控制器動作不ChicagoBoss

我努力學習ChicagoBoss MVC Web框架before_呼叫後調用和本教程似乎是一個良好的開端控制器動作不ChicagoBoss

https://github.com/ChicagoBoss/ChicagoBoss/wiki/an-evening-with-chicago-boss

這是所有偉大的和令人興奮的，直到筆者介紹了before_函數來確保required_login被調用。我現在面臨的問題是，list功能停止被調用，這裏是我的代碼

-module(outings_outgoer_controller, [Req]). 
-compile(export_all). 
% -export([list/3]). 

before_ (Action) -> 
    io:fwrite("in before_ Action is: ~s~n", [Action]), 
    case Action of 
     "login" -> 
      ok; 
     "register" -> 
      ok; 
     _ -> 
      io:fwrite(" - login is required for this action!~n", []), %gets printed successfully 
      Outgoer = user_lib:require_login(Req), 
      io:fwrite(" - ~p is logged in~n", [Outgoer]), %gets printed successfully 
      Outgoer 
    end. 

list('GET', [], Outgoer) -> 
    io:fwrite("An outgoer is requesting his list~n", []), % never gets printed 
    {ok, [{outgoer, Outgoer}]}

這裏是require_login功能

require_login(Req) -> 
    case Req:cookie("user_id") of 
     undefined -> {redirect, "/outgoer/login"}; 
     Id -> 
      case boss_db:find(Id) of 
       undefined -> {redirect, "/outgoer/login"}; 
       Outgoer -> 
        case Outgoer:session_identifier() =:= Req:cookie("session_id") of 
         false -> {redirect, "/outgoer/login"}; 
         true -> {ok, Outgoer} 
        end 
      end 
    end.

，這是打印我在控制檯中看到在訪問outgoer/list

in before_ Action is: list 
    - login is required for this action! 
    - {ok,{outgoer,"outgoer-1","mohamed","[email protected]", 
      "a982ff46c5664edc593329ab558445fc"}} is logged in 
20:29:31.439 [notice] [ChicagoBoss] The function outings_outgoer_controller:list/2 is not exported, if in doubt add -export([list/2])) to the module 
20:29:31.440 [info] GET /outgoer/list [outings] 200 18ms 
Reloading outings_outgoer_controller ... fail: nofile.

我從https://github.com/ChicagoBoss/ChicagoBoss下載ChicagoBoss和我與Erlang 18工作

來源

2016-07-30 m.awad

事實證明，我得到了通知outings_outgoer_controller:list/2 is not exported，因爲`list'函數編譯失敗，因爲我忘了用點結束函數。反正我得到的提示從http://learnyousomeerlang.com/errors-and-exceptions它說

./module.erl:2：功能some_function/1未定義功能不存在。
您在-export屬性中或聲明函數時寫了錯誤的名稱或參數。當給定函數無法編譯時，也會輸出此錯誤，通常是因爲語法錯誤，例如忘記用句號結束函數。

來源

2016-07-30 22:55:31

控制器動作不ChicagoBoss

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