I've got a controller with an update method that updates the model attribute, sets a flash notice for the user if successful and then renders the edit page again. The next link I click on the same flash notice pops up a second time when it loads/renders the page. What's going on? How do I get the flash[:notice] to show up only once? Why is it persisting into the next response?

controller:

```
def update
  respond_to do |format|
    if @resource.update_attributes(params[:resource])
      flash[:notice] = "Resource successfully updated"
      format.html{ render :action => "edit" }
    else
      format.html{ render :action => "edit" }
    end
  end
end  

```