Lombok excluding field with @ToString.Exclude is not working

Question

I'm using Lombok to remove boilerplate code. I'm attempting to print out an entity to the console but I'm getting a StackOverflowError. The entity has a bidirectional relationship with another entity, so I want to exclude this entity from the toString method.

My entity looks like this:

@Entity
@Data
public class Foo {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private long fooId;

    private String name;

    @ManyToOne
    @JoinColumn(name = "barId")
    @EqualsAndHashCode.Exclude
    @ToString.Exclude
    private Bar bar; 
}

This is my first time attempting to use @ToString.Exclude and it doesn't appear to be behaving. Am I using it incorrectly? I just want to print out fooId and name when I call toString on the Foo object.

Edit

I'm familiar with alternate approaches to excluding or including fields from a top level @ToString annotation. I'm attempting to avoid that. I just want to use @Data at the class level, and annotate the fields that should be excluded.

Edit 2

Still replicating on a simplified class. Lombok version 1.18.8.

Check this one. https://stackoverflow.com/questions/42649564/include-into-lombok-tostring-field-from-another-object — Sambit, May 22 '19 at 19:04
I don't think `@ToString.Exclude` works independent of `@ToString`. Going through the documentation to check. https://projectlombok.org/api/lombok/ToString.html — Subir Kumar Sao, May 22 '19 at 19:13
@SubirKumarSao thanks for the reply. Replacing `@Data` with `@ToString` does not resolve the issue. — The Gilbert Arenas Dagger, May 22 '19 at 19:16
The version (1.16) we are using works with @ToString(exclude="bar") — Jayr, May 22 '19 at 19:18
@TheGilbertArenasDagger `@Data` includes `@ToString` so you are good at that part. — Subir Kumar Sao, May 22 '19 at 19:19
@Jayr, that works for me as well. I recently learned about `@ToString.Exclude` and I would like to use that as an alternative. — The Gilbert Arenas Dagger, May 22 '19 at 19:19
@TheGilbertArenasDagger Strip the ORM annotations and check the imports are correct. Lets debug from there. Post the `toString()` output. — Subir Kumar Sao, May 22 '19 at 19:29
@TheGilbertArenasDagger, did you find a solution? Facing same problem. — Koushik Roy, Sep 22 '20 at 14:57
Is there any other way to exclude field from printing data in toString method withou Lombok or any other framework? — SylvesterTheKid, Mar 22 '23 at 10:46

score 29 · Answer 1 · answered May 22 '19 at 19:25

29

Works for me. lombok:1.18.8

import lombok.Data;
import lombok.ToString;

@Data
public class MyClass {
    public static void main(String args[]) {
        MyClass myClass = new MyClass();
        System.out.println("ToString::" + myClass);
    }

    private String a = "ABC";

    @ToString.Exclude
    private String b = "DEF";

}

Output: ToString::MyClass(a=ABC)

answered May 22 '19 at 19:25

Subir Kumar Sao

8,171
3
26
47

1

Thanks for posting and +1. I was on 1.18.6 but the issue still remains when I upgrade. I removed all the JPA annotations and the issue still remains. Hmmm.... – The Gilbert Arenas Dagger May 22 '19 at 19:37
Did you update both the eclipse Lombok plugin and the project dependency, and clean/rebuild the project? – Jan Rieke May 22 '19 at 21:22

ifelse.codes · Answer 2 · 2020-12-01T18:29:21.683

7

@ToString takes an argument exclude, that can be used to exclude fields from to string.

@ToString(exclude = {"bar"})

@Entity
@ToString(exclude = {"bar"})
public class Foo {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private long fooId;

    private String name;

    @ManyToOne
    @JoinColumn(name = "barId")
    @EqualsAndHashCode.Exclude
    private Bar bar; 
}

edited Dec 01 '20 at 18:29

answered Dec 01 '20 at 14:42

ifelse.codes

2,289
23
21

score 1 · Answer 3 · answered Jan 11 '20 at 16:30

1

You will have to update the lombok installed in your eclipse (download the new lombok.jar, run java -jar lombok.jar and restart Eclipse). At least that solved it for me.

answered Jan 11 '20 at 16:30

Robert Mikes

1,179
8
19

ALS · Answer 4 · 2020-09-23T09:09:58.093

lombok : 1.18.12

@Exclude works for me. @Exclude is nothing but @ToString.Exclude only. @Exclude annotation is defined inside @ToString annotation.

@Entity
@Data
public class Foo {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private long fooId;

    private String name;

    @ManyToOne
    @JoinColumn(name = "barId")
    @EqualsAndHashCode.Exclude
    @Exclude
    private Bar bar; 
}

score 0 · Answer 5 · answered Jul 27 '20 at 03:28

0

In Kotlin

You could avoid using the Lombok library and define a custom annotation @ExcludeToString to exclude the redundant parameter or what you need.

GL

answered Jul 27 '20 at 03:28

Braian Coronel

22,105
4
57
62

Lombok excluding field with @ToString.Exclude is not working

5 Answers5

In Kotlin

Linked