ducoterra
022da8e2bc
Foundation (phase 01, verified): - FastAPI app: /api/health, /api/suggestions, /api/chat (placeholder), static frontend served locally (no CDN) - Postgres 17 + pgvector via db/Containerfile + compose.yaml (podman compose up -d db), Alembic initial migration (documents, chunks with vector(768), query_log) - LLM client targeting https://aipi.reeseapps.com/v1 (turbo/embed); scripts/llm_probe.py verified models + 768-dim embeddings live - Conditional debugpy: imported only when DEBUGPY=1 (attach on demand, :5678); logging config for clean single-line logs - Frontend shell: mobile-first chat + Sources pages, tokens, a11y baselines - Tests: 24 unit+integration (99% coverage on app/), ruff + pyright clean, Playwright smoke E2E (3 tests) against a deterministic mock LLM - Planning: .agent/PLAN.md (architecture + LOCKED decisions), AGENTS.md, 6 user stories, 7 phase files (one story / one phase / one Playwright suite each)
42 lines
1.1 KiB
Python
42 lines
1.1 KiB
Python
"""Database engine & session factory (PostgreSQL 17 + pgvector).
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The engine is created lazily: importing this module never opens a
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connection, so the app boots (and ``/api/health`` reports) even when the
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database is momentarily unavailable.
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"""
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from __future__ import annotations
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from collections.abc import Generator
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from sqlalchemy import create_engine, text
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from sqlalchemy.orm import DeclarativeBase, Session, sessionmaker
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from app.config import get_settings
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class Base(DeclarativeBase):
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pass
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engine = create_engine(get_settings().database_url, pool_pre_ping=True, future=True)
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SessionLocal = sessionmaker(bind=engine, autoflush=False, expire_on_commit=False, future=True)
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def get_db() -> Generator[Session, None, None]:
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"""FastAPI dependency yielding a database session."""
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db = SessionLocal()
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try:
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yield db
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finally:
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db.close()
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def db_available() -> bool:
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"""Cheap liveness probe used by ``/api/health``."""
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try:
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with engine.connect() as conn:
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conn.execute(text("SELECT 1"))
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return True
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except Exception:
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return False
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