "address", schema = "testother")
public class Address implements Serializable {
#Id
private Long id;
#Column(name = "city")
private String city;
#OneToOne
#MapsId
#JoinColumn(name = "id")
private User user;
// Getter and Setter
}
DeleteController .java
#Controller
public class DeleteController {
#Autowired
ServiceJpa serviceJpa;
#GetMapping(value = "/deleteUser")
public String deleteUser () {
User user = serviceJpa.findUserById(2L).get();
user.removeAddress();
serviceJpa.saveUser(user);
return "/deleteUser";
}
}
Or make a custom SQL query.
#Repository
public interface DeleteAddress extends JpaRepository<Address, Long> {
#Modifying
#Query("delete from Address b where b.id=:id")
void deleteBooks(#Param("id") Long id);
}
public class Address {
#Id
private Long id;
#MapsId
#JoinColumn(name = "id")
private User user;
}
Rename #JoinColumn(name = "id") to #JoinColumn(name = "user_id")
You can't say that the column that will point to user will be the id of the Address
I am getting this error .
Cannot call sendError() after the response has been committed
Can someone help me figure out why?.
#Entity
public class Product {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
#OneToOne(
fetch = FetchType.LAZY,
cascade = CascadeType.ALL
)
#JoinColumn(name = "details_id")
private Details details;
//Getters and setters left out for brevity
}
#Entity
public class Details {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
private String name;
private String description;
private float price;
private float discount;
#OneToOne(mappedBy = "details")
private Product product;
}
#RestController
public class ProductController {
#Autowired
ProductRepository productRepository;
#GetMapping("/getAllProducts")
public Iterable<Product> getAllProducts(){
return productRepository.findAll();
}
}
#RestController
public class DetialsController {
#Autowired
ProductRepository productRepository;
#Autowired
DetailsRepository detailsRepository;
#PostMapping("/details")
public Details addDetails(#RequestBody Details details) {
Product newProduct = new Product();
newProduct.setDetails(details);
productRepository.save(newProduct);
return detailsRepository.save(details);
}
}
I am able to make the POST call to /details; for adding details successfully. But when i make GET call to /getAllProducts, I am getting this error
Cannot call sendError() after the response has been committed
This is an issue with bidirectional relationships, as they hold references to each other, at deserialization, Jackson runs in an infinite loop. My first suggestion would be adding #JsonIgnore to one end of the relation.
#OneToOne(mappedBy = "details")
#JsonIgnore
private Product product;
Afterward, if that solved your issue, you can look over #JsonManagedReference/#JsonBackReference and #JsonIdentityInfo.
You can also look over this link for more insight
You can use this :
#Entity
public class Product {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
#JsonBackReference(value = "details_id")
#OneToOne(
fetch = FetchType.LAZY,
cascade = CascadeType.ALL
)
#JoinColumn(name = "details_id")
private Details details;
//Getters and setters left out for brevity
}
#Entity
public class Details {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
private String name;
private String description;
private float price;
private float discount;
#JsonManagedReference(value = "details")
#OneToOne(mappedBy = "details",,cascade=CascadeType.ALL)
private Product product;
}
I want to create an entity X with atributes.
Everything is right except the attribute "permissions" :
public class X implements Serializable{
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private Long idNotateur;
#NotEmpty
private String nomNotateur;
#NotEmpty
private String prenomNotateur;
#NotEmpty
private String fonctionNotateur;
#NotEmpty
private String userNotateur;
#NotEmpty
private String passNotateur;
#ManyToOne
#JoinColumn(name="id_poste")
private Poste poste;
#ManyToOne
#JoinColumn(name="id_dir")
private Direction direction;
#OneToMany(mappedBy="notateur")
private Collection<Employe> Employes;
private Collection<Long> permissions;
getters & setters ...
public Collection<Long> getPermissions() {
return permissions;
}
public void setPermissions(Collection<Long> permissions) {
this.permissions = permissions;
}
}
Then I came across the following error: Caused by: org.hibernate.MappingException: Could not determine type for: java.util.Collection, at table: X, for columns: [org.hibernate.mapping.Column(permissions)]
So how to solve it?
I'm using Spring MVC Hibenate