feat: dedup downloads by (url, format_id) index, reuse existing files

2026-02-18 23:00:49 +08:00
parent 25c4973f57
commit 0bab021e21
4 changed files with 36 additions and 4 deletions
--- a/backend/app/database.py
+++ b/backend/app/database.py
@@ -21,3 +21,9 @@ async def get_db():
 async def init_db():
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)
+        # Ensure composite index exists on already-created tables (idempotent)
+        await conn.execute(
+            __import__("sqlalchemy").text(
+                "CREATE INDEX IF NOT EXISTS ix_video_url_format_id ON videos (url, format_id)"
+            )
+        )