JPA单向@OneToOne，应在另一个表中创建列

Question

I have Employee and Department requirement, where I want a field department in the employee entity, but I want department to hold foreign key, rather than employee holding the DEPT_ID. The later can be easily achieved using @JoinColumn. Mapped by is not an option, as it is unidirectional.

Do you know if there is any way to do so?

Answer 1

It is exactly the JoinColumn you should use and set the attributes of the annotation the correct way.

class Department {

  @OneToOne
  @JoinColumn(name="ID",referencedColumnName = "here comes the foreign key departmentID ")
  Employee employee;
}