找不到路径的 Rails ApplicationController 抛出答案

【问题标题】：Rails ApplicationController throwing not found for path找不到路径的 Rails ApplicationController 抛出
【发布时间】：2020-05-23 11:32:26
【问题描述】：

我在 routes.rb 中有以下内容：

Rails.application.routes.draw do
  resources :users, param: :email
  post '/auth/login', to: 'authentication#login'
  get '/*a', to: 'application#not_found'
  get '/attendance/in', to: 'attendances#in'
  get '/attendance/out', to: 'attendances#out'
  get '/user/get_attendance_status', to: 'users#get_attendance_status'
end

现在，例如，在我的users_controller.rb 中，我有以下操作：

before_action :authorize_request

def get_attendance_status
  render json: { at_work: @current_user.at_work }, status: :ok
end

:authorize_request在application_controller.rb中定义如下：

class ApplicationController < ActionController::API
    def not_found
        render json: { error: 'not_found' }
    end

    def authorize_request
        header = request.headers['Authorization']
        header = header.split(' ').last if header
        begin
            @decoded = JsonWebToken.decode(header)
            @current_user = User.find(@decoded[:user_id])
            rescue ActiveRecord::RecordNotFound => e
                render json: { errors: e.message }, status: :unauthorized
            rescue JWT::DecodeError => e
                render json: { errors: e.message }, status: :unauthorized
        end
    end
end

现在当我通过 Postman 向本地服务器提交请求时，出现以下错误：

Started GET "/user/get_attendance_status" for 58.177.56.127 at 2020-05-23 19:12:49 +0800
Processing by ApplicationController#not_found as HTML
  Parameters: {"a"=>"user/get_attendance_status"}
Completed 200 OK in 2ms (Views: 1.1ms | ActiveRecord: 0.0ms | Allocations: 93)


Started GET "/attendance/in" for 58.177.56.127 at 2020-05-23 19:13:14 +0800
Processing by ApplicationController#not_found as HTML
  Parameters: {"a"=>"attendance/in"}
Completed 200 OK in 1ms (Views: 0.3ms | ActiveRecord: 0.0ms | Allocations: 91)

如您所见，application_controller#not_found 被触发，但为什么呢？我不确定为什么会这样。任何见解将不胜感激。

【问题讨论】：

标签： ruby-on-rails ruby-on-rails-6

【解决方案1】：

路由按照出现的顺序匹配，所以是的，你的 a* 路由应该放在最后。问题是你为什么需要这条路线？如果路由不存在，Rails 会自动返回 404。

【讨论】：

它返回一个 json

【解决方案2】：

我不得不将 get '/*a', to: 'application#not_found' 路由移到底部，所以我的 routes.rb 现在看起来像这样：

Rails.application.routes.draw do
  resources :users, param: :email
  post '/auth/login', to: 'authentication#login'
  get '/attendance/in', to: 'attendances#in'
  get '/attendance/out', to: 'attendances#out'
  get '/user/get_attendance_status', to: 'users#get_attendance_status'
  get '/*a', to: 'application#not_found'
end

【讨论】：