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I am going to delete the object by id but i am getting error like:

com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Cannot delete or update a parent row: a foreign key constraint fails (mydatabase.assignmentaudit, CONSTRAINT FKqgsllo6dm5kdx7ptc3qu5mefd FOREIGN KEY (auditor_group_id) REFERENCES auditor_group (auditor_group_id))

The method i made to delete by id is :

@DeleteMapping("/assignment-audit/id")
 public ResponseEntity<String> deleteAssignmentAudit(@PathVariable("id") long id) 
 System.out.println("Delete AssignmentAudit with ID = " + id + "...");

 assignmentAuditRepository.deleteById(id);

 return new ResponseEntity<>("Assignment Audit has been deleted!", HttpStatus.OK);
 

The mapping of my tables looks like:

Selection.java

@Entity
@Table(name="selection")
public class Selection implements Serializable 


 private static final long serialVersionUID = 1L;

 @Id
 @GeneratedValue(strategy = GenerationType.AUTO)
 private Long selectionId;

 @Column(name="selection_date")
 private String selectionDate;

 @Column(name="selected_by")
 private String selectedBy;

 @Column(name="pan_exim_number")
 private Long panEximNumber;

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

 @Column(name="address")
 private String address;

 @Column(name="phone_number")
 private String phoneNumber;

 @Column(name="selection_type")
 private String selectionType;

 @Column(name="consignment_no")
 private String consignentNo;

 @Column(name="consignment_date")
 private String consignentDate;


 @Column(name="selection_period_from_date")
 private String selectionPeriodFromDate;

 @Column(name="selection_period_to_date")
 private String selectionPeriodToDate;

 @Column(name="agent_no")
 private Long agentNo;

 @Column(name="custom_office")
 private String customOffice;


 @OneToMany(mappedBy="selection")
 private List<AssignmentAudit> assignmentAudit;
//i omitted getters and setters as i have in my program

AssignmentAudit.java

@Entity
@Table(name = "assignmentaudit")
public class AssignmentAudit implements Serializable 


 private static final long serialVersionUID = 1L;

 @Id
 @GeneratedValue(strategy = GenerationType.AUTO)
 private long id;

 @ManyToOne(fetch = FetchType.EAGER, optional = false,cascade=CascadeType.ALL)
 @JoinColumn(name = "auditorGroupId")
 private AuditorGroup auditorGroup;

 @Column(name = "assignmentDate")
 private String assignmentDate;

 @ManyToOne(fetch = FetchType.EAGER, optional = false,cascade=CascadeType.ALL)
 @JoinColumn(name = "selectionId")
 @JsonIgnore
 private Selection selection;

AuditorGroup.java

@Entity
@Table(name = "auditor_group")
public class AuditorGroup implements Serializable 

 /**
 * 
 */
 private static final long serialVersionUID = 1L;

 @Id
 @GeneratedValue(strategy = GenerationType.AUTO)
 private long auditorGroupId;

 @Column(name="group_desc")
 private String groupDesc;

 @Column(name="from_date")
 private String fromDate;

 @Column(name="to_date")
 private String toDate;

AssignmentAuditRepository.java

public interface AssignmentAuditRepository extends JpaRepository<AssignmentAudit, Long> 

I only need to delete assignmentAudit by its id such that selection and auditGroup remains unchanged and unaffected when assignmentAudit is deleted.

You have to remove the cascade=CascadeType.ALL from the @ManyToOne mappings.

Alternatively change it, so that the CascadeType.DELETE is not included.