인프런 커뮤니티 질문&답변

코드 받아서 돌려봤는데 잘 돌아가네요..어디선가 코드를 잘못 썻나봐요 감사합니다!

#!/usr/bin/env python
"""Django's command-line utility for administrative tasks."""
import os
import sys


def main():
    """Run administrative tasks."""
    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'mysite.settings')
    try:
        from django.core.management import execute_from_command_line
    except ImportError as exc:
        raise ImportError(
            "Couldn't import Django. Are you sure it's installed and "
            "available on your PYTHONPATH environment variable? Did you "
            "forget to activate a virtual environment?"
        ) from exc
    execute_from_command_line(sys.argv)


if __name__ == '__main__':
    main()

manage.py에 경로설정돼있습니다.

layers값은 정상적으로 출력됩니다.

~/Documents/GitHub/Quickie test-chat !3 > python3 run_test_hello_channel.py                                                                                                              4s py Quickie 13:59:04
{‘default’: {‘BACKEND’: ‘channels_redis.core.RedisChannelLayer’, ‘CONfIG’: {‘hosts’: [{‘host’: ‘redis-11279.c54.ap-northeast-1-2.ec2.cloud.redislabs.com’, ‘port’: 11279, ‘password’: ‘lRiJKj6xSMpubVvQ2QLNeft05INxmItmv’}]}}}
RedisChannelLayer(hosts=[{‘address’: ‘redis://localhost:6379’}])
Traceback (most recent call last):
  File “/Users/kang-yongmin/Documents/GitHub/Quickie/venv/lib/python3.10/site-packages/redis/asyncio/connection.py”, line 567, in connect
    await self.retry.call_with_retry(
  File “/Users/kang-yongmin/Documents/GitHub/Quickie/venv/lib/python3.10/site-packages/redis/asyncio/retry.py”, line 59, in call_with_retry
    return await do()
  File “/Users/kang-yongmin/Documents/GitHub/Quickie/venv/lib/python3.10/site-packages/redis/asyncio/connection.py”, line 604, in _connect
    reader, writer = await asyncio.open_connection(
  File “/Users/kang-yongmin/.pyenv/versions/3.10.4/lib/python3.10/asyncio/streams.py”, line 47, in open_connection
    transport, _ = await loop.create_connection(
  File “/Users/kang-yongmin/.pyenv/versions/3.10.4/lib/python3.10/asyncio/base_events.py”, line 1072, in create_connection
    raise OSError(‘Multiple exceptions: {}‘.format(
OSError: Multiple exceptions: [Errno 61] Connect call failed (‘::1’, 6379, 0, 0), [Errno 61] Connect call failed (‘127.0.0.1’, 6379)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File “/Users/kang-yongmin/Documents/GitHub/Quickie/run_test_hello_channel.py”, line 25, in <module>
    asyncio.run(main())
  File “/Users/kang-yongmin/.pyenv/versions/3.10.4/lib/python3.10/asyncio/runners.py”, line 44, in run
    return loop.run_until_complete(main)
  File “/Users/kang-yongmin/.pyenv/versions/3.10.4/lib/python3.10/asyncio/base_events.py”, line 646, in run_until_complete
    return future.result()
  File “/Users/kang-yongmin/Documents/GitHub/Quickie/run_test_hello_channel.py”, line 19, in main
    await channel_layer.send(‘hello’, message_dict)
  File “/Users/kang-yongmin/Documents/GitHub/Quickie/venv/lib/python3.10/site-packages/channels_redis/core.py”, line 218, in send
    await connection.zremrangebyscore(
  File “/Users/kang-yongmin/Documents/GitHub/Quickie/venv/lib/python3.10/site-packages/redis/asyncio/client.py”, line 502, in execute_command
    conn = self.connection or await pool.get_connection(command_name, **options)
  File “/Users/kang-yongmin/Documents/GitHub/Quickie/venv/lib/python3.10/site-packages/redis/asyncio/connection.py”, line 1363, in get_connection
    await connection.connect()
  File “/Users/kang-yongmin/Documents/GitHub/Quickie/venv/lib/python3.10/site-packages/redis/asyncio/connection.py”, line 575, in connect
    raise ConnectionError(self._error_message(e))
redis.exceptions.ConnectionError: Error connecting to localhost:6379. Multiple exceptions: [Errno 61] Connect call failed (‘::1’, 6379, 0, 0), [Errno 61] Connect call failed (‘127.0.0.1’, 6379).

redislabs의 서버를 사용하려하고 있습니다.

settings.py

"""
Django settings for mysite project.

