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

Question

我在我的 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 RuntimeError in Devise::InvitationsController#create, Could not find a valid mapping for nil

下面是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

这是所有路线：

前缀动词 URI 模式控制器#Action new_user_session GET /users/sign_in(.:format) 设计/会话#new user_session POST /users/sign_in(.:format) 设计/会话#create destroy_user_session 删除 /users/sign_out(.:format) 设计/会话#destroy new_user_password GET /users/password/new(.:format) 设计/密码#new edit_user_password GET /users/password/edit(.:format) 设计/密码#edit user_password PATCH /users/password(.:format) 设计/密码#update PUT /users/password(.:format) 设计/密码#update POST /users/password(.:format) 设计/密码#create cancel_user_registration GET /users/cancel(.:format) devise_invitable/registrations#cancel new_user_registration GET /users/sign_up(.:format) devise_invitable/registrations#new edit_user_registration GET /users/edit(.:format) devise_invitable/registrations#edit user_registration PATCH /users(.:format) devise_invitable/registrations#update PUT /users(.:format) devise_invitable/registrations#update 删除 /users(.:format) devise_invitable/registrations#destroy POST /users(.:format) devise_invitable/registrations#create accept_user_invitation GET /users/invitation/accept(.:format) 设计/邀请#edit remove_user_invitation GET /users/invitation/remove(.:format) 设计/邀请#destroy new_user_invitation GET /users/invitation/new(.:format) 设计/邀请#new user_invitation PATCH /users/invitation(.:format) 设计/邀请#update PUT /users/invitation(.:format) 设计/邀请#update POST /users/invitation(.:format) 设计/邀请#create 根 GET / 仪表板#index rails_service_blob GET /rails/active_storage/blobs/:signed_id/*filename(.:format) active_storage/blobs#show rails_blob_representation GET /rails/active_storage/representations/:signed_blob_id/:variation_key/*filename(.:format) active_storage/representations#show rails_disk_service GET /rails/active_storage/disk/:encoded_key/*filename(.:format) active_storage/disk#show update_rails_disk_service PUT /rails/active_storage/disk/:encoded_token(.:format) active_storage/disk#update rails_direct_uploads POST /rails/active_storage/direct_uploads(.:format) active_storage/direct_uploads#create

• 我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 生成 devise_invitable 用户

  rails db:迁移

  rails 生成 devise_invitable:views

  重启 Rails 服务器

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

我怎样才能摆脱这个问题。请帮帮我

Answer 1

终于在Scambra的帮助下解决了这个问题

我刚刚更改了我的应用程序控制器

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