fohow_admin/app/models/product_attr_config.rb

class ProductAttrConfig < ActiveRecord::Base
    has_paper_trail
    self.table_name = 'product_attr_configs'
    has_ancestry
    has_many :products, :foreign_key => :category_id
    validates :name,presence:true
    
    rails_admin do
        navigation_label '商品管理'
        weight -250
        parent ProductAttrKey
        nestable_tree({
            position_field: :position,
            max_depth: 2
        })

        list do 
            filters [:product_id,:attr_key_id]
            field :id
            field :product_id
            field :attr_key_id
            field :type
        end

        show do
            field :id
            field :product_id
            field :attr_key_id
            field :type
        end

        edit do
            field :product_id
            field :attr_key_id
            field :type
        end
    end

end