Rails: redirect_to :controller=>'tips', :action => 'show', :id => @tip.permalink

I tried to redirect rails to show action by passing controller, action, and params. However, rails ignores the name of action totally!

what I got is http://mysite/controllername/paramId

so i have error message....

here is the action code I used:

def update
    @tip = current_user.tips.find(params[:id])
    @tip.attributes = params[:tip]
    @tip.category_ids = params[:categories]
    @tip.tag_with(params[:tags]) if params[:tags]


    if @tip.save
      flash[:notice] = 'Tip was successfully updated.'
      redirect_to :controller=>'tips', :action => 'show', :id => @tip.permalink
    else
      render :action => 'edit'
    end
  end