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迁移报错

# python manage.py makemigrations
SystemCheckError: System check identified some issues:
ERRORS:
?: (urls.E007) The custom handler403 view 'StarMeow.urls.permission_denied' does not take the correct number of arguments (request, exception).
?: (urls.E007) The custom handler404 view 'StarMeow.urls.page_not_found' does not take the correct number of arguments (request, exception).


Django2.1版本在2.2版本上也没发生大变化

# django/views/defaults.py
from django.http import (
HttpResponseBadRequest, HttpResponseForbidden, HttpResponseNotFound,
HttpResponseServerError,
)
from django.template import Context, Engine, TemplateDoesNotExist, loader
from django.views.decorators.csrf import requires_csrf_token
ERROR_404_TEMPLATE_NAME = '404.html'
ERROR_403_TEMPLATE_NAME = '403.html'
ERROR_400_TEMPLATE_NAME = '400.html'
ERROR_500_TEMPLATE_NAME = '500.html'
# This can be called when CsrfViewMiddleware.process_view has not run,
# therefore need @requires_csrf_token in case the template needs
# {% csrf_token %}.
@requires_csrf_token
def page_not_found(request, exception, template_name=ERROR_404_TEMPLATE_NAME):
"""
Default 404 handler.
Templates: :template:`404.html`
Context:
request_path
The path of the requested URL (e.g., '/app/pages/bad_page/')
exception
The message from the exception which triggered the 404 (if one was
supplied), or the exception class name
"""
exception_repr = exception.__class__.__name__
# Try to get an "interesting" exception message, if any (and not the ugly
# Resolver404 dictionary)
try:
message = exception.args[0]
except (AttributeError, IndexError):
pass
else:
if isinstance(message, str):
exception_repr = message
cOntext= {
'request_path': request.path,
'exception': exception_repr,
}
try:
template = loader.get_template(template_name)
body = template.render(context, request)
content_type = None # Django will use DEFAULT_CONTENT_TYPE
except TemplateDoesNotExist:
if template_name != ERROR_404_TEMPLATE_NAME:
# Reraise if it's a missing custom template.
raise
template = Engine().from_string(
'

Not Found

# django/conf/urls/__init__.py
from django.urls import include, re_path
from django.views import defaults
__all__ = ['handler400', 'handler403', 'handler404', 'handler500', 'include', 'url']
handler400 = defaults.bad_request
handler403 = defaults.permission_denied
handler404 = defaults.page_not_found
handler500 = defaults.server_error
def url(regex, view, kwargs=None, name=None):
return re_path(regex, view, kwargs, name)


确认问题，检查是全局403、404的问题

少了一个exception参数，意思是

来自异常的消息，该异常触发404(如果有的话)或异常类名

# 全局403、404、500错误自定义页面显示
def page_not_found(request, exception=404):
return render(request, '404.html')
def page_error(request):
return render(request, '500.html')
def permission_denied(request, exception=403):
return render(request, '403.html')
# 定义错误跳转页面
handler403 = permission_denied
handler404 = page_not_found
handler500 = page_error


但上一个版本就是正常的，那，我也不知道了~