active admin如何在未创建对象时在索引页面上呈现表单

ActiveAdmin.register YourModel do
  # ...

  action_item :new, only: :index do
    link_to 'New Your Model', new_admin_your_model_path
  end

  collection_action :new, method: :get do
    @your_model = YourModel.new
  end

  action_item :create, only: :index do
    link_to 'Create Your Model', create_admin_your_model_path, method: :post
  end

  collection_action :create, method: :post do
    @your_model = YourModel.new(your_model_params)
    if @your_model.save
      redirect_to admin_your_models_path, notice: 'Your Model created successfully.'
    else
      render :new
    end
  end

  # ...

  controller do
    def your_model_params
      params.require(:your_model).permit(:attribute1, :attribute2, ...)
    end
  end
end

<%= active_admin_form_for [:admin, @your_model] do |f| %>
  <%= f.inputs 'Your Model Details' do %>
    <%= f.input :attribute1 %>
    <%= f.input :attribute2 %>
    <!-- 添加其他属性字段 -->
  <% end %>
  <%= f.actions %>
<% end %>