Django has Resolver404({\'tried\': tried, \'path\': new_path}) error. What's going on?

Cause of error

This is usually caused by the URL pattern defined in Django failing to match the requested URL. For example, if a URL pattern is defined in DjanGo's URLconf, but the URL you are trying to access does not match the pattern, a Resolver404 error will occur.

A workaround could be to ensure that the URL patterns are correctly defined in the URLconf and that the requested URL matches those patterns. You can also use Django's log feature to view a list of URL patterns that were attempted to match to help debug the problem.

How to resolve

To resolve the Resolver404 error, you need to perform the following steps:

Make sure the URL pattern is correctly defined in Django's URLconf. Make sure that every URL pattern has a corresponding view function, and make sure that every view function has a corresponding URL pattern.

Ensure that the requested URL matches the URL pattern defined in the URLconf. If the requested URL does not match any of the defined URL patterns, a Resolver404 error occurs.

Use Django's logging functionality to see a list of URL patterns that were attempted to match. This can help you identify URLs where the URL pattern fails to match the request, helping you debug the problem.

Check your code to make sure there are no typos or other errors. If you find errors, fix them.

If you still can't solve the problem, you can try asking for help in the Django forum or other online communities.

Usage Example

The following is an example where two URL patterns are defined in the URLconf, but the requested URL does not match one of the patterns, resulting in a Resolver404 error:

# URLconf

from django.conf.urls import url

from . import views

urlpatterns = [
url(r'^articles/2003/$', views.special_case_2003),
url(r'^articles/(?P[0-9]{4})/$', views.year_arcHive),
]

# views.py

def special_case_2003(request):
return HttpResponse('2003')

def year_archive(request, year):
return HttpResponse(year)

# 请求的 URL

http://example.com/articles/2005/

In this case, Django will try to match the requested URL, but will only match the second URL pattern because it is the last one defined. Django returns a Resolver404 error because the requested URL does not match the first URL pattern.

To solve this problem, you can change the first URL pattern to match the requested URL, or add a view function in views.py to handle the requested URL.

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