OneToMany关系不存储实体字段

Question

保存“我的实体”时，通过@OneTomany关系工作的子实体不会保存到它们的表中。我不明白怎么回事。

员工：

@Entity
@Table(name = "EMPLOYEE", schema = PUBLIC)
public class Employee {

private String name;

private String lastname;

@OneToMany(mappedBy = "employee", cascade = CascadeType.ALL, orphanRemoval = true)
List<EmployeePhoneNumber> employeePhoneNumbers = new ArrayList<>();

}

EmployeePhoneNumber：

@Entity
@Table(name = "EMPLOYEE_PHONES", schema = PUBLIC)
public class EmployeePhoneNumber {

    @Id
    @SequenceGenerator(allocationSize = 1, name = "SEQ_EMPLOYEE_PHONES", schema = PUBLIC,
            sequenceName = "EMPLOYEE_PHONES_ID_SEQ")
    @GeneratedValue(generator = "SEQ_EMPLOYEE_PHONES", strategy = GenerationType.SEQUENCE)
    @Column(name = "ID", unique = true, nullable = false)
    private Long id;

    @ManyToOne
    @JoinColumn(name = "employee_id", referencedColumnName = "id",
            nullable = false, insertable = false, updatable = false)
    private Employee employee;

    @Column(name = "PHONE_NUMBER", unique = true, nullable = false)
    private String phoneNumber;

    @Enumerated(EnumType.STRING)
    @Column(name = "NUMBER_TYPE", nullable = false)
    private PhoneNumberType phoneNumberType;
}

如何设置这些字段，然后保存实体：

        EmployeePhoneNumber workPhone = new EmployeePhoneNumber();
        workPhone.setPhoneNumber(workPhone);
        workPhone.setPhoneNumberType(PhoneNumberType.WORK_PHONE);

        EmployeePhoneNumber mobilePhone = new EmployeePhoneNumber();
        mobilePhone.setPhoneNumber(mobilePhone);
        mobilePhone.setPhoneNumberType(PhoneNumberType.MOBILE_PHONE);

        EmployeePhoneNumber corporatePhone = new EmployeePhoneNumber();
        corporatePhone.setPhoneNumber(corporatePhoneNumber);
        corporatePhone.setPhoneNumberType(PhoneNumberType.CORPORATE_PHONE);

        List<EmployeePhoneNumber> employeePhoneNumbers = employee.getEmployeePhoneNumbers();
        employeePhoneNumbers.add(workPhone);
        employeePhoneNumbers.add(mobilePhone);
        employeePhoneNumbers.add(corporatePhone);

        employee.setEmployeePhoneNumbers(employeePhoneNumbers);

        employeeRepository.save(employee);

在完成该方法后，我没有一个错误，所有的工作都是正确的，只是表格没有填满--为什么？

Answer 1

您还必须在EmployeePhoneNumber中设置Employee引用，因为Hibernate将使用它来保存它。

workPhone.setEmployee(employee);
mobilePhone.setEmployee(employee);
corporatePhone.setEmployee(employee);

最好的解决方案是在EmployeephoneNumber上创建一个addEmployeePhoneNumber方法,如下所示：

 public void addEmployeePhoneNumber(EmployeePhoneNumber phoneNumber) {
     phoneNumber.setEmployee(this);
     employeePhoneNumbers.add(phoneNumber);
 }

这样你就不会忘记设定双方的关系。