kopia lustrzana https://github.com/bugout-dev/moonstream
41 wiersze
1.2 KiB
Python
41 wiersze
1.2 KiB
Python
"""
|
|
Exploration database connection.
|
|
"""
|
|
from contextlib import contextmanager
|
|
import os
|
|
|
|
from sqlalchemy import create_engine
|
|
from sqlalchemy.orm import sessionmaker, Session
|
|
|
|
EXPLORATION_DB_URI = os.environ.get("EXPLORATION_DB_URI")
|
|
if EXPLORATION_DB_URI is None:
|
|
raise ValueError("EXPLORATION_DB_URI environment variable must be set")
|
|
EXPLORATION_POOL_SIZE_RAW = os.environ.get("EXPLORATION_POOL_SIZE", 0)
|
|
try:
|
|
if EXPLORATION_POOL_SIZE_RAW is not None:
|
|
EXPLORATION_POOL_SIZE = int(EXPLORATION_POOL_SIZE_RAW)
|
|
except:
|
|
raise Exception(
|
|
f"Could not parse EXPLORATION_POOL_SIZE as int: {EXPLORATION_POOL_SIZE_RAW}"
|
|
)
|
|
|
|
# https://docs.sqlalchemy.org/en/14/core/pooling.html#sqlalchemy.pool.QueuePool
|
|
engine = create_engine(EXPLORATION_DB_URI, pool_size=EXPLORATION_POOL_SIZE)
|
|
SessionLocal = sessionmaker(bind=engine)
|
|
|
|
|
|
def yield_db_session() -> Session:
|
|
"""
|
|
Yields a database connection (created using environment variables).
|
|
As per FastAPI docs:
|
|
https://fastapi.tiangolo.com/tutorial/sql-databases/#create-a-dependency
|
|
"""
|
|
session = SessionLocal()
|
|
try:
|
|
yield session
|
|
finally:
|
|
session.close()
|
|
|
|
|
|
yield_db_session_ctx = contextmanager(yield_db_session)
|