Use Entity ResourceProcessor when Serializing Projection [DATAREST-713]

Mathias D opened DATAREST-713 and commented

I am using spring-data-rest 2.4.1 to expose a entity as a rest resource.

I also implemented a ResourceProcessor to add a custom link to the resource

@Component
public class MyEntityResourceProcessor implements ResourceProcessor<Resource<MyEntity>> {
    @Override
    public Resource<MyEntity> process(Resource<MyEntity> resource) {
        resource.add(linkTo(methodOn(CustomController.class).getFeatures(resource.getContent().getId())).withRel("customRel"));
        return resource;
    }
}

This works fine for the single item resource. But I also have setup a ExcerptProjection that reduces the attributes shown in the collection resource:

@Projection(name = "myExcerptProjection", types = MyEntity.class)
interface MyExcerptProjection {
    String getName();
    String getSlogan();
}

When the projection is used my MyEntityResourceProcessor is not invoked and the custom link is missing.

I can bring in the link by implementing a ResourceProcessor for the projection like so:

public class MyEntityProjectionResourceProcessor implements ResourceProcessor<Resource<MyExcerptProjection>>

But I would like to avoid this because:

• it is code duplication
• and i am missing the entity id in the projection so I cannot generate the link

By default I would expect spring data rest to use the ResourceProcessor of the Entity the Projection belongs to

Affects: 2.4.1 (Gosling SR1)

Reference URL: http://stackoverflow.com/questions/33501648/excerpt-projection-and-custom-links-from-resourceprocessor

1 votes, 4 watchers