[TYPO3-extbase] Custom Controller action: Flexform is empty

[Markus Kobligk]

Hi,

I have added an own controller action in the function configurePlugin() 
in ext_localconf.php named "listJson". Works well, but I can't get any 
flexform values defined in the plugin, it's always NULL in this action.

Does the flexform have to be initialized manually somehow when using 
custom controller actions other than list and show?

How do I get this working?

Thank you for any links or hints.

Best regards,
Markus