使用@ManyToOne 映射实体的重复列

Question

I have two entities which is giving me error on creation of datasource

Entity1

@NoArgsConstructor
@Entity
@Table(name = "person_details")
public class PersonDetails {
    @Id
    private String pid;

    @Column(name = "first_name")
    private String firstName;

    @Column(name = "last_name")
    private String lastName;

    @Column(name = "exist_flag")
    private String existFlag;

    @OneToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
    @JoinColumn(name = "pid", nullable = false)
    private List<AddressDetails> addressDetails;
}

Entity 2 | EDIT 1

@Data
@NoArgsConstructor
@Entity
@Table(name = "address_details")
public class AddressDetails {

    private String street;

    @Column(name = "address_exist_flag")
    private String addressExistFlag;

    @ToString.Exclude
    @EqualsAndHashCode.Exclude
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "pid", insertable = false, updatable = false)
    private PersonDetails personDetails;

}

Getting error as below:

I am getting error as "No identifier specified for entity: AddressDetails".

How to resolve in such case? Can we use spring data jpa having OneToMany mapping in such case where one entity do not have primary key ?

Answer 1

The error you are getting is because you are using the same column name for 2 different columns.

@Id
private String pid;

and

@JoinColumn(name = "pid"

means that you want both your id column and your foreign key column to be named "pid", hence the error. I would suggest using a name like "addressDetailsFk" for the JoinColumn attribute.