[TYPO3-mvc] extbase: Use another field than uid for action controllers

[Christian Essl]

Hi,

As far as i know, extbase automatically uses the "tx_myext_myctrl[objectname]"-parameter to look up the uid of the appropiate database-record for an action.

But in my case I need to pass the value of  another database-field, which would be the key field to look up the record.

How can I tell extbase to simply use another field than "uid"?

Regards,
Christian