Refine seller store implementation

server/migrations/versions/b5d2c9a3e1f7_add_background_jobs.py

@@ -19,7 +19,14 @@ depends_on = None
 def upgrade() -> None:
     # 开发态 FastAPI 会在 startup 以 Base.metadata.create_all 兜底；若它先于 Alembic
     # 启动，表已完整存在，此处只补迁移版本记录，避免 create_table 冲突。
-    if "background_jobs" in sa.inspect(op.get_bind()).get_table_names():
+    inspector = sa.inspect(op.get_bind())
+    if "background_jobs" in inspector.get_table_names():
+        # 开发态若先由 metadata.create_all 建表，仍补上后来新增的索引。
+        existing_indexes = {
+            index["name"] for index in inspector.get_indexes("background_job_items")
+        }
+        if "ix_background_job_items_updated_at" not in existing_indexes:
+            op.create_index("ix_background_job_items_updated_at", "background_job_items", ["updated_at"])
         return
     op.create_table(
         "background_jobs",
@@ -85,8 +92,10 @@ def upgrade() -> None:
     op.create_index("ix_background_job_items_provider_task_id", "background_job_items", ["provider_task_id"])
     op.create_index("ix_background_job_items_next_run_at", "background_job_items", ["next_run_at"])
     op.create_index("ix_background_job_items_lease_expires_at", "background_job_items", ["lease_expires_at"])
+    op.create_index("ix_background_job_items_updated_at", "background_job_items", ["updated_at"])
 
 
 def downgrade() -> None:
+    op.drop_index("ix_background_job_items_updated_at", table_name="background_job_items")
     op.drop_table("background_job_items")
     op.drop_table("background_jobs")