[TYPO3-mvc] f:form.checkbox and ObjectStorages

[Philipp]

I know, the same question for the 10th time, but seriously

i simply cant achieve it!

How can i create a model an set relations to other models via fluid/extbase?

<f:for each="{models}" as="mode" iteration="i">
<f:form.checkbox property="storage.{i.index}" value="{model}"/>
</f:for>

just does not work for me.... 

how is this supposed to be used?