Xml and habtm associations

Hi, I am building an app in rails and i’m having some trouble in passing
model object to xml.
The model name is event and it habtm videos, I’d like to pass the event
information (name, date, description) as well the videos(link, title,
duration) information to xml.
With the code below i was able to pass only the event information to
but not the videos.
def show
@event = Event.find_by_id(params[:id])
respond_to do |format|
format.html # show.html.erb
format.xml { render :xml => @event }

I was hoping to avoid writing rxml files… but if it is not possible
someone can plz pass me a tutorial about it

Thx in advance

Fernando Raganhan Barbosa

“He knows changes aren’t permanent,
But change is.” - Tom Sawyer Rush