Wrong marshalling from ControllerAdvice

[fdw]

I'm using an exception handler annotated with @ControllerAdvice in a Spring-MVC application. For some errors, I want to return a useful response containing HAL-links.

Unfortunately, those links are not rendered correctly in JSON as "_links", but rather as "links". It seems that when using @ControllerAdvice, the SerializerMixins are not configured for Jackson: Through debugging, I noticed that DefaultSerializerProvider._config.mixInAnnotations is empty here, but contains, among others, "org.springframework.hateoas.hal.ResourceSupportMixin" when marshalling from an ordinary @RestController. The content-type is correctly set to "application/hal+json".

Did I miss something? Is there a way to render correct links?

[fdw]

Any news on this?

[schvanhugten]

You could use the following work-around?

• Create another resource with a List and annotate it with @JsonSerialize. If it works for you can use @JsonSerialize(using = Jackson2HalModule.HalLinkListSerializer.class) else use the work-around from Jackson2HalModule.HalLinkListSerializer needs default constructor #196. This will make sure that your links are rendered (somewhat, see Allow links on a particular rel to be displayed as an array even if there is only one link #288) correctly.
• Return the new object as ResponseEntity.

[odrotbohm]

What do you actually return from your controller advice methods?

[fdw]

I return a custom object (let's call it ErrorResource) that inherits from ResourceSupport, just like I do in other controllers. If I return such an ErrorResource from a regular controller, the links are rendered correctly, so this seems to work.

[hantsy]

I encountered the same problem here when I added @JsonSerialize(using = Jackson2HalModule.HalResourcesSerializer .class) and got exception Class org.springframework.hateoas.hal.Jackson2HalModule$HalResourcesSerializer has no default (no arg) constructor. I will try other solutions for this.

I posted my question here.

http://stackoverflow.com/questions/33957999/custom-error-is-not-rendered-as-hal-in-spring-boot-1-3-and-spring-hateoas-0-19

[fdw]

Hi, it seems that nothing has changed since the original report. Are there any plans for a fix?