Generated by 'django-admin startproject' using Django 4.1.5.

For more information on this file, see
https://docs.djangoproject.com/en/4.1/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/4.1/ref/settings/
"""

from pathlib import Path

from environ import Env

# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent

env = Env()
env_path = BASE_DIR / ".env"
if env_path.exists():
    with env_path.open(encoding="utf8") as f:
        env.read_env(f, overwrite=True)

# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/4.1/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'django-insecure-zlx#3$sp$wca%lnq2k4)6@lz+8aak(n!buko-%(o8=__!ht=5o'

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = []


# Application definition

INSTALLED_APPS = [
    'channels',
    'daphne',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'app',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

ROOT_URLCONF = 'mysite.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'mysite.wsgi.application'
ASGI_APPLICATION = 'mysite.asgi.application'

# Database
# https://docs.djangoproject.com/en/4.1/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': BASE_DIR / 'db.sqlite3',
    }
}

#django channels layer
if "CHANNEL_LAYER_REDIS_URL" in env:
    channel_layer_redis = env.db_url("CHANNEL_LAYER_REDIS_URL")
    CHANNEL_LAYERS = {
        "default" : {
            "BACKEND": "channels_redis.core.RedisChannelLayer",
            "CONfIG": {
                "hosts": [
                    {
                        "host": channel_layer_redis["HOST"],
                        "port": channel_layer_redis.get("PORT") or 6379,
                        "password": channel_layer_redis["PASSWORD"],
                    }
                ]
            }
        }
    }

# Password validation
# https://docs.djangoproject.com/en/4.1/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]


# Internationalization
# https://docs.djangoproject.com/en/4.1/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/4.1/howto/static-files/

STATIC_URL = 'static/'

# Default primary key field type
# https://docs.djangoproject.com/en/4.1/ref/settings/#default-auto-field

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

.env

CHANNEL_LAYER_REDIS_URL=redis://:lRiJKj6xSMpubVvQ2QLNft05INxmItmv@redis-11279.c54.ap-northeast-1-2.ec2.cloud.redislabs.com:11279

쉘에서는 다음과 같이 잘 작동하고 있습니다.

~/Documents/GitHub/Quickie test-chat !3 > python3 manage.py shell                                                                                                                       37s py Quickie 13:41:59
Python 3.10.4 (main, Jan  3 2023, 21:09:20) [Clang 14.0.0 (clang-1400.0.29.202)] on darwin
Type “help”, “copyright”, “credits” or “license” for more information.
(InteractiveConsole)
>>> from django.conf import settings
>>> print(settings.CHANNEL_LAYERS)
{‘default’: {‘BACKEND’: ‘channels_redis.core.RedisChannelLayer’, ‘CONfIG’: {‘hosts’: [{‘host’: ‘redis-11279.c54.ap-northeast-1-2.ec2.cloud.redislabs.com’, ‘port’: 11279, ‘password’: ‘lRiJKj6xSMpubVvQ2QLNft05INxmItmv’}]}}}
>>> exit()

안녕하세요.

run_test_helllo_channle.py 실습은 레디스가 구동 중 인지, settings.py의 레디스 설정이 현 장고 프로젝트에 제대로 적용되어있는 지 확인하는 과정입니다.

레디스 서버는 redislabs 의 서버를 쓸려고 하시는 것인가요? 아니면 로컬에 레디스 서버를 설치하셨나요?

보여주신 오류 마지막에 아래의 메세지가 있습니다. localhost:6379 로 접속을 시도했는 데 접속에 실패했다고 합니다. 장고 프로젝트에서는 로컬의 레디스 서버에 접속 시도를 했네요. 만약 redislabs를 쓸려고 하셨다면 환경변수 적용이 안 되었거나, settings.py 에서 수정된 코드파일이 저장이 안 되었을 수도 있습니다.

redis.exceptions.ConnectionError: Error connecting to localhost:6379. Multiple exceptions: [Errno 61] Connect call failed (‘::1’, 6379, 0, 0), [Errno 61] Connect call failed (‘127.0.0.1’, 6379).

차근 차근 확인해보시구요.

settings.py 에 적용하신 내역과 .env 내역, 그리고 어떤 레디스 서버를 사용하시는 지 알려주시겠어요?

그리고 python manage.py shell 명령으로 장고 쉘을 구동하신 후에, 아래 코드 수행 결과도 알려주시겠어요?

from django.conf import settings
print(settings.CHANNEL_LAYERS)

해결방법은 멀리 있지 않습니다.

차근차근 화이팅입니다. :-)