Files
Aegis/backend/app/database.py
T
kitos 394d5d9056 refactor(types): add comprehensive type annotations across backend Python codebase
Enable ANN rules in ruff.toml (flake8-annotations) and resolve all 221 violations:

ANN201/ANN202 — return types on 168 public/private functions:
- All 28 FastAPI routers: endpoints annotated with dict/list/specific schema/
  StreamingResponse/FileResponse/JSONResponse as appropriate
- main.py: lifespan→AsyncGenerator[None,None], exception handlers→JSONResponse
- database.py: get_db→Generator[Session,None,None], proxy methods→correct types
- middleware/request_context.py: dispatch→Response with Callable call_next type

ANN001/ANN002/ANN003 — 32 missing argument types:
- seed_demo.py: all db parameters typed as Session
- domain/unit_of_work.py: __aexit__ exc_type/exc_val/exc_tb typed with TracebackType
- services: audit_service user_id→UUID|None, heatmap_service query/model/builder,
  notification_service test→Test, tempo_service test→Test/user→User,
  test_workflow_service test_id→UUID, campaign_crud **fields→object,
  test_crud **fields→object (4 sites)

ANN401 — 16 Any usages resolved:
- Domain entities (campaign/technique/threat_actor/test_entity): replaced Any with
  actual ORM types via TYPE_CHECKING guards to avoid circular imports
- detection_rule_service: test_id/detection_rule_id/evaluator_id→UUID
- score_cache: kept Any with # noqa: ANN401 (genuinely generic cache)
- jira_service/tempo_service: kept Any with # noqa: ANN401 (lazy optional deps)
- d3fend_import_service: _to_str(v: Any) kept with # noqa: ANN401

ANN204/ANN205/ANN206 — special/static/class methods:
- database.py proxy __call__/__getattr__: *args: object/**kwargs: object
- schemas/test.py model_validate: obj→object, **kwargs→object
- sa_technique_repository._int_type→type

All 439 unit tests pass. ruff check app/ → All checks passed!

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-06-09 17:04:51 +02:00

72 lines
1.9 KiB
Python

from collections.abc import Generator
from sqlalchemy import create_engine
from sqlalchemy.engine import Engine
from sqlalchemy.orm import Session, declarative_base, sessionmaker
Base = declarative_base()
# Engine and session factory are created lazily so that tests can
# override DATABASE_URL via environment *before* any import triggers
# the real PostgreSQL engine creation (which requires psycopg2).
_engine = None
_SessionLocal = None
def _get_engine() -> Engine:
global _engine
if _engine is None:
from app.config import settings
url = settings.DATABASE_URL
kwargs: dict = {}
if url.startswith("postgresql"):
kwargs.update(
pool_size=20,
max_overflow=10,
pool_recycle=3600,
pool_pre_ping=True,
)
_engine = create_engine(url, **kwargs)
return _engine
def _get_session_factory() -> sessionmaker:
global _SessionLocal
if _SessionLocal is None:
_SessionLocal = sessionmaker(
autocommit=False, autoflush=False, bind=_get_engine()
)
return _SessionLocal
class _LazySessionLocal:
"""Proxy so ``SessionLocal()`` keeps working as before but the real
sessionmaker is only created on first call."""
def __call__(self, *args: object, **kwargs: object) -> Session:
return _get_session_factory()(*args, **kwargs)
def __getattr__(self, name: str) -> object:
return getattr(_get_session_factory(), name)
SessionLocal = _LazySessionLocal()
class _EngineProxy:
"""Thin proxy so ``from app.database import engine`` still works."""
def __getattr__(self, name: str) -> object:
return getattr(_get_engine(), name)
engine = _EngineProxy() # type: ignore[assignment]
def get_db() -> Generator[Session, None, None]:
db = SessionLocal()
try:
yield db
finally:
db.close()