41 lines
1.0 KiB
Python
41 lines
1.0 KiB
Python
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"""
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Database layer — engine & session SQLAlchemy.
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- Engine dibuat hanya bila DATABASE_URL tersedia (agar aplikasi tetap bisa
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berjalan dengan STORAGE_BACKEND=csv / dev tanpa PostgreSQL).
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- Skema TIDAK dibuat via create_all di produksi — memakai Alembic
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(elemes.sh db upgrade).
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"""
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import os
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from sqlalchemy import create_engine
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from sqlalchemy.orm import declarative_base, sessionmaker
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DATABASE_URL = os.environ.get("DATABASE_URL", "").strip()
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engine = None
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SessionLocal = None
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if DATABASE_URL:
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engine = create_engine(
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DATABASE_URL,
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pool_pre_ping=True,
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pool_size=5,
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max_overflow=10,
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)
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SessionLocal = sessionmaker(bind=engine, autoflush=False, expire_on_commit=False)
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Base = declarative_base()
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def get_db():
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"""Dependency generator: session per request, commit/rollback di pemakai."""
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if SessionLocal is None:
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raise RuntimeError("DATABASE_URL belum diset — storage PostgreSQL tidak aktif")
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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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