Devise :: InvitationsController＃create中的RuntimeError，找不到nil的有效映射

Question

我在Rails 5应用程序中使用devise_invitable gem。每次提交“发送邀请”按钮后，我都会收到错误Devise :: InvitationsController＃create中的RuntimeError，找不到nil的有效映射

这是application_controller.rb文件的代码：

class ApplicationController < ActionController::Base
    protect_from_forgery with: :exception
    before_action :configure_permitted_parameters, if: :devise_controller?

    def authenticate_inviter!
        unless current_user.role=='Manager'
            if current_user.role == "Developer"
                redirect_to root_path, :alert => "Access Denied! Only Manager Can Add New Developer"
            end
            super
        end
    end
    protected
    def configure_permitted_parameters
        added_attrs = [ :email, :password, :password_confirmation ]
        devise_parameter_sanitizer.permit :sign_up, keys: added_attrs
        devise_parameter_sanitizer.permit :account_update, keys: added_attrs
        devise_parameter_sanitizer.permit :accept_invitation, keys: [:email]
    end
end

这里是User.rb的代码：

class User < ApplicationRecord
    include DeviseInvitable::Inviter
    devise :invitable, :database_authenticatable, :registerable,
     :recoverable, :rememberable, :validatable
end

这里是Route.rb

Rails.application.routes.draw do
    devise_for :users
    root 'dashboard#index'
end

这里是所有路线：

前缀动词URI模式控制器#Actionnew_user_session GET /users/sign_in(.:format）devise / sessions＃newuser_session POST /users/sign_in(.:format）devise / sessions＃createdestroy_user_session DELETE /users/sign_out(.:format）devise / sessions＃destroynew_user_password GET /users/password/new(.:format）devise / passwords＃newedit_user_password GET /users/password/edit(.:format）devise / passwords＃edituser_password修补程序/users/password(.:format）devise / passwords＃updatePUT /users/password(.:format）devise / passwords＃updatePOST /users/password(.:format）devise / passwords＃createcancel_user_registration GET /users/cancel(.:format）devise_invitable / registrations＃cancelnew_user_registration GET /users/sign_up(.:format）devise_invitable / registrations＃newedit_user_registration GET /users/edit(.:format）devise_invitable / registrations＃edituser_registration修补程序/users(.:format）devise_invitable / registrations＃updatePUT /用户（。：format）devise_invitable / registrations＃update删除/users(.:format）devise_invitable / registrations＃destroyPOST /users(.:format）devise_invitable / registrations＃createaccept_user_invitation GET /users/invitation/accept(.:format）devise / invitations＃editremove_user_invitation GET /users/invitation/remove(.:format）设计/邀请#destroynew_user_invitation GET /users/invitation/new(.:format）devise / invitations＃newuser_invitation PATCH /users/invitation(.:format）devise / invitations＃updatePUT /用户/邀请（。：格式）设计/邀请＃更新POST /用户/邀请（。：format）设计/邀请＃创建根GET /仪表板#indexrails_service_blob GET / rails / active_storage / blobs :: signed_id / *文件名（。：format）active_storage / blobs＃showrails_blob_representation GET /rails/active_storage/representations/:signed_blob_id/:variation_key/*filename(.:format）active_storage / representations＃showrails_disk_service GET / rails / active_storage / disk /：encoded_key / *文件名（。：format）active_storage / disk＃showupdate_rails_disk_service PUT /rails/active_storage/disk/:encoded_token(.:format）active_storage / disk＃updaterails_direct_uploads POST /rails/active_storage/direct_uploads(.:format）active_storage / direct_uploads＃create

• 我还没有创建任何自定义邀请控制器。

• 我只是运行以下命令来设置和配置devise_invitable

  gem'devise_invitable'

  捆绑安装

  rails生成devise_invitable：install

  rails产生devise_invitable用户

  rails db：migrate

  rails产生devise_invitable：views

  重新启动Rails服务器

以下是完整错误的图片：see the picture of the complete error

我如何摆脱这个问题。请帮助我

Answer 1

最后，我在Scambra的帮助下解决了这个问题>

我刚刚更改了Application Controller

的逻辑

发件人：

def authenticate_inviter!
    unless current_user.role=='Manager'
        if current_user.role == "Developer"
            redirect_to root_path, :alert => "Access Denied! Only Manager Can Add New Developer"
        end
        super
    end
end
收件人：
def authenticate_inviter!
      if current_user.role == "Developer"
          redirect_to root_path, :alert => "Access Denied! Only Manager Can Add New Developer"
      end
      super
end