When I run this code, it is running with out error. But When I check the values, as you can see, In the "Tbl_InstructorDetail" table the parentId is null
can anyone help.
thank you.
This is my Entities and my main class with table relation
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this is my tables from my database
create table Tbl_Instructor
(
uuid int identity
constraint Pk_Tbl_Instructor_uuid
primary key,
Title nvarchar(50)
)
create table Tbl_InstructorDetail
(
uuid int identity
constraint Pk_Tbl_InstructorDetail_uuid
primary key,
Created_By nvarchar(50),
parentId int
constraint Fk_Tbl_InstructorDetail_Tbl_Instructor
references Tbl_Instructor
)
#Entity
#Table(name = "Tbl_InstructorDetail", schema = "dbo", catalog = "OJT_2021_KST")
public class TblInstructorDetailEntity {
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Id
#Column(name = "uuid", nullable = false)
private int uuid;
#Basic
#Column(name = "Created_By", nullable = true, length = 50)
private String createdBy;
#Basic
#Column(name = "parentId", nullable = true,insertable = false,updatable = false)
private Integer parentId;
#OneToOne
#JoinColumn(name = "parentId",referencedColumnName="uuid")
private TblInstructorEntity instructorEntity;
#Entity
#Table(name = "Tbl_Instructor", schema = "dbo", catalog = "OJT_2021_KST")
public class TblInstructorEntity {
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Id
#Column(name = "uuid", nullable = false)
private int uuid;
#Basic
#Column(name = "Title", nullable = true, length = 50)
private String title;
#OneToOne(mappedBy="instructorEntity",cascade = CascadeType.ALL)
private TblInstructorDetailEntity detailEntity;
Main class
TblInstructorEntity instructor = new TblInstructorEntity();
instructor.setTitle("This is a Test");
TblInstructorDetailEntity detail = new TblInstructorDetailEntity();
detail.setCreatedBy("Kyle");
instructor.setDetailEntity(detail);
session.getTransaction().begin();
session.save(instructor);
session.getTransaction().commit();
You don't need to add parentId in TblInstructorDetailEntity because it's referenced from TblInstructorEntity. In main class foreign key pass null because you can take a reference to the parent table before save parent table.
Here down is modified code:
Entity
#Entity
#Table(name = "Tbl_InstructorDetail", schema = "dbo", catalog = "OJT_2021_KST")
public class TblInstructorDetailEntity {
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Id
#Column(name = "uuid", nullable = false)
private int uuid;
#Basic
#Column(name = "Created_By", nullable = true, length = 50)
private String createdBy;
// remove parentId column because it is foreign key
#OneToOne
#JoinColumn(name = "parentId",referencedColumnName="uuid")
private TblInstructorEntity instructorEntity;
// getter setter
}
#Entity
#Table(name = "Tbl_Instructor", schema = "dbo", catalog = "OJT_2021_KST")
public class TblInstructorEntity {
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Id
#Column(name = "uuid", nullable = false)
private int uuid;
#Basic
#Column(name = "Title", nullable = true, length = 50)
private String title;
#OneToOne(mappedBy="instructorEntity",cascade = CascadeType.ALL)
private TblInstructorDetailEntity detailEntity;
// getter setter
}
Main
Session session = HibernateUtil.getSessionFactory().openSession();
session.beginTransaction();
TblInstructorEntity instructor = new TblInstructorEntity();
instructor.setTitle("This is a Test");
TblInstructorDetailEntity detail = new TblInstructorDetailEntity();
detail.setCreatedBy("Kyle");
session.save(instructor); // Save parent entity
detail.setInstructorEntity(instructor); // Reference from parent entity
session.save(detail); // Save child entity
session.getTransaction().commit();
HibernateUtil.shutdown();
Related
I have a simple model:
#Entity
#Table(name = "doctor_data")
public class DoctorData {
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE)
#Column(name = "doctor_id")
private int id;
#Column(name = "first_name", nullable = false)
private String docName;
#ManyToOne
#JoinColumn(name = "user_id")
#JsonBackReference
private User user;
}
How can I pass the prepared value in "user_id" foreign key due DTO, or simple post request?
I have the following code for many to many or many to one relationship persistence using Spring JPA.
