根据rails中另一个下拉列表的值生成下拉列表

<%= select_tag :first_dropdown, options_for_select([['Option 1', '1'], ['Option 2', '2']]) %>

$(document).on('change', '#first_dropdown', function() {
  var selectedValue = $(this).val();
  
  $.ajax({
    url: '/generate_second_dropdown',
    method: 'GET',
    data: { selected_value: selectedValue },
    success: function(response) {
      $('#second_dropdown').html(response);
    }
  });
});

def generate_second_dropdown
  selected_value = params[:selected_value]
  
  # 根据第一个下拉列表的值生成第二个下拉列表的选项
  # 例如，可以从数据库中查询相关数据并生成选项
  
  @second_dropdown_options = [['Option A', 'A'], ['Option B', 'B']]
  
  render partial: 'second_dropdown_options', locals: { options: @second_dropdown_options }
end

<%= render partial: 'second_dropdown_options', locals: { options: @second_dropdown_options } %>

<%= collection_select :second_dropdown, :selected_option, options, :last, :first %>