Rails助手“集合选择”

你有没有想过让你自己的助手滚蛋?我刚把这段代码从 rails source 然后改了名字加了标题。

  def options_for_select_with_title(container, selected = nil)
    return container if String === container

    container = container.to_a if Hash === container
    selected, disabled = extract_selected_and_disabled(selected)

    options_for_select = container.inject([]) do |options, element|
      text, value = option_text_and_value(element)
      selected_attribute = ' selected="selected"' if option_value_selected?(value, selected)
      disabled_attribute = ' disabled="disabled"' if disabled && option_value_selected?(value, disabled)
      options << %(<option title="#{html_escape(value.to_s.downcase)}" value="#{html_escape(value.to_s)}"#{selected_attribute}#{disabled_attribute}>#{html_escape(text.to_s)}</option>)
    end

    options_for_select.join("\n").html_safe
  end

$('#user_university_id option').each( function(){
    var optText = $(this).html();
    $(this).attr('title', optText);
})

这将为标题分配选项的文本内容。或者,您可以使用生成的ID执行更随意的操作。