[TYPO3-mvc] can I prefil properties in a newAction or pass arguments to a validator?

[Rolf Nakielski]

Hello List,

I'm writing an extention where I have an object "track" belonging to an object "release":

release -> 1:n -> track

In track I have a property "name" and I want to check that there are unique names in all 
tracks of a release.
There is a Validator "Tx_FkExtention_Domain_Validator_TrackValidator" where I try to do it. 
This works well
for edit/update but when I create a new track the release is not yet a filled property of 
the track. The release
is set in the createAction.

So what can I do?
I tried to check this in the createAction itself - but I think this is not the right way. I 
had to call errorAction from createAction and loose all property values this way. An Object 
should be valid when it is getting into the createAction.

Is there a way to have this "release" property set by the newAction - so I can use it 
allways for validation? I would  need to pass the release to the track constructor somehow?

Or is there a way to pass the release to the validator?

Any hint can help. Thank you
I'm using extbase 1.3 that was shipped by TVPO3 4.5