在 Python Django 中启用调试时，如何仅关闭 SqlAlchemy 数据库池的日志记录？
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【中文标题】在 Python Django 中启用调试时，如何仅关闭 SqlAlchemy 数据库池的日志记录？【英文标题】：How to turn off logging for SqlAlchemy db pool only, when debugging is enabled in Python Django? 【发布时间】：2021-06-20 23:09:15 【问题描述】：上下文/环境
我有一个 Python Django 项目使用 SqlAlchemy django-postgrespool2 数据库池连接到 PostgreSQL 数据库。
我正在努力实现的目标
在settings.py 中，我设置了DEBUG = True，它将生成程序日志。但是，我只想禁用来自 SqlAlchemy 数据库池的日志记录，同时将 DEBUG 设置为 True。换句话说，在调试时，我想查看除来自 SqlAlchemy 数据库池的日志之外的所有日志。
我测试过的内容
下面的代码显示了我为禁用数据库池日志所做的不同尝试：
def turnOffLog(self):
# --- Attempt 1, db pool logs still show ---
logging.basicConfig()
logging.getLogger('sqlalchemy').setLevel(logging.ERROR)
# --- Attempt 2, db pool logs still show ---
sqla_logger = logging.getLogger('sqlalchemy.engine.base.Engine')
for hdlr in sqla_logger.handlers:
sqla_logger.removeHandler(hdlr)
我还在创建 QueuePool 实例时将 echo=False 传递给它，它仍然不会删除日志：
dbPool = pool.QueuePool(dbConnection, max_overflow=dbConfig.poolMaxOverflow, pool_size=dbConfig.poolSize, recycle=dbConfig.poolRecycleTime, pre_ping=dbConfig.prePing, dialect=postgresql.dialect(), echo=False)
我的settings.py 文件（在 env-config 文件中将 DEBUG 设置为 True）：
"""
myapp
"""
import os
import logging
import socket
import sys
from decouple import Config, RepositoryEnv
import time
# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
# DECOUPLE
# env_config = Config(RepositoryEnv(BASE_DIR.replace('myapp-gui','')+'.env'))
env_config = Config(RepositoryEnv("c:\\Users\\myteam\\Documents\\django\\ATT49882.env"))
print('Using database: \x1b[97m[\033[92m '+env_config.get('DB_NAME')+' \x1b[97m]\033[0m');
print('Using database host: \x1b[97m[\033[92m '+env_config.get('DB_HOST')+' \x1b[97m]\033[0m');
print('Using database port: \x1b[97m[\033[92m '+env_config.get('DB_PORT')+' \x1b[97m]\033[0m');
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/2.1/howto/deployment/checklist/
# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = env_config.get('SECRET_KEY')
# SECURITY WARNING: don't run with debug turned on in production!
# OLD DEBUG = bool(env_config.get('DEBUG'))
try:
DEBUG = bool(int(env_config.get('DEBUG')))
except Exception as err:
DEBUG = True
# LOGLEVEL
if DEBUG:
LOGLEVEL = "DEBUG"
else:
LOGLEVEL = "INFO"
ALLOWED_HOSTS = ['*']
# myapp version
if DEBUG:
myapp_VERSION = time.time()
else:
myapp_VERSION = 2.0
# myapp constants
myapp_CONSTANTS =
'myapp_VERSION': myapp_VERSION
# Application definition
INSTALLED_APPS = [
...
