JaVers exception when @Id is on Getter instead of on property

Question

I have an Entity which for a number of reasons ( Why should anybody put annotations on the getters or setters when using JPA to map the classes? ) we are annotating the getter method instead of the field:

protected Long id;
...

@Id
@GeneratedValue(...)
@SequenceGenerator(...)
@Column(name = "id")
public Long getId()
{
    return id;
}

public void setId(Long id)
{
    this.id = id;
}

When calling:

javers.findChanges(QueryBuilder.byInstanceId(5, MyModel.class).build())

JaVers is throwing the following exception:

JaversException: ENTITY_WITHOUT_ID Class 'com.myproject.model.MyModel' mapped as Entity has no Id property. Use @Id annotation to mark unique and not-null Entity identifier.

Is it supported?

Answer 1

JaVers do supports mapping on getters & setters, it's called BEAN mapping style, see: http://javers.org/documentation/domain-configuration/#property-mapping-style .

By default, FIELD mapping is used but you can switch to BEAN as follows:

Javers javers = JaversBuilder
               .javers()
               .withMappingStyle(MappingStyle.BEAN)
               .build();

Answer 2

我已经将javers.mappingStyle=BEAN设置为 application.properties 并且它有效。

Answer 3

I stand corrected. JaVers supports both Bean and field Mapping style as per documentation http://javers.org/documentation/domain-configuration/#property-mapping-style . Still, when using the BEAN mapping as suggested, it is still not working. Maybe it is conflicting with other annotations? Here is my code and where Ive placed the JaVers @Id

I changed the MappingStyle to BEAN style and still it doesnt work. Here is the JaVers @Id on my getter field:

@Id
@GeneratedValue(generator = "...")
@SequenceGenerator(...
@Column(name = "id")
@org.javers.core.metamodel.annotation.Id
public Long getId()
{
    return id;
}