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AliSayyah/django-urlconfchecks: A package for type-checking the URLs and associated views for Django

django-urlconfchecks is a static type checker that checks your URLconf parameter types with argument types specified in associated views. It leverages the Django's static check system.

• Documentation
• GitHub
• PyPI

pip install django-urlconfchecks

Python 3.8 or later is required. However, before Python 3.10 some checks relating to Optional types in view signatures are skipped due to stdlib limitations.

You can use this package in different ways:

Add django_urlconfchecks to your INSTALLED_APPS list in your settings.py file.

    INSTALLED_APPS = [
    ...
    'django_urlconfchecks',
]

Run this command from the root of your project, were manage.py is located:

$ urlconfchecks --help

    Usage: urlconfchecks [OPTIONS]

      Check all URLConfs for errors.

    Options:
      --version
      -u, --urlconf PATH    Specify the URLconf to check.
      --install-completion  Install completion for the current shell.
      --show-completion     Show completion for the current shell, to copy it or
                            customize the installation.
      --help                Show this message and exit.

Add the following to your .pre-commit-config.yaml file:

  - repo: https://github.com/AliSayyah/django-urlconfchecks
    rev: v0.11.0
    hooks:
      - id: django-urlconfchecks

For more information, see the usage documentation.

Using this package, URL pattern types will automatically be matched with associated views, and in case of mismatch, an error will be raised.

Example:

# urls.py
from django.urls import path

from . import views

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

# views.py

def year_archive(request, year: int):
    pass


def month_archive(request, year: int, month: int):
    pass


def article_detail(request, year: int, month: int, slug: str):
    pass

output will be:

(urlchecker.E002) For parameter `year`, annotated type int does not match expected `str` from urlconf

• TODO:
  • Handle type checking parameterized generics e.g. typing.List[int], list[str] etc.
  • Should only warn for each unhandled Converter once.
  • Regex patterns perhaps? (only RoutePattern supported at the moment).

• Luke Plant for providing the idea and the initial code.
• This package was created with Cookiecutter and the waynerv/cookiecutter-pypackage project template.

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