]
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'whitenoise.middleware.WhiteNoiseMiddleware',
'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',
'core.mrank-middleware.MrankMiddleware',
'core.context_processor.LoginRequiredMiddleware',
]
LOGIN_URL = '/login/'
LOGIN_EXEMPT_URLS = []
REQUEST_WHITELIST_IP = ['127.0.0.1']
ROOT_URLCONF = 'myapp.urls'
CSRF_FAILURE_VIEW = 'core.views.csrf_failure'
# Setting for searching for html files in all templates folders, even in subfolders
TEMPLATE_LOADERS = (
'django.template.loaders.filesystem.Loader',
'django.template.loaders.app_directories.Loader',
)
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',
'core.context_processor.serverconfig',
'core.context_processor.phraseconfig',
'core.context_processor.myapp_constants'
],
,
,
]
WSGI_APPLICATION = 'myapp.wsgi.application'
# Database
# https://docs.djangoproject.com/en/2.1/ref/settings/#databases
# FOR DEVELOPMENT :-)
try:
hostname = socket.gethostname()
except:
hostname = ''
# bool(int(env_config.get('DEBUG')))
DATABASES =
'default':
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': env_config.get('DB_NAME'),
'OPTIONS':
'options': '-c search_path=myappdjango'
,
'USER': env_config.get('DB_USER'),
'PASSWORD': env_config.get('DB_PASSWORD'),
'HOST': env_config.get('DB_HOST'), # Or an IP Address that your DB is hosted on
'PORT': env_config.get('DB_PORT')
,
'pool':
'ENGINE': 'django_postgrespool2',
'NAME': env_config.get('DB_NAME'),
'OPTIONS':
'options': '-c search_path=myappdjango'
,
'USER': env_config.get('DB_USER'),
'PASSWORD': env_config.get('DB_PASSWORD'),
'HOST': env_config.get('DB_HOST'),
'PORT': env_config.get('DB_PORT'),
'POOL_SIZE': int(env_config.get('DB_POOL_SIZE', 100)),
'POOL_MAX_OVERFLOW': int(env_config.get('DB_POOL_MAX_OVERFLOW', 100)),
'POOL_RECYCLE_TIME': int(env_config.get('DB_POOL_RECYCLE_TIME', 3600)),
"PRE_PING": bool(int(env_config.get('DB_POOL_PRE_PING', 0)))
# Password validation
# https://docs.djangoproject.com/en/2.1/ref/settings/#auth-password-validators
AUTH_PASSWORD_VALIDATORS = [
...
]
# Internationalization
# https://docs.djangoproject.com/en/2.1/topics/i18n/
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True
# Static files (CSS, javascript, Images)
# https://docs.djangoproject.com/en/2.1/howto/static-files/
STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage'
STATIC_URL = '/static/'
STATIC_ROOT = os.path.join(BASE_DIR, 'staticfiles')
# Upload directory
MEDIA_URL = '/upload/'
MEDIA_ROOT = os.path.join(BASE_DIR, 'upload')
# Custom settings
TIME = 60*60*60*60
SESSION_COOKIE_AGE = TIME
SESSION_IDLE_TIMEOUT = TIME
SESSION_EXPIRE_AT_BROWSER_CLOSE = True
LOGGING =
'version': 1,
'disable_existing_loggers': False,
'formatters':
'default':
'format': '%(asctime)s:%(levelname)s:%(name)s: %(message)s',
'datefmt': '%Y-%m-%d %H:%M:%S'
,
'handlers':
'console':
'class': 'logging.StreamHandler',
'formatter': 'default',
'stream': sys.stdout
,
,
'root':
'handlers': ['console'],
'level': LOGLEVEL,
,
数据库池日志示例
只是我要删除的日志外观示例：
2021-03-24 09:38:00:DEBUG:z.pool: new connection
2021-03-24 09:38:00:DEBUG:z.pool: retrieved from pool
2021-03-24 09:38:00:DEBUG:z.pool: returned to pool
谢谢！
更新 #0
我也试过了，但它仍然没有删除数据库池日志：
logging.basicConfig()
logging.getLogger('sqlalchemy').disable = True
【问题讨论】：
您是否也尝试过sqlalchemy.pool 作为记录器名称？
【参考方案1】：
通过设置 engine.echo = False where engine = create_engine()
解决了这个问题似乎 sqlalchemy 创建了自己的日志输出：
请务必注意，这两个标志独立于任何现有的日志记录配置工作，并且将无条件地使用 logging.basicConfig()。除了任何现有的记录器配置之外，这还具有配置的效果。因此，在显式配置日志记录时，请确保所有回显标志始终设置为 False，以避免出现重复的日志行。
您应该将 engine.echo 和/或 engine.echo_pool 设置为 False (engine = create_engine())。
在我的情况下（几乎与这个相同）engine.echo = False 解决了问题，并且未找到 engine.echo_pool。
这里有更多描述：https://docs.sqlalchemy.org/en/14/core/engines.html#more-on-the-echo-flag
【讨论】：
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