On Thursday, October 3, 2013 9:50:17 PM UTC+2, Manu Botija wrote:
>
> Hi,
>
> Please let me know if this is not the place for this kind of questions...
>
> I am using *Objectify* with *RequestFactory*. I have an objectify
> *Entity*called
> *Entry* with an attribute of type Ref*<?>*. Following
> *Objectify*recommendations, I declare the getter and setter for that kind of
> argument
> as:
>
> * @Parent Ref<Topic> topic;*
>
> *public Topic getTopic() {*
>
> * return topic.get();*
>
> * }*
>
> **
>
> *public void setTopic(Topic topic) {*
>
> *this.topic = Ref.create(topic);*
>
> *}*
>
> *(Topic is an Entity as well)*
>
>
> Now on the client side I want to create a new *Entry* with some user
> content and attach to that *Entry* the *Topic* which I happen to have
> already in the client (brought it before with *RequestFactory*). So I do:
>
>
> entry.setText(review); //an String
>
> entry.setTopic(topic);
>
> entryService.saveEntry(entry).fire(new Receiver......)
>
>
> However, I always receive a very weird null Exception on the Receiver's
> onFailure:
>
>
> - getMessage gives: Error: Server Error: null
> - stacktracestring is null
> - requestContext is com.mmr.shared.service.EntryServiceImpl@5d95bef6,
> which is my service implementation but I have put a breakpoint and it
> never
> gets in.
>
> When I remove the *setTopic* call, the service succeeds (as long as I
> deal with the then null argument). So I believe the problem is in the
> setTopic but I don't know how to solve it neither how to workaround.
>
> Can you help me? I am a newbie to GWT and Web programming in general but
> this seems to me like pretty basic functionality in order to add items to a
> graph.
>
> Thanks!
>
Something (probably your setter) is throwing a NullPointerException ('null'
is a symptom of a NPE without specific message).
Set a breakpoint in DefaultExceptionHandler#createServerFailure (on
server-side) so you have access to the exception with its stacktrace.
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