This is my repository test https://github.com/Truebu/testJpa.git
This class has three one-to-many relationships, but none work well
#Entity(name = "routine_assignament")
#Table(name = "routine_assignament")
public class RoutineAssignament {
#Id
#GeneratedValue(strategy = IDENTITY)
#Column(name = "id", updatable = false)
private Long id;
#Column(name = "date_start",nullable = true,columnDefinition = "DATE")
private Date date_start = new Date();
#Column(name = "date_end",nullable = true,columnDefinition = "DATE")
private Date date_end;
#ManyToOne
#JoinColumn(name = "id_user")
private User user;
#ManyToOne
#JoinColumn(name = "id_routine")
private Routine routine;
#OneToMany(mappedBy = "routine_assignament")
private Set<Score> scores = new HashSet<>();
#OneToMany(mappedBy = "routine_assignament")
private Set<Statistic> statistics = new HashSet<>();
#OneToMany(mappedBy = "routine_assignament")
private Set<KeepRoutine> keepRoutines = new HashSet<>();
The other classes
#Entity(name = "score")
#Table(name = "score")
public class Score {
#Id
#GeneratedValue(strategy = IDENTITY)
#Column(name = "id", updatable = false)
private Long id;
#Column(name = "commentary",nullable = false,columnDefinition = "TEXT", unique = true)
private String commentary;
#Column(name = "assessment",nullable = false,columnDefinition = "INT", unique = true)
private String assessment;
#ManyToOne
#JoinColumn(name = "id_routine_assignament")
private RoutineAssignament routineAssignament;
}
#Entity(name = "statistic")
#Table(name = "statistic")
public class Statistic {
#Id
#GeneratedValue(strategy = IDENTITY)
#Column(name = "id", updatable = false)
private Long id;
#Column(name = "time",nullable = false,columnDefinition = "TEXT", unique = true)
private String time;
#ManyToOne
#JoinColumn(name = "id_routine_assignament")
private RoutineAssignament routineAssignament;
}
and
#Entity(name = "keep_routine")
#Table(name = "keep_routine")
public class KeepRoutine {
#Id
#GeneratedValue(strategy = IDENTITY)
#Column(name = "id", updatable = false)
private Long id;
#ManyToOne
#JoinColumn(name = "id_routine_assignament")
private RoutineAssignament routineAssignament;
}
The entity relationship diagram is this:
My mistake is that it doesn't detect these relationships correctly.
When I run it it generates this:
Failed to initialize JPA EntityManagerFactory: mappedBy reference an unknown target entity property: com.example.demo.model.entities.KeepRoutine.routine_assignament in com.example.demo.model.entities.RoutineAssignament.keepRoutines
This error is reproduced with all three classes (KeepRoutine, Statistic and Score), I don't know why
Your OneToMany mapping is not appropriate. You need to use routineAssignament the property name instead of the table name routine_assignament as shown below. This property name is defined in the ManyToOne relationship.
#OneToMany(mappedBy = "routineAssignament")
private Set<Score> scores = new HashSet<>();
#OneToMany(mappedBy = "routineAssignament")
private Set<Statistic> statistics = new HashSet<>();
#OneToMany(mappedBy = "routineAssignament")
private Set<KeepRoutine> keepRoutines = new HashSet<>();
A Foreign key refering br.com.copagaz.inova.mobile.persistencia.entidade.viagem.nf.NFeProtocolo from br.com.copagaz.inova.mobile.persistencia.entidade.viagem.nf.NfCabeca has the wrong number of column. should be 2
My problem is in one column reference, if i remove #ManyToOne and #JoinColumn(name = "protocolo"), the system works but the selects does not.
i tried to use hibernate.hbm2ddl.auto to auto create the FKs but with no success.
I think the nfe_operacao use a composed PK, and nf_cabeca reference's ii, but did not work.
Any one could help?
