Spaces:
Paused
Paused
File size: 2,160 Bytes
fa8d021 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 | import uuid
from contextlib import asynccontextmanager
from fastapi import Depends
from sqlalchemy import text
from sqlalchemy.ext.asyncio import AsyncSession
from src.config import settings
from src.db import SessionLocal, request_context
async def get_db():
"""FastAPI Dependency Generator for Database"""
context = request_context.get() or "unknown"
db: AsyncSession = SessionLocal()
try:
if settings.DB.TRACING:
await db.execute(
text("SELECT set_config('application_name', :name, false)"),
{"name": context},
)
yield db
except Exception:
await db.rollback()
raise
finally:
# Always send ROLLBACK unconditionally so the wire-level transaction
# is closed before the TCP connection drops. Supavisor v2 does NOT
# clean up orphaned transactions on client disconnect in transaction-
# pooling mode, so relying on `in_transaction()` (Python-side state)
# can leave the backend pinned with an open BEGIN.
await db.rollback()
await db.close()
@asynccontextmanager
async def tracked_db(operation_name: str | None = None):
"""Context manager for tracked database sessions"""
# Get request ID if available, or create operation-specific one
context = request_context.get()
token = None
if not context and operation_name:
context = f"task:{operation_name}:{str(uuid.uuid4())[:8]}"
token = request_context.set(context)
# Create session with tracking info
db = SessionLocal()
try:
if settings.DB.TRACING:
await db.execute(
text("SELECT set_config('application_name', :name, false)"),
{"name": context or f"task:{operation_name}"},
)
yield db
except Exception:
await db.rollback()
raise
finally:
# Always send ROLLBACK unconditionally — see get_db() comment.
await db.rollback()
await db.close()
if token: # Only reset if we set it
request_context.reset(token)
db: AsyncSession = Depends(get_db)
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