Show validation error messages from a nested model?

I'm trying to get error messages from a child object to show up on the
view page of the parent object. Line #7 of show view is what I'm
trying to do. What am I missing? If I enter a comment that is less
than 30 characters, I should see some validation errors, no? Thanks
for any help.


    format.html { render :action => "new" } this says to render new
action of comments controller Is that you need or you have to render
show action of movie If that then you can say

render :action => "../movies/show"

instaed of format.html { render :action => "new" }


I see what you're saying. I need to redirect from comments controller
right back to where I was (show action of movies controller). But
with the render, how do I specify the id to the movie that I'm
returning to? Thanks for the help.