I can't figure out how to do a post request for this. Spring Data JPA- Foreign Keys- Composite Keys

[Nathan Milota]

I have a Student class

@Data
@AllArgsConstructor
@NoArgsConstructor
@Entity
@Table(name="students")
@IdClass(StudentIdentity.class)
public class Student {
	
	
	@EmbeddedId
	private StudentIdentity studentIdentity;
	
	
	@Id 
	
	private String studentId;
	@Id
	private School school;

	
	@Column(name= "first_name")
	private String firstName;
	@Column(name="last_name")
	private String lastName;
	
	private String status;
	
	@Column(name="is_restricted")
	private boolean isRestricted;
	
	@Column(name="restricted_reason")
	private String restrictedReason;
	
	@Column(name="ticket_number")
	private String ticketNumber;

}

A StudentIdentity class.  

@Data
@AllArgsConstructor
@NoArgsConstructor
@EqualsAndHashCode



@Embeddable
public class StudentIdentity implements Serializable{
	
	
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;






	public StudentIdentity() {
		
	}
	
	@Column(name="student_id", insertable=false, updatable=false)
	private String studentId;
	
	@JsonIgnore
	@OneToOne(fetch= FetchType.EAGER)
	@JoinColumn(name="school_id", referencedColumnName="id", insertable=false, updatable=false)
	
	private School school;
	
	
	
	
	
	
	public School getSchool() {
		return school;
	}
	public void setSchool(School school) {
		this.school = school;
	}
	public String getStudentId() {
		return studentId;
	}
	public void setStudentId(String studentId) {
		this.studentId = studentId;
	}

	
	}

And the post method in the controller class.  

@PostMapping("/addStudent")
	public Student addStudent(@RequestBody Student student) {
		return service.saveStudent(student);
	}

I've tried it several different ways in Postman and I get a 400 Bad Request error.  


Does anyone have an idea how you would do this given the class has foreign and composite keys?  

[Himai Minh]

I think you can first try to remove the school attribute in your studentIdentity id.
Your student identity can include some unique attributes related to the students, such as id number.
But the school is a relationship to the student.