java - Spring data jpa @Onetomany问题

Question

@Entity
class Hospital{

@Id     
@GeneratedValue 
Private long hospitalId

Private String name;

Private string password;

@Embaded
Private Address address;

@Onetomany(mappedby=Hospital)
Private List<Department> department;

}

@Entity
class Department {

@Id     
@GeneratedValue 

private Long depId;

Private String department;

@Manytoone

@JoinColumn(name="hospitalId")

Private Hospital hospital

}

这里的情况就像第一家医院在登录后注册名称、密码、地址，只有医院才会输入部门详细信息。 我想在医院获取注册并从特定医院获取部门详细信息时仅插入外键到部门实体我想使用外键更新部门实体如何使用 spring data jpa 实现它

Answer 1

我认为这就是您正在寻找的。

@Entity
@Table(name = "Hospital")
class Hospital{

    @Id
    @GeneratedValue
    Private long hospitalId

    Private String name;

    Private string password;

    @Embedded
    Private Address address;

    @OneToMany(mappedBy = "hospital", fetch = FetchType.LAZY)
    @JsonIgnore
    Private List<Department> department;

}

@Entity
@Table(name = "Department")
class Department {

    @Id
    @GeneratedValue
    private Long depId;

    Private String department;


    @JoinColumn(name = "hospitalId")
    @ManyToOne()
    @OnDelete(action = OnDeleteAction.CASCADE)
    Private Hospital hospital;

}