rails: put and interruption in before filter

Question

I want a before filter like "must_have_permission_to_write" that when called if user hasn't permission to write renders a message saying "you can't do that!" and return.

Problem is I'm getting "can only render or redirect once per action" of course... how can I stop the execution in the before filter? thanks

Answer 1

Just add the and return, like doing:

before_filter :must_have_permission_to_write

def must_have_permission_to_write
  redirect_to login_path and return unless current_user
end

Answer 2

I think the easiest answer is add a redirect and return false to your must_have_permission_to_write method.

def must_have_permission_to_write
  unless current_user.has_permission?(something)
    redirect_to access_denied_path 
    return false
  end
end

Then, create an action for access denied somewhere, add the route, and put whatever you want in the template.