#Entity
#Table(name = "nf_cabeca", schema = "mobile", uniqueConstraints =
{#UniqueConstraint(columnNames =
{"NUMERO_FILIAL","serie_nota","numero_nota"})})
public class NfCabeca implements java.io.Serializable {
private static final long serialVersionUID = -921687831233770627L;
#Id
#SequenceGenerator(name = "nf_cabeca_sequencial_seq", sequenceName = "nf_cabeca_sequencial_seq", schema = "mobile", allocationSize = 1, initialValue = 1)
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "nf_cabeca_sequencial_seq")
#Column(name = "sequencial", insertable = false, updatable = false)
private long sequencial;
#Temporal(TemporalType.TIMESTAMP)
#Column(name = "data_hora", nullable = false, length = 29)
private Date dataHora;
#Column(name = "valor_total", nullable = false, precision = 17, scale = 17)
private Double valorTotal;
#Column(name = "cancelada")
private Integer cancelada;
#Temporal(TemporalType.DATE)
#Column(name = "data_vencimento", length = 13)
private Date dataVencimento;
#Column(name = "boleto", length = 17)
private String boleto;
#ManyToOne
#JoinColumn(name = "protocolo")
private NFeProtocolo protocolo;
#Column(name = "chave")
private String chave;
#Column(name = "status_nf")
private Integer statusNf;
#Column(name = "status_danfe")
private Integer statusDanfe;
#Column(name = "modelo", length = 3)
private String modelo;
#Column(name = "reconciliada")
private boolean reconciliada = false;
#OneToMany(mappedBy = "nfCabeca", cascade = CascadeType.MERGE)
private List<NfObservacao> nfObservacao;
#OneToMany(mappedBy = "nfCabeca", cascade = CascadeType.ALL)
private List<NfItens> nfItens;
#OneToMany(cascade = CascadeType.ALL, orphanRemoval = true)
#JoinColumn(name = "nf_cabeca")
private List<NFeProtocolo> protocolos = new ArrayList<NFeProtocolo>();
}
This references this table:
#Entity
#IdClass(NFeProtocoloId.class)
#Table(name = "nfe_protocolo", schema = "mobile")
public class NFeProtocolo implements Serializable {
private static final long serialVersionUID = 2092981840170296102L;
#Id
#Column(name = "nf_cabeca", length = 100, insertable = false, updatable = false)
private long nf_cabeca_id;
#Id
#Column(name = "protocolo", length = 100)
private String protocolo;
#Column(name = "operacao", length = 15, nullable = false)
#Enumerated(EnumType.STRING)
private NFeProtocoloOperacao operacao;
#Temporal(TemporalType.TIMESTAMP)
#Column(name = "data_hora", length = 29, nullable = false)
private Date dataHora;
#Column(name = "status", length = 10)
private String status;
}
I think the problem is that your #ManyToOne mapping is not correctly declared. As the the entity NFeProtocolo has a composite primary key, you should use #JoinColumns annotation that consists of an array of #JoinColumn annotations:
#ManyToOne
#JoinColumns({#JoinColumn(name = "nf_cabeca_id", referncedColumnName="nf_cabeca_id"),
#JoinColumn(name= "protocolo", referencedColumnName="protocolo")})
private NFeProtocolo protocolo;
You can choose an appropriate name as a foreign key column name.
A Foreign key refering br.com.copagaz.inova.mobile.persistencia.entidade.viagem.nf.NFeProtocolo from br.com.copagaz.inova.mobile.persistencia.entidade.viagem.nf.NfCabeca has the wrong number of column. should be 2
Your problem is simple: Your Entity NFeProtocolo has a composite Id with two columns:
public class NFeProtocolo implements Serializable {
#Id
#Column(name = "nf_cabeca", length = 100, insertable = false, updatable = false)
private long nf_cabeca_id;
#Id
#Column(name = "protocolo", length = 100)
private String protocolo;
But your class NfCabeca is referencing it through only one column:
public class NfCabeca implements java.io.Serializable {
#ManyToOne
#JoinColumn(name = "protocolo")
private NFeProtocolo protocolo;
The solution:
A composite primary key is usually made up of two or more primitive or JDK object types.
As you have a composite key, you should use an Embeddable key, there are many examples about it like this, this and this.
I have an Entity FooBar which serves as the #ManyToMany join table for Foo and Bar entities including some additional information.
