[TYPO3-mvc] Nested objects in Fluid forms

[Rens Admiraal]

Hi all,

I'm working on a registration form in which a person object has to be created. 
This person has 3 properties which are an array of other objects (using a MM_ 
table): Account, Address and Group.

The AbstractFormFieldViewHelper has a method called 
addAdditionalIdentityPropertiesIfNeeded which seems to support a property like 
users.userName, but this does not work:
<f:form.textbox property="users.username" />

What is the (best) way to create a nested object in a fluid form?

I've allready read that arrays of objects are not supported by fluid at the 
moment, which is not a big problem because for now we only support 1 account, 
and only 1 address / group during registration. So a 1 to 1 relation is fine 
for now.

Greetz,
Rens