# [Rails4]關聯式資料的MVC:以主分類(Cat)及次分類(SUbcat)為例

###### tags: `Rails4`

Cat與Subcat為1對多的關係

routes:

 namespace :admin do
      resources :cats do
        resources :subcats
      end
      
    end

view(部份):
編輯次分類

<%= link_to  "edit", admin_cat_subcat_path(id: subcat.id,cat_id: subcat.cat_id) %>

model:

Cat

class Cat < ActiveRecord::Base
  has_many :subcats,dependent: :destroy
end

Subcat

class Subcat < ActiveRecord::Base
  belongs_to :cat
end