How to resolve IdClass Property not found issue when creating composite primary key using JPA

Question

I am having issues creating composite primary key

I am getting org.hibernate.AnnotationException: Property of @IdClass not found this exception.

My serializable implementing class and model class is given below:

public class MakeCompositeKey implements Serializable {
    private String codeName;
    private int year;

    public MakeCompositeKey() {
    }

    public MakeCompositeKey(String codeName, int year) {
        this.codeName = codeName;
        this.year = year;
    }

    @Override
    public int hashCode() {
        return super.hashCode();
    }

    @Override
    public boolean equals(Object obj) {
        return super.equals(obj);
    }
}

and

@Entity

@IdClass(MakeCompositeKey.class)
    
public class Averages {

    @Id
    @Column(name = "code_name")
    private  String CodeName;
    @Id
    private  int year;


    @Column(name = "weighted_average_shs_out")
    private double Weighted_Average_Shs_Out;

    @Column(name = "weighted_average_shs_dil")
    private double Weighted_Average_Shs_Out_Dil;

    @Column(name = "average_receivables")
    private double Average_Receivables;

    @Column(name = "average_payables")
    private double Average_Payables;

    @Column(name = "average_inventory")
    private double Average_Inventory;
    
    //getters and setters 
}

I don't understand what's going wrong. Please, help me resolve this issue.

Thank you!

score 1 · Accepted Answer · edited Jul 19 '21 at 07:25

1

You have a typo here which probably breaks everything up.

public class Averages {
  @Id
  @Column(name = "code_name")
  private String CodeName;  // <----this should be codeName instead of CodeName
  
  //...class implementation
}

edited Jul 19 '21 at 07:25

Manuel Pap

1,309
7
23
52

answered Jul 18 '21 at 17:53

Panagiotis Bougioukos

15,955
2
30
47

@ArafatHossain you can always accept the answer and upvote if it helped you solve the problem ;) – Panagiotis Bougioukos Jul 18 '21 at 20:15
ya sure but unfortunately i am not eligible to upvote -_- – Arafat Hossain Jul 27 '21 at 15:37
@ArafatHossain you can always accept the answer – Panagiotis Bougioukos Jul 27 '21 at 15:41

score 0 · Answer 2 · answered Jul 18 '21 at 17:50

0

MakeCompositeKey should be annotated with @Embeddable

Look at this: How to map a composite key with JPA and Hibernate?

answered Jul 18 '21 at 17:50

bichoFlyer

178
9

How to resolve IdClass Property not found issue when creating composite primary key using JPA

2 Answers2