python config_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-args-error

Also available as: JSON · Markdown · 中文
80%Fix Rate
86%Confidence
0Evidence
2024-12-03First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

Passing an empty string or non-integer as the primary key when using reverse() or {% url %} tag.

generic

中文

在使用reverse()或{% url %}标签时传递空字符串或非整数作为主键。

Workarounds

  1. 95% success 
    Check that pk is not None and is an integer: if pk: url = reverse('product-detail', args=[pk])
  2. 90% success 
    Use get_object_or_404 to ensure object exists before reversing.

Dead Ends

Common approaches that don't work:

  1. 80% fail

    If pk is empty, it still fails; need to ensure pk is valid integer.

  2. 70% fail

    Hides the error and may lead to broken links.