Lombok @Builder and JPA Default constructor

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I'm using project Lombok together with Spring Data JPA. Is there any way to connect Lombok @Builder with JPA default constructor?

Code:

@Entity 
@Builder
class Person {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
}

As far as I know JPA needs default constructor which is overriden by @Builder annotation. Is there any workaround for that?

This code gives me error: org.hibernate.InstantiationException: No default constructor for entity: : app.domain.model.Person

Lombok Builder with Default Value, With Lombok, we can have all this with some simple annotations: ? @Getter. @​Builder. @NoArgsConstructor. @Builder was introduced as experimental feature in lombok v0.12.0. @Builder gained @Singular support and was promoted to the main lombok package since lombok v1.16.0. @Builder with @Singular adds a clear method since lombok v1.16.8. @Builder.Default functionality was added in lombok v1.16.16. @Builder (builderMethodName = "") is legal (and will

You can also solve it explicit with @Data @Builder @NoArgsConstructor @AllArgsConstructor combined on the class definition.

Builder, @Builder.Default functionality was added in lombok v1.16.16. @Builder can be placed on a class, or on a constructor, or on a method. While the "on a class"  With this, the default values will be present with the builder, making the first test case pass. Unfortunately, the no-args constructor won't get the default values, making the second test case fail. Even if the no-args constructor isn't generated but explicitly written. This side effect of the Builder.Default annotation is present from the

It seems that the annotations order is important here, using the same annotations, but different orders, you can have the code working, or not.

Here is a non working example:

@AllArgsConstructor
@Builder
@Data
@Entity
@EqualsAndHashCode
@NoArgsConstructor
@RequiredArgsConstructor
@Table
@ToString
public class Person implements Serializable {
  private String name;
}

And this is a working example:

@Builder
@Data
@Entity
@EqualsAndHashCode
@AllArgsConstructor
@NoArgsConstructor
@RequiredArgsConstructor
@Table
@ToString
public class Person implements Serializable {
  private String name;
}

So be sure to have the @Builder annotation at the very top position, in my case I encountered this error because I wanted to sort annotations alphabetically.

Lombok @Builder and JPA Default constructor, I'm using project Lombok together with Spring Data JPA. Is there any way to connect Lombok @Builder with JPA default constructor? Code: @Entity @Builder​  Note that we have tested getter methods, setter methods, default constructor and parameterized constructor in the above example. Output We can declare getter and setter methods on only for some properties by using @Getter , @Setter annotation for those properties.

If the annotations lombok.Tolerate on constructor and javax.validation.constraints.NotNull on some property are used at the same time, sonarqube will mark it as a critical error: PROPERTY is marked "javax.validation.constraints.NotNull" but is not initialized in this constructor.

If the project uses SpringData with JPA, it can be solved using org.springframework.data.annotation.PersistenceConstructor (Spring annotation, not JPA!)

Then, in combination with Lombok, annotations will be like this:

@RequiredArgsConstructor(onConstructor = @__(@PersistenceConstructor))

For Lombok builder you also need to add:

@Builder
@AllArgsConstructor

Lombok @Builder and JPA Default constructor, I'm using project Lombok together with Spring Data JPA. Is there any way to connect Lombok @Builder with JPA default constructor? Code: The builder also has a build() method which returns a completed instance of the original type, created by passing all parameters as set via the various other methods in the builder to the constructor or method that was annotated with @Builder. The return type of this method will be the same as the relevant class, unless a method has been

Using @NoArgsConstructor and @AllArgsContructor will help solve the issue of having a default constructor with @Builder.

e.g

@Entity 
@Builder
@NoArgsConstructor
@AllArgsContructor
class Person {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
}

This is because @Builder requires all argument constructor and specifying only a default constructor will cause an issue.

Here is nore explaination: https://github.com/rzwitserloot/lombok/issues/1389#issuecomment-369404719

combining @Data and @Builder remove the default constructor , I'm using project Lombok together with Spring Data JPA. Is there any way to connect Lombok @Builder with JPA default constructor? @Builder. Est-il possible de se connecter Lombok @Builder avec JPA default constructor? Code: @Entity @Builder class Person { @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; } autant que je sache, JPA a besoin du constructeur par défaut qui est remplacé par @Builder annotation. Est-il une solution de contournement pour qui? ce code

Lombok @Builder et JPA Default constructor, combining @Data and @Builder remove the default constructor #816. Open. lombokissues opened this issue on Jul 14, 2015 · 14 comments. Open  As the @Builder can't work without the constructor, this should probably be strengthened: It should always generate the needed constructor, unless a "colliding" constructor already exists (defined explicitly or using a Lombok annotation).

Using Lombok's @Builder annotation with default values, j'utilise le projet Lombok avec Spring Data JPA. Est-il possible de se connecter Lombok @Builder avec JPA default constructor? Code: @Entity @Builder class  If true, lombok will generate a private no-args constructor for any @Value or @Data annotated class, which sets all fields to default values (null / 0 / false). Small print Even if a field is explicitly initialized with null , lombok will consider the requirement to avoid null as fulfilled, and will NOT consider the field as a 'required' argument.

Using Lombok's @Builder annotation with default values. When writing Java, I'm a big fan of Lombok, a library that helps reduce boilerplate  PS: @AllArgsConstructor(onConstructor=@__(@Builder)) does not work because @Builder is an annotation-processing annotation that lombok translates to code during compilation. Generating and then translating new lombok annotation would require several iterations of annotation processing, and lombok does not support that.

Comments
  • Try adding a @NoArgsConstructor projectlombok.org/api/lombok/NoArgsConstructor.html
  • try adding a no args constructor .AFAIK, @Builder will not override your no args constructor
  • Yeah but @Id is a required field. NoArgs doesnt gonna cut it
  • I don't understand what you want. How can you have a noargs constructor that makes up values? @Id is either required or not. If it is, you need a constructor parameter, if not, you can use NoArgs. What am I missing here?
  • I had the same question as krzakov and I solved it with your hint, using @Tolerate. Thanks for that Jeff. But is there any reason why you add the @Data annotation? Setters are not necessary in this case and @Data overwrites equal/hash/toString with the default behaviour, which can create problems.
  • Do not use @Data with entities.
  • If this is concern is related to toString, equals and hashCode, I have added links to documents regarding proper implementation.
  • @wst , why would @Data be bad idea with entities?
  • @srnjak @Data by default uses all fields for generating equals and hashCode methods, including id. Simple example - you may have the same entity representation before and after save which, from Java perspective, will be different instances (with and without an id.) This may lead to confusion and consistency issues. You may use @Data if you're overriding those methods. There is chapter of Hibernate docs about it: docs.jboss.org/hibernate/orm/5.3/userguide/html_single/…
  • Note, this does not automatically create accessor methods (getters).
  • @Jeff then just add @Data
  • You don't want to use @Data as this generates equals, hashCode and toString methods, which in the case of jpa entities should be hand generated. See the details in my answer above.