I have a Category Model and a SubCategory Model and id like the SubCategory select input to refresh depending on the SubCategories that are associated to the specific Category I have selected.

```
form do |f|
    f.inputs do
        f.input :title
        f.input :category, as: :select, collection: Category.all, :input_html => { :class => 'chzn-select', :width => 'auto', "data-placeholder" => 'Click' }
        f.input :sub_category, as: :select, collection: SubCategory.all, :input_html => { :class => 'chzn-select', :width => 'auto', "data-placeholder" => 'Click' }
    end
    f.actions
end

```