43 lines
1.1 KiB
Python
43 lines
1.1 KiB
Python
"""Database engine, session, and base model."""
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from sqlalchemy import create_engine, event
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from sqlalchemy.orm import sessionmaker, DeclarativeBase
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from app.config import settings
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# Engine
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if settings.DATABASE_URL.startswith("sqlite"):
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engine = create_engine(
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settings.DATABASE_URL,
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connect_args={"check_same_thread": False},
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echo=False,
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)
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# Enable foreign keys for SQLite
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@event.listens_for(engine, "connect")
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def _fk_pragma_on_connect(dbapi_con, con_record):
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cursor = dbapi_con.cursor()
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cursor.execute("PRAGMA foreign_keys=ON")
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cursor.close()
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else:
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engine = create_engine(settings.DATABASE_URL, echo=False, pool_pre_ping=True)
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SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
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class Base(DeclarativeBase):
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"""Declarative base for all models."""
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pass
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def get_db():
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"""FastAPI dependency: yields 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 init_db():
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"""Create all tables (used for dev / first run)."""
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Base.metadata.create_all(bind=engine)
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