34 lines
1.1 KiB
Python
34 lines
1.1 KiB
Python
from sqlalchemy import create_engine
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from sqlalchemy.orm import DeclarativeBase, sessionmaker
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from dotenv import load_dotenv
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import os
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load_dotenv(dotenv_path=os.path.join(os.path.dirname(__file__), '..', '.env'))
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DATABASE_URL = os.getenv("DATABASE_URL", "sqlite:///./aidsmonitoring.db")
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engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
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SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
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class Base(DeclarativeBase):
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pass
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def get_db():
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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 ensure_column(table: str, column: str, ddl: str):
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"""Add `column` to `table` if it doesn't exist. SQLite-safe additive
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migration — runs at startup so model evolutions don't break existing DBs.
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`ddl` is the column definition only, e.g. 'TEXT' or 'REAL DEFAULT 0'."""
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from sqlalchemy import text
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with engine.connect() as conn:
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cols = conn.execute(text(f"PRAGMA table_info({table})")).fetchall()
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if column not in {c[1] for c in cols}:
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conn.execute(text(f"ALTER TABLE {table} ADD COLUMN {column} {ddl}"))
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conn.commit()
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