fix car mapping

alembic/versions/003_add_composite_indexes.py

@@ -0,0 +1,38 @@
+# Индексы для масштабированной БД (20k+ записей)
+from typing import Sequence, Union
+
+from alembic import op
+
+revision: str = "003_add_composite_indexes"
+down_revision: Union[str, None] = "002_add_indexes"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # Partial index для активных машин DUBIZZLE (is_sold = FALSE)
+    # Ускоряет поиск при mark_sold операциях
+    op.execute(
+        "CREATE INDEX IF NOT EXISTS ix_cars_active_dubizzle "
+        "ON cars (origin_url) "
+        "WHERE is_sold = FALSE AND origin_id LIKE 'dubizzle:%'"
+    )
+
+    # Composite index для проверки дубликатов изображений
+    op.create_index(
+        "ix_images_car_id_fullres",
+        "images",
+        ["car_id", "fullres_image"],
+    )
+
+    # Index для быстрого поиска existing машин по origin_url
+    op.execute(
+        "CREATE INDEX IF NOT EXISTS ix_cars_origin_url_id "
+        "ON cars (origin_url, origin_id)"
+    )
+
+
+def downgrade() -> None:
+    op.execute("DROP INDEX IF EXISTS ix_cars_origin_url_id")
+    op.drop_index("ix_images_car_id_fullres", table_name="images")
+    op.execute("DROP INDEX IF EXISTS ix_cars_active_dubizzle")