django-ty 0.1.0

Django semantic extension for ty-extended.

django-ty

django-ty adds Django ORM semantics to ty-extended. It installs Django, the checker runtime, and a packaged Django static API for Django 5.0-6.0.

Install

uv add django-ty

Installed plugin discovery is deliberately opt-in. Add this to the project configuration:

[tool.ty.plugins]
auto-discover = true

Then run:

uv run ty check .

No installer command, .ty directory, or file copy is needed.

Coverage

The complete pinned static API is packaged inside the wheel. No upstream django-stubs, django-stubs-ext, or mypy-plugin distribution is installed. Utilities supplied by django-stubs-ext, including WithAnnotations, are intentionally outside django-ty's product surface. django-ty handles Django model fields, forward and reverse relations, model-specific managers, queryset result types, values(), values_list(), basic annotate(), and literal lookup validation.

The measured feature parity is 100.0% against pinned mypy 2.1.0 with django-stubs 6.0.6: all 82 of 82 in-scope reference outcomes match. The exact behavior is in the compatibility map. It is generated by running both checkers against the same 82 assertions and is reproduced in CI. Hand-assigned statuses and weights are not used.

Development

uv run --no-project --python 3.11 python scripts/evaluate_django_stubs_coverage.py --check
uv run --no-project --python 3.11 python -m unittest tests/test_compatibility_value.py tests/test_evaluate_differential_conformance.py
bash scripts/differential-conformance.sh --check
cargo test --locked
cargo llvm-cov --locked --all-targets --summary-only --fail-under-lines 98
bash scripts/e2e.sh

To refresh the vendored static API from the reviewed pinned checkout:

uv run --no-project --python 3.11 python scripts/vendor_django_static_api.py --upstream-root /path/to/django-stubs-6.0.6
bash scripts/differential-conformance.sh --write
uv run --no-project --python 3.11 python scripts/evaluate_django_stubs_coverage.py --write --check