A server error occurred. Please contact the administrator. def __str__(self): return '{} :: {}'.format(self, self.title, self.author)이 줄들을 입력하고 cmder 열어서 python manage.py runserver 한 뒤,창을 열고 Post 를 열어보면흰 바탕화면에 A server error occurred. Please contact the administrator. 달랑 이 문구만 나옵니다....그리고 cmder을 확인해보면C:\github\django_my_website (master -> origin) (venv) λ python manage.py runserver Watching for file changes with StatReloader Performing system checks... System check identified no issues (0 silenced). March 19, 2020 - 15:01:28 Django version 2.2, using settings 'my_site_prj.settings' Starting development server at http://127.0.0.1:8000/ Quit the server with CTRL-BREAK. [19/Mar/2020 15:01:30] "GET /admin/blog/ HTTP/1.1" 200 2410 Traceback (most recent call last): File "C:\github\django_my_website\venv\lib\site-packages\django\db\models\options.py", line 565, in get_field return self.fields_map[field_name] KeyError: '__str__' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\github\django_my_website\venv\lib\site-packages\django\contrib\admin\utils.py", line 262, in lookup_field f = _get_non_gfk_field(opts, name) File "C:\github\django_my_website\venv\lib\site-packages\django\contrib\admin\utils.py", line 293, in _get_non_gfk_field field = opts.get_field(name) File "C:\github\django_my_website\venv\lib\site-packages\django\db\models\options.py", line 567, in get_field raise FieldDoesNotExist("%s has no field named '%s'" % (self.object_name, field_name)) django.core.exceptions.FieldDoesNotExist: Post has no field named '__str__' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 34, in inner response = get_response(request) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\base.py", line 145, in _get_response response = self.process_exception_by_middleware(e, request) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\base.py", line 143, in _get_response response = response.render() File "C:\github\django_my_website\venv\lib\site-packages\django\template\response.py", line 106, in render self.content = self.rendered_content File "C:\github\django_my_website\venv\lib\site-packages\django\template\response.py", line 83, in rendered_content content = template.render(context, self._request) File "C:\github\django_my_website\venv\lib\site-packages\django\template\backends\django.py", line 61, in render return self.template.render(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\base.py", line 171, in render return self._render(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\base.py", line 163, in _render return self.nodelist.render(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\base.py", line 937, in render bit = node.render_annotated(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\base.py", line 904, in render_annotated return self.render(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\loader_tags.py", line 150, in render return compiled_parent._render(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\base.py", line 163, in _render return self.nodelist.render(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\base.py", line 937, in render bit = node.render_annotated(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\base.py", line 904, in render_annotated return self.render(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\loader_tags.py", line 150, in render return compiled_parent._render(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\base.py", line 163, in _render return self.nodelist.render(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\base.py", line 937, in render bit = node.render_annotated(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\base.py", line 904, in render_annotated return self.render(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\loader_tags.py", line 62, in render result = block.nodelist.render(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\base.py", line 937, in render bit = node.render_annotated(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\base.py", line 904, in render_annotated return self.render(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\loader_tags.py", line 62, in render result = block.nodelist.render(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\base.py", line 937, in render bit = node.render_annotated(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\base.py", line 904, in render_annotated return self.render(context) File "C:\github\django_my_website\venv\lib\site-packages\django\contrib\admin\templatetags\base.py", line 33, in render return super().render(context) File "C:\github\django_my_website\venv\lib\site-packages\django\template\library.py", line 214, in render _dict = self.func(*resolved_args, **resolved_kwargs) File "C:\github\django_my_website\venv\lib\site-packages\django\contrib\admin\templatetags\admin_list.py", line 339, in result_list 'results': list(results(cl)), File "C:\github\django_my_website\venv\lib\site-packages\django\contrib\admin\templatetags\admin_list.py", line 315, in results yield ResultList(None, items_for_result(cl, res, None)) File "C:\github\django_my_website\venv\lib\site-packages\django\contrib\admin\templatetags\admin_list.py", line 306, in __init__ super().