ActiveAdmin has_many通過關係不更新param Rails

Question

我正在通過在活動管理中創建一個has_many：through關係來工作。下面是模型因爲他們的立場：

class Category < ActiveRecord::Base 
    has_many :subcategories 
end 

class Subcategory < ActiveRecord::Base 
    has_many :product_in_subcategories 
    has_many :products, through: :product_in_subcategories 
    accepts_nested_attributes_for :product_in_subcategories, :allow_destroy => true 

    belongs_to :category 
end 

class Product < ActiveRecord::Base 
    has_many :product_in_subcategories 
    has_many :subcategories, through: :product_in_subcategories 
    accepts_nested_attributes_for :product_in_subcategories, :allow_destroy => true 
end 

class ProductInSubcategory < ActiveRecord::Base 
    belongs_to :product 
    belongs_to :subcategory 
end 

在ActiveAdmin我有permit_params，形成像這樣：

ActiveAdmin.register Product do 
    # note some params that are product only have been removed for simplicity 
    permit_params :name, subcategory_id:[:id], product_in_subcategories_attributes: [:id, :subcategory_id, :product_id, :_create, :_update] 

    form do |f| 
     f.inputs 

     f.has_many :product_in_subcategories do |s| 
      s.input :subcategory_id, :as => :check_boxes, :collection => Subcategory.all 
     end 

     f.actions 
    end 
end 

形式填充爲應，拯救一切除了subcategory_id。如果我在數據庫中輸入了一個合適的子類別標識，那麼該框會顯示在編輯時檢查。

節省給予時消息：

Unpermitted parameters: subcategory_id 

然而，似乎它試圖與產品，對此沒有一個subcategory_id提交此。關於我在這裏做錯了什麼的想法？這讓我瘋狂，我已經閱讀了所有我能找到的東西。我真的很想明白我做錯了什麼。謝謝。

Answer 1

在花了很多時間在這個之後，我找不到一個合適的解決方案，除了這個，其實非常好。它其實不是來自我預想的解決方案非常不同：

上面的代碼中的唯一變化是在ActiveAdmin提出：

ActiveAdmin.register Product do 
    # note some params that are product only have been removed for simplicity 
    permit_params :name, product_in_subcategories_attributes: [:id, :subcategory_id, :product_id, :_create, :_update] 

     form do |f| 
     f.inputs 

     f.has_many :product_in_subcategories do |s| 
      s.input :subcategory_id, :as => :select, :collection => Subcategory.all 
     end 

     f.actions 
     end 
end 

很奇怪，怎麼這使得沒有問題一個選擇框，但它翻轉超出複選框。儘管如此，我對解決方案感到滿意。