@Embedded List<Long> fails to save

[carchrae]

I have something like this in my class
...

@Embedded
List resourceIds;

...

and this exception is thrown when I try to save (using Crud Sienna)

@67ndac4je
Internal Server Error (500) for request GET /admin/resourcegroups/11/
resourceIds/list/add

Oops: SienaException
An unexpected error occured caused by exception SienaException:
java.lang.InstantiationException: java.lang.Long

play.exceptions.UnexpectedException: Unexpected Error
at
play.modules.crudsiena.CrudSienaUtils.addListElement(CrudSienaUtils.java:
48)
at controllers.CRUD.addListElement(CRUD.java:96)
at play.mvc.ActionInvoker.invokeWithContinuation(ActionInvoker.java:
546)
at play.mvc.ActionInvoker.invoke(ActionInvoker.java:500)
at play.mvc.ActionInvoker.invokeControllerMethod(ActionInvoker.java:
476)
at play.mvc.ActionInvoker.invokeControllerMethod(ActionInvoker.java:
471)
at play.mvc.ActionInvoker.invoke(ActionInvoker.java:159)
at Invocation.HTTP Request(Play!)
Caused by: siena.SienaException: java.lang.InstantiationException:
java.lang.Long
at siena.Util.createObjectInstance(Util.java:370)
at
play.modules.crudsiena.CrudSienaUtils.addListElement(CrudSienaUtils.java:
33)
... 7 more
Caused by: java.lang.InstantiationException: java.lang.Long
at java.lang.Class.newInstance0(Class.java:340)
at java.lang.Class.newInstance(Class.java:308)
at siena.Util.createObjectInstance(Util.java:368)
... 8 more

[dwursteisen]

Just for your information : it's not a Siena issue.

In fact, it's seems to be a crud siena issue !

Regarding this file :
https://github.com/mandubian/play-crud-siena/blob/master/src/play/modules/crudsiena/CrudSienaUtils.java

This line can't work with object without no-args constructor (like Long, etc)

Object embedObj = siena.Util.createObjectInstance(embedClass);

[ZiglioUK]

Some thoughts regarding embedded collections in Siena:
https://groups.google.com/d/msg/siena-discuss/iuKEZr-cQDU/3oUBoiZS00kJ