Ruby on rails rails路线的模板选项

假设我的

routes.rb文件中有以下内容

json_request_only = {
  defaults:    { format: :json }, 
  constraints: { format: :json }
}

ajax_server = {
  only: [:create, :destroy]
}.merge(json_request_only)

Rails.application.routes.draw do

  root to: 'home#index'

  get 'contact/us/:section', to: 'home#contactus', as: 'contact_us'

  resources :uploaded_files, ajax_server

  # only to create/delete shopping carts and only excepts JSON format
  resources :shopping_carts, ajax_server

  resources :item_types, :path => "category", json_request_only do
    member do 
      delete :delete_image
      delete :archive
      patch :recover
    end
  end
end

我得到以下错误

unexpected keyword_do_block, expecting => ategory", json_request_only do
                                                                       ^
意外的关键字\u do\u块，应为=>ategory“，json\u请求\u仅执行
^
我试图做的是在路由中使用一些模板选项

问题:
我怎样才能解决这个问题？
我很确定您必须像这样合并选项

resources :item_types, json_request_only.merge(path: "category") do