[TYPO3-mvc] Editing 1:n connections - Fluid forms

[christian oettinger]

Hello all,


I'm new to the List an (sorry!) quite new to Extbase/Fluid as well. 
Maybe my question ist trivial, but I did not find a solution, I hope 
someone can help.

My Model has a Root "Patient". It has some Properties itself, a (1:1) 
child "FirstInfusion" and, amongst others, some (1:n) childs "Diagnosis".

It's fantastically easy to make a new Object in Fluid:

    <f:form.textbox property="country" /><br />
    <f:form.textbox property="firstInfusion.firstInfDate" /><br />
    <f:form.textbox property="diagnosis.0.diagnosisName" /><br />
    <f:form.textbox property="diagnosis.1.diagnosisName" /><br />

Editing the first two cases is also easy:

    <f:form.textbox property="country" /><br />
    <f:form.textbox property="firstInfusion.firstInfDate" /><br />

But I don't understand how to edit the 1:n connection.
The following will create the same Source Code as above, but the Values 
are not loaded. So two new Childs are created:

    <f:form.textbox property="diagnosis.0.diagnosisName" /><br />
    <f:form.textbox property="diagnosis.1.diagnosisName" /><br />

The follwing loop is run, gives out the connected diagnoses - but also 
does not get the values in the Form fields.

    <f:for each="{patient.diagnosis}" as="oneDiagnosis">
       {oneDiagnosis.diagnosisName}
       <f:form.textbox property="oneDiagnosis.diagnosisName" />
    </f:for>

I'm now looking for the right way to approach this.
Thanks a lot fo any hint!

christian (oe)