Rails 7中Supervisor登录后重定向出错引发500错误求助

问题描述 #

尽管已创建会话，但无法以Supervisor身份完成登录。

控制台日志 #

Started GET "/supervisor_session/new" for 127.0.0.1 at 2023-12-12 22:03:32 +0200
Processing by SupervisorSessionController#new as TURBO_STREAM
  Rendering layout layouts/application.html.erb
  Rendering supervisor_session/new.html.erb within layouts/application
  Rendered supervisor_session/new.html.erb within layouts/application (Duration: 4.3ms | Allocations: 1988)
  Rendered layout layouts/application.html.erb (Duration: 7.4ms | Allocations: 4361)
Completed 200 OK in 22ms (Views: 8.8ms | ActiveRecord: 0.7ms | Allocations: 11337)


Started POST "/supervisor_session" for 127.0.0.1 at 2023-12-12 22:03:37 +0200
Processing by SupervisorSessionController#create as TURBO_STREAM
  Parameters: {"authenticity_token"=>"[FILTERED]", "supervisor"=>{"email"=>"root@root.root", "password"=>"[FILTERED]"}, "commit"=>"Login"}
  Supervisor Load (0.2ms)  SELECT "supervisors".* FROM "supervisors" WHERE "supervisors"."email" = ? LIMIT ?  [["email", "root@root.root"], ["LIMIT", 1]]
  ↳ app/controllers/supervisor_session_controller.rb:7:in `create'
#<Supervisor id: 2, first_name: "root", last_name: "root", password_digest: [FILTERED], password_salt: [FILTERED], email: "root@root.root", phone_number: "00">Redirected to http://localhost:3000/administrator_session/main_menu/new?allow_other_host=true

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                             LOOK HERE

Completed 302 Found in 337ms (ActiveRecord: 0.2ms | Allocations: 2839)


Started GET "/administrator_session/main_menu/new?allow_other_host=true" for 127.0.0.1 at 2023-12-12 22:03:38 +0200
Processing by MainMenuController#new as TURBO_STREAM
  Parameters: {"allow_other_host"=>"true"}
Completed 500 Internal Server Error in 1ms (ActiveRecord: 0.0ms | Allocations: 734)


  
ArgumentError (wrong number of arguments (given 0, expected 2)):
  
app/helpers/logged_in_user_helper.rb:8:in `LoggedInUserConstructor'
app/controllers/main_menu_controller.rb:4:in `new'

SupervisorSessionController代码 #

class SupervisorSessionController < ApplicationController
  def new
    @supervisor = Supervisor.new
  end

  def create
    @supervisor = Supervisor.find_by(email: params[:supervisor][:email])
    print @supervisor.inspect
    if @supervisor && @supervisor.authenticate(params[:supervisor][:password])
      session[:supervisor_id] = @supervisor.id
      session[:first_name]    = @supervisor.first_name
      session[:last_name]     = @supervisor.last_name
      respond_to do |format|
        format.html {redirect_to controller: :main_menu, action: :new , allow_other_host: true}
      end
          
    else
      flash[:alert] = "Login failed"
      render "new"
    end
  end

  def destroy
    session[:supervisor_id] = nil
    redirect_to '/', flash: { error: "Please Retry" }
  end

  private
      # Only allow a list of trusted parameters through.
    def supervisor_session__params
      params.require(:supervisor_session).permit(:email,:password_digest)
    end
end

错误分析与解决方案 #

从日志可见，Supervisor身份验证已通过（成功查询到用户并完成校验，执行了重定向），但重定向到MainMenuController#new时触发参数错误：LoggedInUserConstructor方法要求2个参数，调用时未传入任何参数。

解决步骤： #

1. 检查MainMenuController#new方法第4行，确认调用LoggedInUserConstructor时是否遗漏参数。
2. 打开app/helpers/logged_in_user_helper.rb查看第8行的方法定义，明确所需参数类型（如用户ID、用户类型）。
3. 在MainMenuController#new中从session读取supervisor_id，并传入用户类型（如:supervisor），示例：

   def new
     LoggedInUserConstructor(session[:supervisor_id], :supervisor)
     # 其他业务逻辑
   end
   

4. 移除重定向时的allow_other_host: true参数（本地环境无跨域需求，避免冗余参数干扰）：

   format.html { redirect_to controller: :main_menu, action: :new }
   

5. 在MainMenuController中先校验session[:supervisor_id]是否存在，确保用户已登录后再执行后续逻辑。

内容的提问来源于stack exchange，提问作者user199135