__init__(*items) File "C:\github\django_my_website\venv\lib\site-packages\django\contrib\admin\templatetags\admin_list.py", line 229, in items_for_result f, attr, value = lookup_field(field_name, result, cl.model_admin) File "C:\github\django_my_website\venv\lib\site-packages\django\contrib\admin\utils.py", line 275, in lookup_field value = attr() File "C:\github\django_my_website\blog\models.py", line 14, in __str__ return '{} :: {}'.format(self, self.title, self.author) File "C:\github\django_my_website\blog\models.py", line 14, in __str__ return '{} :: {}'.format(self, self.title, self.author) File "C:\github\django_my_website\blog\models.py", line 14, in __str__ return '{} :: {}'.format(self, self.title, self.author) [Previous line repeated 230 more times] RecursionError: maximum recursion depth exceeded During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 34, in inner response = get_response(request) File "C:\github\django_my_website\venv\lib\site-packages\django\utils\deprecation.py", line 94, in __call__ response = response or self.get_response(request) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 36, in inner response = response_for_exception(request, exc) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 90, in response_for_exception response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info()) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 125, in handle_uncaught_exception return debug.technical_500_response(request, *exc_info) File "C:\github\django_my_website\venv\lib\site-packages\django\views\debug.py", line 94, in technical_500_response html = reporter.get_traceback_html() File "C:\github\django_my_website\venv\lib\site-packages\django\views\debug.py", line 332, in get_traceback_html t = DEBUG_ENGINE.from_string(fh.read()) UnicodeDecodeError: 'cp949' codec can't decode byte 0xe2 in position 9735: illegal multibyte sequence During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 34, in inner response = get_response(request) File "C:\github\django_my_website\venv\lib\site-packages\django\utils\deprecation.py", line 94, in __call__ response = response or self.get_response(request) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 36, in inner response = response_for_exception(request, exc) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 90, in response_for_exception response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info()) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 125, in handle_uncaught_exception return debug.technical_500_response(request, *exc_info) File "C:\github\django_my_website\venv\lib\site-packages\django\views\debug.py", line 94, in technical_500_response html = reporter.get_traceback_html() File "C:\github\django_my_website\venv\lib\site-packages\django\views\debug.py", line 332, in get_traceback_html t = DEBUG_ENGINE.from_string(fh.read()) UnicodeDecodeError: 'cp949' codec can't decode byte 0xe2 in position 9735: illegal multibyte sequence During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 34, in inner response = get_response(request) File "C:\github\django_my_website\venv\lib\site-packages\django\utils\deprecation.py", line 94, in __call__ response = response or self.get_response(request) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 36, in inner response = response_for_exception(request, exc) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 90, in response_for_exception response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info()) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 125, in handle_uncaught_exception return debug.technical_500_response(request, *exc_info) File "C:\github\django_my_website\venv\lib\site-packages\django\views\debug.py", line 94, in technical_500_response html = reporter.get_traceback_html() File "C:\github\django_my_website\venv\lib\site-packages\django\views\debug.py", line 332, in get_traceback_html t = DEBUG_ENGINE.from_string(fh.read()) UnicodeDecodeError: 'cp949' codec can't decode byte 0xe2 in position 9735: illegal multibyte sequence During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 34, in inner response = get_response(request) File "C:\github\django_my_website\venv\lib\site-packages\django\utils\deprecation.py", line 94, in __call__ response = response or self.get_response(request) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 36, in inner response = response_for_exception(request, exc) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 90, in response_for_exception response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info()) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 125, in handle_uncaught_exception return debug.technical_500_response(request, *exc_info) File "C:\github\django_my_website\venv\lib\site-packages\django\views\debug.py", line 94, in technical_500_response html = reporter.get_traceback_html() File "C:\github\django_my_website\venv\lib\site-packages\django\views\debug.py", line 332, in get_traceback_html t = DEBUG_ENGINE.from_string(fh.read()) UnicodeDecodeError: 'cp949' codec can't decode byte 0xe2 in position 9735: illegal multibyte sequence During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 34, in inner response = get_response(request) File "C:\github\django_my_website\venv\lib\site-packages\django\utils\deprecation.py", line 94, in __call__ response = response or self.get_response(request) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 36, in inner response = response_for_exception(request, exc) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 90, in response_for_exception response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info()) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 125, in handle_uncaught_exception return debug.technical_500_response(request, *exc_info) File "C:\github\django_my_website\venv\lib\site-packages\django\views\debug.py", line 94, in technical_500_response html = reporter.get_traceback_html() File "C:\github\django_my_website\venv\lib\site-packages\django\views\debug.py", line 332, in get_traceback_html t = DEBUG_ENGINE.from_string(fh.read()) UnicodeDecodeError: 'cp949' codec can't decode byte 0xe2 in position 9735: illegal multibyte sequence During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 34, in inner response = get_response(request) File "C:\github\django_my_website\venv\lib\site-packages\django\utils\deprecation.py", line 94, in __call__ response = response or self.get_response(request) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 36, in inner response = response_for_exception(request, exc) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 90, in response_for_exception response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info()) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 125, in handle_uncaught_exception return debug.technical_500_response(request, *exc_info) File "C:\github\django_my_website\venv\lib\site-packages\django\views\debug.py", line 94, in technical_500_response html = reporter.get_traceback_html() File "C:\github\django_my_website\venv\lib\site-packages\django\views\debug.py", line 332, in get_traceback_html t = DEBUG_ENGINE.from_string(fh.read()) UnicodeDecodeError: 'cp949' codec can't decode byte 0xe2 in position 9735: illegal multibyte sequence During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 34, in inner response = get_response(request) File "C:\github\django_my_website\venv\lib\site-packages\django\utils\deprecation.py", line 94, in __call__ response = response or self.get_response(request) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 36, in inner response = response_for_exception(request, exc) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 90, in response_for_exception response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info()) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 125, in handle_uncaught_exception return debug.technical_500_response(request, *exc_info) File "C:\github\django_my_website\venv\lib\site-packages\django\views\debug.py", line 94, in technical_500_response html = reporter.get_traceback_html() File "C:\github\django_my_website\venv\lib\site-packages\django\views\debug.py", line 332, in get_traceback_html t = DEBUG_ENGINE.from_string(fh.read()) UnicodeDecodeError: 'cp949' codec can't decode byte 0xe2 in position 9735: illegal multibyte sequence During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\Users\Lee Ji Hyun\anaconda3\lib\wsgiref\handlers.py", line 137, in run self.result = application(self.environ, self.start_response) File "C:\github\django_my_website\venv\lib\site-packages\django\contrib\staticfiles\handlers.py", line 65, in __call__ return self.application(environ, start_response) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\wsgi.py", line 141, in __call__ response = self.get_response(request) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\base.py", line 75, in get_response response = self._middleware_chain(request) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 36, in inner response = response_for_exception(request, exc) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 90, in response_for_exception response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info()) File "C:\github\django_my_website\venv\lib\site-packages\django\core\handlers\exception.py", line 125, in handle_uncaught_exception return debug.technical_500_response(request, *exc_info) File "C:\github\django_my_website\venv\lib\site-packages\django\views\debug.py", line 94, in technical_500_response html = reporter.get_traceback_html() File "C:\github\django_my_website\venv\lib\site-packages\django\views\debug.py", line 332, in get_traceback_html t = DEBUG_ENGINE.from_string(fh.read()) UnicodeDecodeError: 'cp949' codec can't decode byte 0xe2 in position 9735: illegal multibyte sequence [19/Mar/2020 15:01:33] "GET /admin/blog/post/ HTTP/1.1" 500 59너무 길어서 멘붕이 되는데 무슨 소린지 모르겠어서 끝 줄 오류부분 UnicodeDecodeError: 'cp949' codec can't decode byte 0xe2 in position 9735: illegal multibyte sequence 이것만 검색해서 찾아봤더니debug.py 에서 비어있던 open method에서 encoding = "utf-8" 도 기입했고 span 은 고칠게 따로 없었고 그랬습니다..뭐가 잘못된 것일까요,,,ㅕ

입맛이 없거나 먹고나서 속이 별로라면 굳이 아침을 챙기지않아도 괜찮을까요? 강의 내용중에 체질에 따라서 아침이 필수는 아니라고한건지, 아침에 탄수화물이 필수가 아니라고한건지 헷깔려요 ㅠㅠ!

run 하면 이런에러가 뜨는데 어떻게해야하나요?

청구상세내용에 내용 입력하고 주문확정을 하니까 죄송합니다. 고객님의 주에 가능한 지불 방법이 없는 것 같습니다. 도움이나 다른 조정이 필요하시면 저희에게 연락해주세요. 위와 같은 내용으로 다음으로 진행이 안돼는데요..우커머스에서 결제하려면 다른 무언가가 더 필요한거요?

onsubmit이 작동 안하길래 찾아보니 onFinish로 바뀐거 같습니다.

다운로드가 너무 오래걸리는데 이게 정상인가요??

왜 함수에서 넣어야하는 변수가 2개인데 이중포인터가 아닌 그냥 포인터인지 모르겠습니다. int sum2d_3(int* ar, int row, int col) { int tot = 0; for (int r = 0; r < row; r++) for (int c = 0; c < col; c++) tot += *(ar + c + col * r); return tot; } 이 함수를 보면 row와 col 두개를 변수로 가지고있는데 이러면 2차원 배열이랑 비슷한 개념이므로 이중포인터로 해야하는거 아닌가요? 왜 단일 포인터로 하는지 모르겠습니다..

10-14강의해서 선생님꼐서 2차원에서 arr의 기본주소는 &arr[0][0]이 아닌 &arr[0]이라고 하셨는데 이번 강의에서는  int data[ROWS][COLS] = { {1,2,3,4}, {5,6,7,8}, {9,0,1,2} }; printf("%d\n", data[1][2]); int* ptr = &data[0][0]; 여기서 *ptr을 &data[0]이 아닌 왜 &data[0][0]이어야 하는지 모르겠습니다. ㅠ 둘다 주소를 출력했을 때 주소는 같은 주소인데 왜 다른지 이해가 되지 않습니다.

별찍기 강의중 반목문 for 과 관련되어 질문 드립니다. for ( var star = 1; star <= 5;  star++1){ console.log('*') } 반복문 끝을 star++1 로 변경해도 괜찮나요?  star++1 과 star+=1 은 무슨 차이인가요? 반복문 끝을 지정하는게 아직 개념이 안잡혀 혼란스럽습니다ㅠㅠ

출력은  Served at: /ServletMappingTest<p>Hello Servlet~</p> 이렇게 나와요.

6:08 쯤에 while (status==1)로 하는 반복문 질문입니다. status라는 변수가 scanf("%d",&num)이 되면서 정수형 변수인 num를 받아주는거까지는 이해가 가지만 왜 while(status==1)에서 숫자 '1'이 써진건지 이해가 가지않습니다. 혹시 True,False를 받아주는건가 싶어서 디버그를 할 때 q를 하면 종료가 되지만 다른 알파벳을 넣어도 종료가 되는건가 싶어서 다른 알파벳을 입력하니 반복문이 종료가 되더라고요. 만약 True, False가 맞는거라면 == 이 기호는 동등할 떄 쓰는걸로 알고있는데 status변수에 1을 입력해도 종료가 되지않는건 어떤 이유인지 궁금합니다. #include<stdio.h> int main() { int num, sum = 0; int status = 0; printf("Enter an interger (q to quit) : "); status = scanf("%d", &num); while (status == 1) { sum = sum + num; printf("Enter next integer (q to quit) : "); status = scanf("%d", &num); } printf("Sum=%d\n", sum); return 0; }

가상환경 처음 설정하고 pendulum이나 pytest를 설치하는데 자꾸  (p_study) D:\p_study\Scripts>pip install pendulum Traceback (most recent call last):   File "D:\Python\lib\runpy.py", line 193, in _run_module_as_main     return _run_code(code, main_globals, None,   File "D:\Python\lib\runpy.py", line 86, in _run_code     exec(code, run_globals)   File "D:\p_study\Scripts\pip.exe\__main__.py", line 5, in <module> ModuleNotFoundError: No module named 'pip' (p_study) D:\p_study\Scripts>pip list Traceback (most recent call last):   File "D:\Python\lib\runpy.py", line 193, in _run_module_as_main     return _run_code(code, main_globals, None,   File "D:\Python\lib\runpy.py", line 86, in _run_code     exec(code, run_globals)   File "D:\p_study\Scripts\pip.exe\__main__.py", line 5, in <module> ModuleNotFoundError: No module named 'pip' 같이 에러가 뜹니다. 혹시 어떻게 해결해야 할까요??

이전에 제가 오해할 수 있게 말씀드린것 같네요. ㅜㅜ 제가 요청드리고 싶은건 유튜브에 있는 보일러 플레이트 강의 ppt인데 가능할까요?

여기 선언부 4줄 모두에서 아래 에러가 계속 뜹니다 ㅠ React Hook "useState" is called in function "videoUploadPage" which is neither a React function component or a custom React Hook function  react-hooks/rules-of-hooks 구글링해서 찾아보는데 좀 어렵네요 ㅠㅠ

(사진)

.

ingress 실습 2-4) ingress 부분의 마지막 curl명령에 에러가 있습니다. curl 192.168.0.30:30431/ curl 192.168.0.30:30431/order curl 192.168.0.30:30431/customernginx 서비스를 확인해 보니, 아래와 같다."spec": { "ports": [ { "name": "http", "protocol": "TCP", "port": 80, "targetPort": 80, "nodePort": 30168 }, { "name": "https", "protocol": "TCP", "port": 443, "targetPort": 443, "nodePort": 31423 } ],이 명령에 변화가 있는 것인가요? kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/nginx-0.27.1/deploy/static/provider/baremetal/service-nodeport.yaml알려주세요.

or연산과 and연산에서 true / false를 출력할거같은 느낌인데 왜 변수의 값이 출력되도록 설계가 되어 있는지 궁금합니다.

FP를 보면 결국 기존의 데이터를 수정하지 않고 새로운 카피본을 만드는 것인데, 메모리의 낭비로 이어질 수 있어서 작은 데이터에서는 문제는 없으나 대용량 데이터에서는 문제가 될 것 같습니다. 강의를 들으면서 이 문제의 해결 방안에 대한 기대를했었는데 별다른 언급이 없었네요. 이제 실무에 적용하려고 검토 및 준비를 하다보니 대용량 데이터 핸들링에서 이슈가 분명히 나올것 같아서관련자료를 찾아보니 이러한 문제점을 해결하기 위해서 persistent data structure를 사용하는것 같은데, 알려주신 FP와는 어떻게 접목시켜야 하는지요...? (결국 immutable.js 와 같은 오픈소스를 사용해야 하는지요...) 그동안 강의를 들으며 공부한 내용을 실제로 활용하기 위해서(올려주신 3개의 강의 모두 듣고 현재도 계속 반복중입니다) persistent data structure 와 FP에 대한 활용, 또는 persistent data structure가 아니더라도 FP에서 대용량 데이터를 다루는 방법에 대한 강의 또는 설명이 반드시 있어야 될 것 같습니다. 이야기가 약간 벗어난것 같은데...질문의 요점은 - FP로 대용량 데이터 핸들링시에 어떻게 처리를 해야하는것이 효율적인지에 대한 질문입니다.  끝으로 좋은 강의 감사합니다

계속 다음과 같이 오류가 뜹니다.