我正在使用 hibernate 4.3，oracle 11：
当我想插入一个员工时（它与类别有一对多的关系（一个类别有很多员工）），首先我将一个类别插入数据库，然后我尝试将一个员工插入数据库并得到一个异常，实体的代码是由hibernate生成的，所以我不知道出了什么问题，问题似乎是当我插入员工时 Hibernate 没有插入 ID_CAT，我做错了什么？我也尝试从休眠生成表，但给了我同样的错误，感谢您的关注，我希望您能帮助我！
（类别和员工都与实体“企业”相关，但这部分效果很好）
例外：
abr 27, 2016 11:11:58 AM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
WARN: SQL Error: 1400, SQLState: 23000
abr 27, 2016 11:11:58 AM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
ERROR: ORA-01400: no se puede realizar una inserción NULL en ("WSPUSER"."TM_EMPLEADOS"."ID_CAT")
abr 27, 2016 11:11:58 AM org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl release
INFO: HHH000010: On release of batch it still contained JDBC statements
Error org.hibernate.exception.ConstraintViolationException: could not execute statement
Exception in thread "main" org.hibernate.TransactionException: Transaction not successfully started
at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:172)
at tws.hibernate.dao.GenericDAO.endTransaction(GenericDAO.java:59)
at tws.hibernate.dao.GenericDAO.insert(GenericDAO.java:88)
at TwsTestRunner.insertarEmpleado(TwsTestRunner.java:289)
at TwsTestRunner.main(TwsTestRunner.java:27)
实体“员工”：
@Entity
@Table(name = "TM_EMPLEADOS")
public class TmEmpleados implements java.io.Serializable {
private TmEmpleadosId id;
private TmEmpresas tmEmpresas;
private TmCategoria tmCategoria;
private String nombre;
public TmEmpleados() {
}
public TmEmpleados(TmEmpleadosId id,TmEmpresas tmEmpresas, TmCategoria tmCategoria,String nombre) {
this.id = id;
this.tmEmpresas = tmEmpresas;
this.tmCategoria = tmCategoria;
this.nombre = nombre;
}
@EmbeddedId
@AttributeOverrides({
@AttributeOverride(name = "idEmple", column = @Column(name = "ID_EMPLE", nullable = false, length = 25)),
@AttributeOverride(name = "mand", column = @Column(name = "MAND", nullable = false, length = 3)),
@AttributeOverride(name = "idEmp", column = @Column(name = "ID_EMP", nullable = false, length = 6)) })
public TmEmpleadosId getId() {
return this.id;
}
public void setId(TmEmpleadosId id) {
this.id = id;
}
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumns({
@JoinColumn(name = "ID_CAT", referencedColumnName = "ID_CAT", nullable = false, insertable = false, updatable = false),
@JoinColumn(name = "ID_EMP", referencedColumnName = "ID_EMP", nullable = false, insertable = false, updatable = false),
@JoinColumn(name = "MAND", referencedColumnName = "MAND", nullable = false, insertable = false, updatable = false) })
public TmCategoria getTmCategoria() {
return this.tmCategoria;
}
public void setTmCategoria(TmCategoria tmCategoria) {
this.tmCategoria = tmCategoria;
}
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumns({
@JoinColumn(name = "ID_EMP", referencedColumnName = "ID_EMP", nullable = false, insertable = false, updatable = false),
@JoinColumn(name = "MAND", referencedColumnName = "MAND", nullable = false, insertable = false, updatable = false) })
public TmEmpresas getTmEmpresas() {
return this.tmEmpresas;
}
@Column(name = "NOMBRE", nullable = false, length = 50)
public String getNombre() {
return this.nombre;
}
public void setNombre(String nombre) {
this.nombre = nombre;
}
}
实体“类别”：
@Entity
@Table(name = "TM_CATEGORIA")
public class TmCategoria implements java.io.Serializable {
private TmCategoriaId id;
private String descripcion;
private Set<TmEmpleados> tmEmpleadoses = new HashSet<TmEmpleados>(0);
public TmCategoria() {
}
public TmCategoria(TmCategoriaId id, String descripcion) {
this.id = id;
this.descripcion = descripcion;
}
public TmCategoria(TmCategoriaId id, String descripcion,Set<TmEmpleados> tmEmpleadoses) {
this.id = id;
this.descripcion = descripcion;
this.tmEmpleadoses = tmEmpleadoses;
}
@EmbeddedId
@AttributeOverrides({
@AttributeOverride(name = "idCat", column = @Column(name = "ID_CAT", nullable = false, length = 3)),
@AttributeOverride(name = "idEmp", column = @Column(name = "ID_EMP", nullable = false, length = 6)),
@AttributeOverride(name = "mand", column = @Column(name = "MAND", nullable = false, length = 3)) })
public TmCategoriaId getId() {
return this.id;
}
public void setId(TmCategoriaId id) {
this.id = id;
}
@Column(name = "DESCRIPCION", nullable = false, length = 50)
public String getDescripcion() {
return this.descripcion;
}
public void setDescripcion(String descripcion) {
this.descripcion = descripcion;
}
@OneToMany(fetch = FetchType.LAZY, targetEntity = TmEmpleados.class, mappedBy = "tmCategoria")
public Set<TmEmpleados> getTmEmpleadoses() {
return this.tmEmpleadoses;
}
public void setTmEmpleadoses(Set<TmEmpleados> tmEmpleadoses) {
this.tmEmpleadoses = tmEmpleadoses;
}
}
我编辑了 hibernate 配置以显示 sql，控制台显示了以下内容：
abr 28, 2016 10:55:39 AM org.hibernate.validator.internal.util.Version <clinit>
INFO: HV000001: Hibernate Validator 5.1.3.Final
Hibernate: select tmcategori_.ID_CAT, tmcategori_.ID_EMP, tmcategori_.MAND, tmcategori_.DESCRIPCION as DESCRIPCION4_6_ from WSPUSER.TM_CATEGORIA tmcategori_ where tmcategori_.ID_CAT=? and tmcategori_.ID_EMP=? and tmcategori_.MAND=?
Hibernate: select tmempresas_.ID_EMP, tmempresas_.MAND, tmempresas_.DESCRIPCION as DESCRIPCION5_25_ from WSPUSER.TM_EMPRESAS tmempresas_ where tmempresas_.ID_EMP=? and tmempresas_.MAND=?
Hibernate: insert into WSPUSER.TM_EMPLEADOS ( NOMBRE, ID_EMP, ID_EMPLE, MAND) values (?, ?, ?, ?)
abr 28, 2016 10:55:40 AM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
WARN: SQL Error: 1400, SQLState: 23000
abr 28, 2016 10:55:40 AM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
ERROR: ORA-01400: no se puede realizar una inserción NULL en ("WSPUSER"."TM_EMPLEADOS"."ID_CAT")
abr 28, 2016 10:55:40 AM org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl release
INFO: HHH000010: On release of batch it still contained JDBC statements
Exception in thread "main" org.hibernate.TransactionException: Transaction not successfully started
at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:172)
at tws.hibernate.dao.GenericDAO.endTransaction(GenericDAO.java:59)
at tws.hibernate.dao.GenericDAO.insert(GenericDAO.java:88)
