CODEWITHSUNDEEP
javaspringpostgresqlspring-bootjpa
soumya sambit Kunda
soumya sambit Kunda

Reputation: 508

JPA update record is failing due to @OneToMany

I have a very small doubt regarding @OneToMany mapping.

I have a model student and another model attendance.

A student can have multiple attendance. but student model should only be able to retrieve the attendance info.

But when I am trying to change some student info I am getting below error as it is trying to update attendance record.

here is my mapping

@Entity
@Table(name="student_detail")
@Getter @Setter
public class StudentDetailsModel {

    @Id
    @Column(name="reg_no",updatable = false, nullable = false)
    private String regNo;

    @OneToMany(fetch = FetchType.LAZY, cascade = { CascadeType.ALL })
    @JoinColumn(name = "reg_no")
    private List<AttendanceModel> attendances;
}

and the exception I a getting.

    update
        student_detail 
    set
        address=?,
        alt_contact_number=?,
        blood_group=?,
        contact_number=?,
        dob=?,
        father_name=?,
        first_name=?,
        gender=?,
        last_name=?,
        middle_name=?,
        mother_name=?,
        photo_url=?,
        school_id=? 
    where
        reg_no=?
Hibernate: 
    update
        attendance 
    set
        reg_no=null 
    where
        reg_no=?
2019-01-13 12:12:52.922  WARN 10708 --- [nio-8081-exec-1] o.h.engine.jdbc.spi.SqlExceptionHelper   : SQL Error: 0, SQLState: 23502
2019-01-13 12:12:52.923 ERROR 10708 --- [nio-8081-exec-1] o.h.engine.jdbc.spi.SqlExceptionHelper   : ERROR: null value in column "reg_no" violates not-null constraint
  Detail: Failing row contains (null, 1, 2019-01-05, t, 2).
2019-01-13 12:12:52.926  INFO 10708 --- [nio-8081-exec-1] o.h.e.j.b.internal.AbstractBatchImpl     : HHH000010: On release of batch it still contained JDBC statements
org.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; constraint [reg_no]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement

my attenance model is as follows 

@Entity
@Table(name="attendance")
@Getter @Setter
public class AttendanceModel {

    //@EmbeddedId
    //private AttendanceId attendanceId;

    @Id
    @Column(name="attendance_id")
    private long id;


    @Column(name="reg_no")
    private String regNo;

    @Column(name="subject_id")
    private long subjectId;

    @Column(name="class_date")
    private Date classDate;


    @Column(name="present")
    private boolean present;
}

Upvotes: 0

Views: 461

Answers (1)

squalltrt
squalltrt

Reputation: 21

Could you show me Student Model.If i look your code post : You using Unidirectional relationship.

I think it must : 

@OneToMany(fetch = FetchType.LAZY , cascade = CascedeType.ALL)
@JoinColumn(name="attendance_id")
private List<AttendanceModel> attendances = new ArrayList<>();

Upvotes: 1

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