I am not quit famililar with relationship between table,but i want to make a one-to-one relationship with table history and news.What i want is when the news is deleted, the history will also be deleted by on the news_id.But it give an error when i set the entity like this:
error:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is java.lang.NullPointerException: Cannot invoke "org.hibernate.mapping.PersistentClass.getTable()" because "classMapping" is null
My News:
#Id
#GeneratedValue
#OneToOne(cascade = {CascadeType.REMOVE})
#JoinColumn(name = "History_news_id")
private int id;
private String title;
private String Url;
private String content;
private String image;
private LocalDate date;
private int category;
My History:
#Id
#GeneratedValue
private int id;
private String username;
private int user_id;
#OneToOne(mappedBy = "History")
private int news_id;
private LocalDate date;
private String title;
Related
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.AnnotationException: Associations marked as mappedBy must not define database mappings like #JoinTable or #JoinColumn: com.company.entities.Customer.address
#Entity
#Table(name="Customers")
public class Customer {
#Id
#Column(name="customer_Id")
private int customerid;
#Column(name="Customer_Name")
private String name;
#Column (name="Customer_email")
private String email;
#Column(name="Mobile_No")
private int mobilNo;
#OneToMany(cascade= CascadeType.ALL,mappedBy="customer")
#JoinTable(name="Customer",joinColumns={
#JoinColumn(name="customer_Id", referencedColumnName="customerid")
},
inverseJoinColumns={
#JoinColumn(name="address_Id",referencedColumnName="addId")
})
private Map<String,Address> address=new HashMap<>();
#Entity
public class Address {
#Id
private int addId;
private String StreetName;
private String city;
private String state;
#ManyToOne(cascade=CascadeType.ALL)
private Customer customer;
}
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 am new to Hibernate, I have written a entity class as below as per the table definition:
#Embeddable
class APK implements Serializable {
private String bId;
private int version; <---THIS IS CAUSING PROBLEM
}
#Entity
#Table(name = "a")
public class A implements Serializable {
private static final long serialVersionUID = 1L;
#EmbeddedId
private APK aPK;
#MapsId("bId")
#ManyToOne
#JoinColumn(name = "b_id", referencedColumnName = "id")
private B b;
#MapsId("version")
#Column(name = "version")
private int version;
#Column(name = "name")
private String name;
}
While, I am starting the server, I am getting following exception:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name
'entityManagerFactory' defined in class path resource
[org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation
of init method failed; nested exception is org.hibernate.AnnotationException: Unknown entity
name: int
In table definition type of version is int. But to fix this I even tried to change the version type to Long, Integer but always I am getting similar error. Any idea how should I fix this issue ?
Remove #MapsId("version") annotation from private int version;, cause int is not an Entity. Refer here for more details.
I have two entities and mapped those using many-to-one annotation but after writing a query for find object using another table id I got an error when I commented out that line and method called to that application work but I want to implement that functionality and please help me
These are my entity classes:
#Entity
#Table(name = "Contract")
public class Contract implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "contractId")
private long contractId;
#Column(name="start_date")
private Date st_date;
#Column(name="end_date")
private Date end_date;
#ManyToOne(fetch = FetchType.LAZY, optional = false)
#JoinColumn(name = "hotel_id", nullable = false)
#OnDelete(action = OnDeleteAction.CASCADE)
#JsonIgnore
private Hotel hotel;
// getters and setters
Second entity
#Entity
#Table(name="Hotel")
public class Hotel {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name="hotel_id")
private long hotel_id;
#Column(name="hotel_name")
private String hotel_name;
#Column(name="hotel_location")
private String hotel_location;
#Column(name="hotel_email")
private String hotel_email;
#Column(name="hotel_telephone")
private String hotel_telephone
// getters and setters
My contract service class
#Service
public class ContractService {
#Autowired
private ContractRepository contractRepository;
#Autowired
private HotelRepository hotelRepository;
public List<Contract> getAllContracts(){
return contractRepository.findAll();
}
public List<Contract> findByHotelId(Long hotelId,Pageable pageable){
return contractRepository.findByHotelId(hotelId, pageable);
}
public ResponseEntity<?> deleteContract(Long hotelId, Long contractId)
{
return contractRepository.findByIdAndHotelId(contractId,
hotelId).map(Contract -> {
contractRepository.delete(Contract);
return ResponseEntity.ok().build();
}).orElseThrow(() -> new ResourceNotFoundException("Comment not found
with ContractId " + contractId + " and hotelId " + hotelId));
}
My contract repository
#Repository
public interface ContractRepository extends JpaRepository<Contract, Long> {
List<Contract> findByHotelId(Long hotelId, Pageable pageable);
Optional<Contract> findByIdAndHotelId(Long id, Long hotelId);
}
I got this error when running my project
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'contractController': Unsatisfied dependency expressed through field 'contractService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'contractService': Unsatisfied dependency expressed through field 'contractRepository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'contractRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract java.util.List com.sunTravel.sunRest.repository.ContractRepository.findByHotelId(java.lang.Long,org.springframework.data.domain.Pageable)! No property id found for type Hotel! Traversed path: Contract.hotel.
First Solution: based on your stack trace, Spring data is looking for id variable (primary key) in your Hotel class. So please change private long hotel_id; to private long id;
Another solution (no need to change anything just add your own query):
write your own JPA query using #Query.
Example:
#Query("SELECT contract from Contract as contract where contract.hotel.hotel_id = :hotelId")
List<Contract> findByHotelId(Long hotelId, Pageable pageable);
You should rename your Primary Key from hotel_id to id then only your repository method will work.
#Entity
#Table(name="Hotel")
public class Hotel {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name="hotel_id")
private long id;
#Column(name="hotel_name")
private String hotel_name;
#Column(name="hotel_location")
private String hotel_location;
#Column(name="hotel_email")
private String hotel_email;
#Column(name="hotel_telephone")
private String hotel_telephone
// getters and setters
im new to Spring and hibernate, i got the error above when trying to persist the transaction data. please try to help this problem
Here's my Entity:
#Entity #NamedQuery(name="Employee.findAll", query="SELECT e FROM Employee e")
public class Employee implements Serializable{
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private int id;
private String city;
private String civil;
#Temporal(TemporalType.DATE)
#Column(name="dob", length=11)
private Date dob;
private String email;
private int epf;
private String fname;
private String gender;
private int landtp;
private String lname;
#Temporal(TemporalType.DATE)
#Column(name="salaryincrement", length=11)
//bi-directional many-to-one association to Designation
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name="designation_id", nullable=false)
private Designation designation;
public Employee() { }
#Entity
#NamedQuery(name="Designation.findAll", query="SELECT d FROM Designation d")
public class Designation implements Serializable{
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private int id;
private String type;
//bi-directional many-to-one association to Employee
#OneToMany(mappedBy="designation")//, cascade=CascadeType.ALL
private List<Employee> employees;
public Designation() {
}
this is my Entity class,
Entities have a getters ans setters
designation is set nullable = false. However employees variable isn't initialized in Designation. So, you'll have to initialize as
#OneToMany(mappedBy="designation")//, cascade=CascadeType.ALL
private List<Employee> employees = new LinkedList<>();
I'm not sure that you can go with primitive type int as your Id - you should probably use Integer - because int has default zero value and cannot be null, your new record can be rather seen as a detached entity with Id ZERO and not as a transient one.
The same mistake is in Designation class.
See Primitive or wrapper for hibernate primary keys