Django - 禁用系统检查之一答案

【问题标题】：Django - disable one of system checksDjango - 禁用系统检查之一
【发布时间】：2017-08-27 22:23:01
【问题描述】：

是否可以只永久禁用一个（不是全部）系统检查（例如 E301）？是否可以更改项目 settings.py 以跳过对所有 ./manage.py 命令的系统检查？

【问题讨论】：

【解决方案1】：

是的，您可以使用 SILENCED_SYSTEM_CHECKS 来使特定检查静音，例如

settings.py

SILENCED_SYSTEM_CHECKS = ["models.W001"]

【讨论】：

【解决方案2】：

要仅在某些条件下禁用检查（或多次检查），您可以创建一个设置常量，在这种情况下，我从环境变量中获取信息：

# Disable checks, i.e. for build process
DISABLE_CHECKS = os.getenv('DISABLE_CHECKS') in ('1', 1, True)
if DISABLE_CHECKS:
    SILENCED_SYSTEM_CHECKS = ['content_services.E001', 'content_services.E002']

检查的名称是您在错误消息中指定的id。这是一个示例检查：

def check_cache_connectivity(app_configs, **kwargs):
    """
    Check cache
    :param app_configs:
    :param kwargs:
    :return:
    """
    errors = []

    cache_settings = settings.CACHES.keys()
    for cur_cache in cache_settings:
        try:
            key = 'check_cache_connectivity_{}'.format(cur_cache)
            caches[cur_cache].set(key, 'connectivity_ok', 30)
            value = caches[cur_cache].get(key)
            print("Cache '{}' connection ok, key '{}', value '{}'".format(cur_cache, key, value))
        except Exception as e:
            msg = "ERROR: Cache {} looks to be down. {}".format(cur_cache, e)
            print(msg)
            logging.exception(msg)
            errors.append(
                Error(
                    msg,
                    hint='Unable to connect to cache {}. {}'.format(cur_cache, e),
                    obj='CACHES.{}'.format(cur_cache),
                    id='content_services.E002',
                )
            )
    return errors

我启动这些检查的方式是在我的apps.py 中针对特定应用程序，即：

from django.apps import AppConfig
from django.core import checks
from common_checks import check_db_connectivity
from common_checks import check_cache_connectivity


class ContentAppConfig(AppConfig):
    name = 'content_app'

    def ready(self):
        super(ContentAppConfig, self).ready()
        checks.register(checks.Tags.compatibility)(check_cache_connectivity)

在我的应用程序__init__.py 中，我还设置了默认应用程序配置：

default_app_config = 'content_app.apps.ContentAppConfig'

希望对你有帮助！

更新：无论SILENCED_SYSTEM_CHECKS 值如何，一些manage.py 命令都会运行检查。为此，我有一个特殊的解决方法：

def check_cache_connectivity(app_configs, **kwargs):
    """
    Check cache
    :param app_configs:
    :param kwargs:
    :return:
    """
    errors = []

    # Short circuit here, checks still ran by manage.py cmds regardless of SILENCED_SYSTEM_CHECKS
    if settings.DISABLE_CHECKS:
        return errors

    cache_settings = settings.CACHES.keys()
    for cur_cache in cache_settings:
        try:
            key = 'check_cache_connectivity_{}'.format(cur_cache)
            caches[cur_cache].set(key, 'connectivity_ok', 30)
            value = caches[cur_cache].get(key)
            print("Cache '{}' connection ok, key '{}', value '{}'".format(cur_cache, key, value))
        except Exception as e:
            msg = "ERROR: Cache {} looks to be down. {}".format(cur_cache, e)
            print(msg)
            logging.exception(msg)
            errors.append(
                Error(
                    msg,
                    hint="Unable to connect to cache {}, set as {}. {}"
                         "".format(cur_cache, settings.CACHES[cur_cache], e),
                    obj='CACHES.{}'.format(cur_cache),
                    id='content_services.E002',
                )
            )
    return errors

【讨论】：