#Entity
#Table(name = "foo_bar")
public class FooBar
{
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "id", unique = true, nullable = false)
protected Long id;
#Column(name = "someInfo", nullable = true)
private String someInfo;
#ManyToOne(optional = false)
private Foo foo;
#ManyToOne(optional = false)
private Bar bar;
//getters, setters, and toString()
}
#Entity
#Table(name = "foo")
public class Foo
{
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "id", unique = true, nullable = false)
protected Long id;
#OneToMany(mappedBy = "foo", cascade = CascadeType.ALL, fetch = FetchType.EAGER)
private Set<FooBar> fooBars;
//Foo has a number of other fields
#Column(name = "orderIndex", nullable = false)
private int orderIndex;
#Column(name = "upgradeDirection", nullable = false)
#Enumerated(EnumType.STRING)
private Order direction;
#ManyToOne(optional = false)
private SomeEntity e;
//getters, setters, and toString()
}
#Entity
#Table(name = "bar")
public class Bar
{
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "id", unique = true, nullable = false)
protected Long id;
#OneToMany(mappedBy = "bar") //TODO specify a cascade and fetch attribute
private Set<FooBar> fooBars;
//Bar contains a number of other fields
#Column(name = "value", nullable = false)
private String value;
//getters, setters, and toString()
}
When Hibernate creates the table is has columns 'id', 'someInfo', 'foo_id', and 'bar_id'. 'foo_id' and 'bar_id' are used in as a composite key instead of using the 'id' field, any idea why?
Well i have this problem
These are my tables
this is my code for "Compra"
#Entity
#Table(name = "compra")
public class Compra implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "codigo", unique = true, nullable = false)
private int codigo;
#ManyToOne
#JoinColumn(name = "codProveedor", nullable = false)
private Proveedor proveedor;
#Column(name = "tipoComprobante", nullable = false)
private String tipoComprobante;
#Temporal(TemporalType.DATE)
#Column(name = "fechaFactura", nullable = false)
private Date fechaFactura;
#Temporal(TemporalType.DATE)
#Column(name = "fechaLlegada", nullable = false)
private Date fechaLlegada;
#Column(name = "serie", nullable = false)
private String serie;
#Column(name = "numero", nullable = false)
private int numero;
#Column(name = "importe", nullable = false)
private double importe;
#Column(name = "vigencia", nullable = false)
private boolean vigencia = true;
#ElementCollection
private List<DetalleCompra> lstDetalle = new ArrayList<DetalleCompra>();
// getters and setters ...
And this is my code for "DetalleCompra"
#Entity
#Table(name = "detalleCompra")
public class DetalleCompra implements Serializable {
#Id
#GeneratedValue(generator = "gen")
#GenericGenerator(name = "gen", strategy = "foreign", parameters = #Parameter(name = "property", value = "compra"))
#Column(name = "codCompra", nullable = false)
private int codCompra;
#ManyToOne
#JoinColumn(name = "codPresentacion", nullable = false)
private Presentacion presentacion;
#Column(name = "imei", nullable = false)
private String imei;
#Column(name = "simcard", nullable = false)
private String simcard;
getters and setters ...
Well everything looks fine, but when i want to save i have this problem
org.hibernate.TransientObjectException: object references an unsaved transient instance – save the transient instance before flushing: DetalleCompra
well it is clear because when i want to save Compra and DetalleCompra, the second table expect the fk value
public void registrar(Compra compra) {
try {
session = HibernateUtil.getSessionFactory().openSession();
trans = session.beginTransaction();
session.save(compra);
trans.commit();
} catch (Exception e) {
trans.rollback();
throw e;
} finally {
session.close();
}
}
Well the pk of table "compra" is generated well but for the other table does not recognized this value autogenerated, why?, how can i solve that?
#ElementCollection
Defines a collection of instances of a basic type or embeddable class.
Must be specified if the collection is to be mapped by means of a
collection table.
You use wrong annotation to represent relation. There is one to many relation between Compra and DetalleCompra.
You should change #ElementCollection annotation to #OneToMany. Do not forget to specify join columns #JoinColumn(name="codCompra"). I assume that Presentacion is properly mapped.
See also
Unidirectional Mapping vs. Bidirectional Mapping
mappedBy attribute
#OneToMany annotation
#ElementCollection annotation