python runtime_error ai_generated true

django.urls.exceptions.NoReverseMatch: Reverse for 'product_detail' with arguments '('',)' not found. 1 pattern(s) tried: ['product/<int:pk>/']

ID: python/django-url-reverse-with-args

Also available as: JSON · Markdown · 中文
80%Fix Rate
86%Confidence
0Evidence
2024-11-05First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

Passing an empty string or non-integer argument to reverse() for a URL pattern expecting int.

generic

中文

向期望整数的 URL 模式传递空字符串或非整数参数。

Workarounds

  1. 90% success 
    Ensure argument is integer: reverse('product_detail', args=[int(pk)])
  2. 85% success 
    Provide default: reverse('product_detail', args=[pk or 0])

Dead Ends

Common approaches that don't work:

  1. 70% fail

    Using reverse('product_detail', args=[None]) doesn't convert None to int, still fails.

  2. 50% fail

    Changing URL pattern to string doesn't fix if you pass None.