ruby-on-rails - 未初始化的常量 API::V1::UserController

Question

我知道在 stackoverflow 上已经有很多关于此的问题，但没有一个适用于我的情况。

在我的routes.rb

Exer9::Application.routes.draw do
    namespace :api, defaults: {format: 'json'} do
        namespace :v1 do
            resources :users
        end
    end
  end

exer9/app/controllers/api/v1/users_controller.rb

module Api
  module v1
     class UsersController < ApplicationController

      # GET /user
      # GET /user.json
      def index
        @users = User.all

        render json: @users
      end

      def new
      end

      def update
      end
      # GET /user/1
      # GET /user/1.json
      def show
        @user = User.find(params[:id])

        render json: @user
      end

      def create
        @user = User.new(params[:user])

        if @user.save
          render json: @user
        else
          render json: @user.errors
        end

      end

      def delete
      end

      def destroy
      end
end
end
end

更新

这是我的ApplicationController文件

class ApplicationController < ActionController::API
  # Prevent CSRF attacks by raising an exception.
  # For APIs, you may want to use :null_session instead.
  # protect_from_forgery with: :exception

end

我得到的错误信息是:

superclass mismatch for class UsersController

Extracted source (around line #2):
1
2
3
4
5
6


     class Api::V1::UsersController < ApplicationController

      # GET /user
      # GET /user.json
      def index

Rails.root: /home/steven/Desktop/weekly-exercises/exer9

Application Trace | Framework Trace | Full Trace
app/controllers/api/v1/users_controller.rb:2:in `<top (required)>

'

非常感谢这里的任何帮助!

Answer 1

使用更短的语法，例如:

class Api::V1::UsersController < ApplicationController
  # your code goes here
end

另外，重命名类和文件后是否重启 rails server？