```ruby
class SearchSelectInput < ActiveAdminAddons::InputBase
  include ActiveAdminAddons::SelectHelpers

  def render_custom_input
    concat(label_html)
    concat(builder.select(input_method,
                          initial_collection_to_select_options, {}, input_html_options))
  end

  def input_method
    valid_method
  end

  def load_control_attributes
    load_class(@options[:class])
    load_data_attr(:fields, default: ["name"], formatter: :to_json)
    load_data_attr(:url, default: url_from_method)
    load_data_attr(:response_root, default: tableize_method)
    load_data_attr(:display_name, default: "name")
    load_data_attr(:minimum_input_length, default: 1)
    load_data_attr(:width, default: "80%")
    load_data_attr(
      :order,
      value: @options[:order_by],
      default: get_data_attr_value(:fields).first.to_s + "_desc"
    )
  end
end
```

Support per_page and multible attribiutes for AJAX Search Select.
user
```ruby
class SearchSelectInput < ActiveAdminAddons::InputBase
  include ActiveAdminAddons::SelectHelpers

  def render_custom_input
    concat(label_html)
    concat(builder.select(input_method,
                          initial_collection_to_select_options, {}, input_html_options))
  end

  def input_method
    valid_method
  end

  def load_control_attributes
    load_class(@options[:class])
    load_data_attr(:fields, default: ["name"], formatter: :to_json)
    load_data_attr(:url, default: url_from_method)
    load_data_attr(:response_root, default: tableize_method)
    load_data_attr(:display_name, default: "name")
    load_data_attr(:minimum_input_length, default: 1)
    load_data_attr(:width, default: "80%")
    load_data_attr(:multiple, default: false)
    load_data_attr(:per_page, default: 30)
    load_data_attr(
      :order,
      value: @options[:order_by],
      default: get_data_attr_value(:fields).first.to_s + "_desc"
    )
  end
end
```
assistant