rebase

app/migrations/versions/001_initial_schema.py

@@ -0,0 +1,29 @@
+"""Initial schema migration — creates all tables.
+
+This is a hand-rolled async migration that creates all tables defined in
+`app.models` via SQLAlchemy `Base.metadata.create_all`. It is the equivalent
+of alembic migration 001.
+
+For real-world deployments the project includes an `alembic.ini` and
+`alembic env.py` so that incremental migrations can be added — but for the
+MVP we use this single idempotent script.
+"""
+
+from __future__ import annotations
+
+from sqlalchemy.ext.asyncio import AsyncEngine
+
+from app.db import Base
+from app.models import *  # noqa: F401,F403 — ensure all models are imported
+
+
+async def create_all_tables(engine: AsyncEngine) -> None:
+    """Create all tables defined on Base.metadata. Idempotent."""
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)
+
+
+async def drop_all_tables(engine: AsyncEngine) -> None:
+    """Drop all tables. Used in tests."""
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.drop_all)