Re: requestfactory don't allow appengine parent relationship ?

On Friday, December 31, 2010 12:18:44 AM UTC+1, Simon Majou wrote:

I am using GAE and when I create an entity having parents with Request Factory, I get this exception:

com.googlecode.objectify.NotFoundException: No entity was found matching the key: Key{kindClassName=com.pipo.MyEntity, parent=null, id=2}

This exception is launched when calling:

public static MyEntity findMyEntity(Long id) {

return ObjectifyService.begin().get(MyEntity.class, id);

}

Obviously the parent ID is missing from this method. But requestfactory requires this method with this exact signature ...

Actually, not at all!

RequestFactory mandates (if you're not using a locator) that you have a static findMyEntity method that returns a MyEntity instance and takes as argument an ID for MyEntity.

I don't know Objectify but from the little I saw in the javadoc, your ID would have to be a Key<?> if you want the parent relationship, and not a Long. This means your getId accessor would have to return a Key too. It also means you have to map the Key class to a ValueProxy (same as EntityProxy but without the getId/getVersion/findXxx constraints).

 

So I think I need to inject by myself the parent id into that method.

To do that I should use the ServiceLayer API right ?

No. 

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