[TYPO3-dev] Extbase: Setting relational field to empty using frontend´

[Anders Gissel]

Hey y'all,

I'm building an Extbase-extension (6.0.1), and my model has a field that 
relates to another table using a simple dropdown. The user can then 
select a single value, and all is fine.

However: once the user has selected (and saved) a value, he can't empty 
the field again... I've added an empty value to both the frontend 
selector and the TCA, but apparently setting an empty value is the same 
as selecting nothing at all. Therefore, the only way to empty the field 
is to do it through the backend. Selecting a different value works just 
fine, but obviously that's not what I'm after.

My question then is: how do I empty the field from the frontend? Once 
the data reaches the controller's updateAction() it has already been 
processed, so how do I go about it? Can anyone recommend any material on 
the subject?


Best regards,
Anders