_advanced_settings_modal_options.html.haml

        %input{ :name => "page_url",
                :type => "text",
                :placeholder => "http://YourProductSite.com",
                :maxlength => 200,
                :"ng-model" => "product_advanced.page_url",
                :"ng-disabled" => "!product_advanced.has_landing_page",
                :"ng-change" => "change(product_advanced)",
                :"ng-required" => "product_advanced.has_landing_page",
                :"enforce-uri-scheme" => "" }