Rails：未初始化的常量控制器

Question

这是我的设置：

路线：

resources :apps, except: [:index, :new], path: 'a' do
    resources :platforms, only: [:update]
end

控制器：

class Apps::PlatformsController < ApplicationController

    before_action :authenticate_user!
    before_action :set_platform

    # PATCH/PUT /apps/1/platforms/1
    # PATCH/PUT /apps/1/platforms/1.json
    def update
        # do stuff ...
    end

    private

    # Use callbacks to share common setup or constraints between actions.
    def set_platform
        @platform = App::Platform.find params[:id]
    end

end

查看：

= link_to 'Update', app_platform_url(platform.app.slug, platform.id), method: :put

点击链接时，出现以下错误：

  

未初始化的常量PlatformsController

为什么Rails会查找PlatformsController而不是Apps::PlatformsController？

Answer 1

据我所知，namespace和scope需要嵌套模块。