Set filter for one column and clear filters for other columns

If you have filters set for a page and want to filter only by one column, then use filter_cmd=set for a link.

example:

controller:

search_filter :index, {save_session: true, search_method: :post_and_redirect, url: :products_url, search_url: :search_products_url, search_action: :search} do
    default_order "price", 'desc'

    field :title, :string, :text, {label: 'Title', default_value: '', condition: :like_full, input_html: {style: "width: 240px"} }
    field :price_from, :string, :text, {label: 'Price', default_value: '', condition: :custom, condition_where: 'price >= ?', input_html: {style: "width: 140px"} }
    field :price_to, :string, :text, {label: 'to', default_value: '', condition: :custom, condition_where: 'price <= ?', input_html: {style: "width: 140px"} }


    field :category_id, :int,  :select, {label: 'Category', default_value: 0, ignore_value: 0, collection: Category.all, label_method: :title, value_method: :id, include_blank: true }

    
  end

view:

=link_to 'Products in category 1', products_path(filter_cmd: 'set', category_id: 1)

After you click the link it will show products in that category - no matter what filters were set before.