[TYPO3-mvc] problem with sql update persistence layer

[Jochen Landvoigt]

  hi,

I have a db table product wich has an foreign key column to another 
table called country. When i get the objects from the database in my 
extbase controller ( $this->produktRepository->findAll(); ) then i get 
the produkt object with an country object in it. I display the country 
in my fluid template with the select tag:
<f:form.select property="countries" name="countries" 
options="{countries}" optionValueField="uid" 
optionLabelField="name"><select><option>dummy</option></select></f:form.select>

When i try to update the object the value of the country is correct set 
in object that is delivered to the updateAction in my controller. (the 
attribute country holds the new country object that i have selected in 
the form) but when i call $this->produktRepository->update($produkt); 
only the other attributes of the object are updated but not the new 
selected country.

the same problem exists in the blog_example plugin with the 
administrator field in the edit field blog in my installation. (typo3 4.4.2)

has anyone a hint what is going wrong!?

thanks

regards

jochen