If I understand your question correctly, the answer is yes, id is the name of the filter. Here's the find_filter method:

```ruby
 def find_filter
    id = params[:id] || params[:filter_id]
    @filter = Filter.where(:name => id, :content_view_definition_id => @definition).first
    raise HttpErrors::NotFound, _("Couldn't find filter '%s'") % params[:id] if @filter.nil?
    @filter
  end
```