Destroy association in memory

Hi,
Does Rails antipode of build method?
Build make object in memory, and save it to database when parent
object is saved.
I need method to destroy object in memory and remove it from database
when parent object is saved.
mark_for_destruction is not the answer, because it not destroy object,
only mark it.

Thanks,
Anatoliy.

Hi Anatoliy,

Hi Everyone,
Thanks for responses,
I found what I need: http://rails.lighthouseapp.com/projects/8994/tickets/4521-habtm-ability-to-link-and-unlink-records-with-autosave-true

Thanks,
Anatoliy.