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22 / 30Django Views and URL RoutingHardPython - Django Framework

Identifying the Bug in Django URL Pattern Matching

# urls.py
from django.urls import path
from . import views

urlpatterns = [
    path('articles/<int:year>/<int:month>/', views.article_list),
    path('articles/<str:slug>/', views.article_detail),
]

  1. The first pattern will always match before the second, so a URL like 'articles/my-article/' will never reach the second pattern and will return a 404 error.

  2. Both patterns will work correctly because Django automatically determines which pattern to use based on the data type of the URL segment.

  3. The string pattern will take precedence because string patterns are more specific than integer patterns.

  4. Django will raise an error during server startup because two path() functions cannot target the same prefix.

Show answer & explanation

Correct answer

The first pattern will always match before the second, so a URL like 'articles/my-article/' will never reach the second pattern and will return a 404 error.

Explanation

Django matches URL patterns in order; the integer pattern matches before the string pattern, so articles/2024/01/ works but articles/my-article/ fails because 'my-article' cannot match <int:month> in the first pattern.

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All 30 Django Views and URL Routing questions

  1. 1.What is the primary purpose of URL routing in Django?
  2. 2.Which file in a Django project is responsible for defining URL patterns?
  3. 3.What is a Django view?
  4. 4.What is the difference between a function-based view and a class-based view in Django?
  5. 5.What does the `path()` function do in Django's urls.py?
  6. 6.What is the purpose of URL parameters in Django routing?
  7. 7.What does `HttpResponse` represent in Django views?
  8. 8.What is the role of `include()` in Django URL routing?
  9. 9.What is the purpose of the `name` parameter in Django's `path()` function?
  10. 10.What does `render()` function do in Django views?
  11. 11.Understanding Django URL Routing with Path Converters
  12. 12.Scenario:
  13. 13.Identifying the Correct URL Pattern Syntax
  14. 14.Understanding Django View Function Parameters
  15. 15.Scenario:
  16. 16.Identifying View Type and Response Method
  17. 17.Understanding Reverse URL Lookup
  18. 18.Scenario:
  19. 19.Understanding Regular Expression Patterns in URLs
  20. 20.Scenario:
  21. 21.Understanding Django URL Routing with Include and Namespace
  22. 22.Identifying the Bug in Django URL Pattern Matching
  23. 23.Scenario:
  24. 24.Analyzing Django View and URL Mapping
  25. 25.Scenario:
  26. 26.Understanding Class-Based Views with URL Routing
  27. 27.Finding the Output:
  28. 28.Scenario:
  29. 29.Identifying URL Pattern Issues with Regex Converters
  30. 30.Scenario: