Use one action for get and post

Simple example that shows how to use a single controller action to handle both get and post requests. This really comes in handy for those situations where you need to handle multiple objects.

def new
  if request.get?  # no post data, so create a new instance and render the template
    @post = Post.new
  else  # post-part, form was filled out and we can save the post
    @post = Post.new(params[:post])
    if @post.save
      flash[:notice] = 'Post was successfully created.'
      redirect_to :action => 'index'
    else
      render :action => 'new'
    end
  end
end