如何處理ActiveAdmin中的多個嵌套資源？

我在Rails（3.1.1）中使用ActiveAdmin（0.4.0）。如何處理ActiveAdmin中的多個嵌套資源？

我找不到一個很好的方法/破解來處理多個嵌套的資源。

Considerer 3個型號爲：

class Program < ActiveRecord::Base 
    has_many :knowledges, :dependent => :destroy 
end 

class Knowledge < ActiveRecord::Base 
    belongs_to :program 
    has_many :steps, :dependent => :destroy 
end 

class Step < ActiveRecord::Base 
    belongs_to :knowledge 
end

而且ActiveAdmin資源：

ActiveAdmin.register Program do 
end 

ActiveAdmin.register Knowledge do 
    belongs_to :program 
end 

ActiveAdmin.register Step do 
    belongs_to :knowledge 
end

在routes.rb中：

namespace :admin do 
    resources :programs do 
    resources :knowledges do 
     resources :steps 
    end 
    end 
end

這裏的網址，程序的索引，知識和步驟：
http://localhost:3000/admin/programs
http://localhost:3000/admin/programs/1/knowledges
http://localhost:3000/admin/programs/1/knowledges/1/steps

的「知識」管理員，但「步驟」管理員不保持嵌套的情況下沒有問題。

例如，當我使用步驟＃索引過濾器我重定向到：
http://localhost:3000/admin/knowledges/1/steps?params ...
但它必須是：
http://localhost:3000/admin/programs/1/knowledges/1/steps?params ...當我創建

同樣的問題新資源：
http://localhost:3000/admin/knowledges/1/steps/new
相反的：
http://localhost:3000/admin/programs/1/knowledges/1/steps/new

相同的p roblem與麪包屑......等等......

我已經在應用/管理/ steps.rb到目前爲止已經試過：

ActiveAdmin.register Step do 

    belongs_to :knowledge 

    config.clear_action_items! 
    action_item :only => :index do 
    link_to('Create Step', new_admin_program_knowledge_step_path(knowledge.program.id, knowledge.id)) 
    end 

    index do 
    column :id 
    column :knowledge 
    column :title 
    column "Actions" do |step| 
     link_to("Voir", admin_program_knowledge_step_path(step.knowledge.program, step.knowledge, step), :class => "member_link show_link") +\ 
     link_to("Editer", edit_admin_program_knowledge_step_path(step.knowledge.program, step.knowledge, step), :class => "edit_knowledge member_link edit_link", :id => "knowledge_#{dom_id(knowledge)}") +\ 
     link_to("Supprimer", admin_program_knowledge_step_path(step.knowledge.program, step.knowledge, step), :class => "member_link delete_link", :method => :delete, :confirm => "Delete?") 
    end 
    end 

    filter :id 
    filter :title 
    filter :subtitle 
    filter :stage_type 
    filter :order_by 
    filter :created_at 
    filter :updated_at 

    form :partial => "form" 

end

而且在應用程序/視圖/管理/措施/ _form。 html.erb我必須使用activeadmin formbuilder：

<%= semantic_form_for(resource, :url => admin_program_knowledge_steps_path(resource.knowledge.program, resource.knowledge), :builder => ActiveAdmin::FormBuilder) do |f| 
    f.inputs "Step" do 
    f.input :knowledge, :as => :hidden 
    f.form_buffers.last << f.template.content_tag(:li, f.template.content_tag(:label, "Knowledge")+f.template.content_tag(:p, f.object.knowledge.title)) 
    f.input :title 
    f.input :order_by 
    end 
    f.buttons 
end %>

嗯......我被困。

如何處理這個很好？任何線索讚賞...

來源

2012-02-05 fro_oo