RailsAdmin:如何从自定义操作呈现不同的模型索引

RailsAdmin.config do |config|
  config.actions do
    dashboard                     # 显示仪表盘
    index                         # 显示模型索引
    new
    export
    bulk_delete
    show
    edit
    delete
    show_in_app

    # 自定义操作
    custom_action :my_custom_action do
      only ['ModelName']  # 指定操作生效的模型
      http_methods { [:get] }  # 指定HTTP方法
      controller 'custom_actions'  # 指定处理该操作的控制器
      link_icon 'icon-name'  # 指定操作的图标
    end
  end
end

class CustomActionsController < ApplicationController
  def my_custom_action
    # 自定义操作的逻辑代码
    # 可以根据需要查询模型数据、执行业务逻辑等
    @models = ModelName.all
  end
end

<h1>Custom Action</h1>
<% @models.each do |model| %>
  <p><%= model.attribute_name %></p>
<% end %>

RailsAdmin.config do |config|
  # ...

  config.navigation_static_links = {
    'My Custom Action' => '/admin/my_custom_action'
  }
end