update alembic migrations

alembic/versions/001_initial.py

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+# Начальная схема: cars, images, sync_runs
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+revision: str = "001_initial"
+down_revision: Union[str, None] = None
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # Таблица cars — автомобили с Encar
+    op.create_table(
+        "cars",
+        sa.Column("id", sa.BigInteger, primary_key=True, autoincrement=True),
+        sa.Column("parser_id", sa.String(50), nullable=False, unique=True),
+        sa.Column("brand", sa.String(50), nullable=False),
+        sa.Column("model", sa.String(50), nullable=False),
+        sa.Column("year", sa.Integer, nullable=True),
+        sa.Column("price", sa.BigInteger, nullable=True),
+        sa.Column("currency", sa.String(10), nullable=False, server_default="USD"),
+        sa.Column("mileage", sa.Integer, nullable=False, server_default="0"),
+        sa.Column("country", sa.String(10), nullable=False, server_default="NA"),
+        sa.Column("is_sold", sa.Boolean, nullable=False, server_default=sa.text("false")),
+        sa.Column("color", sa.String, nullable=False, server_default="other"),
+        sa.Column("drive", sa.String(10), nullable=True),
+        sa.Column("gearbox", sa.String(10), nullable=True),
+        sa.Column("steering_wheel", sa.String(10), nullable=True),
+        sa.Column("body_type", sa.String(20), nullable=False, server_default="OTHER"),
+        sa.Column("engine_volume", sa.Integer, nullable=True),
+        sa.Column("selling_type", sa.String(20), nullable=False, server_default="NA"),
+        sa.Column("one_owner", sa.Boolean, nullable=False, server_default=sa.text("false")),
+        sa.Column("new_car", sa.Boolean, nullable=False, server_default=sa.text("false")),
+        sa.Column("is_hidden", sa.Boolean, nullable=False, server_default=sa.text("false")),
+        sa.Column("origin", sa.String(20), nullable=False, server_default="NA"),
+        sa.Column("origin_url", sa.String, nullable=False),
+        sa.Column("origin_id", sa.String, nullable=False, unique=True),
+        sa.Column("is_damaged", sa.Boolean, nullable=False, server_default=sa.text("false")),
+        sa.Column("evaluation", sa.String, nullable=True),
+        sa.Column("non_smoking", sa.Boolean, nullable=False, server_default=sa.text("true")),
+        sa.Column("rental", sa.Boolean, nullable=False, server_default=sa.text("false")),
+        sa.Column("repair_history", sa.Boolean, nullable=False, server_default=sa.text("false")),
+        sa.Column("slug", sa.String, nullable=False),
+        sa.Column("last_seen_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
+    )
+    op.create_index("ix_cars_origin_url", "cars", ["origin_url"])
+    op.create_index("ix_cars_origin_id", "cars", ["origin_id"], unique=True)
+
+    # Таблица images — изображения машин
+    op.create_table(
+        "images",
+        sa.Column("id", sa.BigInteger, primary_key=True, autoincrement=True),
+        sa.Column("fullres_image", sa.String, nullable=False),
+        sa.Column("preview_image", sa.String, nullable=False),
+        sa.Column("order_index", sa.Integer, nullable=False),
+        sa.Column("car_id", sa.Integer, sa.ForeignKey("cars.id", ondelete="CASCADE"), nullable=False),
+    )
+
+    # Таблица sync_runs — логирование синхронизаций
+    op.create_table(
+        "sync_runs",
+        sa.Column("id", sa.BigInteger, primary_key=True, autoincrement=True),
+        sa.Column("started_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
+        sa.Column("finished_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("status", sa.Text, nullable=False),
+        sa.Column("lane", sa.Text, nullable=False),
+        sa.Column("ids_fetched", sa.Integer, nullable=False, server_default="0"),
+        sa.Column("cars_upserted", sa.Integer, nullable=False, server_default="0"),
+        sa.Column("cars_failed", sa.Integer, nullable=False, server_default="0"),
+        sa.Column("images_upserted", sa.Integer, nullable=False, server_default="0"),
+        sa.Column("error_summary", sa.Text, nullable=True),
+    )
+
+def downgrade() -> None:
+    op.drop_table("sync_runs")
+    op.drop_table("images")
+    op.drop_table("cars")

alembic/versions/002_add_indexes.py

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+# Индексы производительности
+from typing import Sequence, Union
+
+from alembic import op
+
+revision: str = "002_add_indexes"
+down_revision: Union[str, None] = "001_initial"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_index("ix_cars_brand", "cars", ["brand"])
+    op.create_index("ix_cars_brand_model", "cars", ["brand", "model"])
+    op.create_index("ix_cars_year", "cars", ["year"])
+    op.create_index("ix_cars_is_sold", "cars", ["is_sold"])
+    op.create_index("ix_cars_last_seen_at", "cars", ["last_seen_at"])
+    op.create_index("ix_images_car_id", "images", ["car_id"])
+    op.create_index("ix_sync_runs_status", "sync_runs", ["status"])
+
+
+def downgrade() -> None:
+    op.drop_index("ix_sync_runs_status", table_name="sync_runs")
+    op.drop_index("ix_images_car_id", table_name="images")
+    op.drop_index("ix_cars_last_seen_at", table_name="cars")
+    op.drop_index("ix_cars_is_sold", table_name="cars")
+    op.drop_index("ix_cars_year", table_name="cars")
+    op.drop_index("ix_cars_brand_model", table_name="cars")
+    op.drop_index("ix_cars_brand", table_name="cars")

alembic/versions/003_add_composite_indexes.py

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+# 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 Encar (is_sold = FALSE)
+    # Ускоряет поиск при mark_sold операциях
+    op.execute(
+        "CREATE INDEX IF NOT EXISTS ix_cars_active_encar "
+        "ON cars (origin_url) "
+        "WHERE is_sold = FALSE AND origin_id LIKE 'encar:%'"
+    )
+
+    # 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_encar")

alembic/versions/004_widen_string_columns.py

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+"""widen parser_id brand model columns
+
+Revision ID: 004
+Revises: 003_add_composite_indexes
+Create Date: 2026-04-15
+"""
+from alembic import op
+import sqlalchemy as sa
+
+revision = "004_widen_string_columns"
+down_revision = "003_add_composite_indexes"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.alter_column("cars", "parser_id", type_=sa.String(255), existing_nullable=False)
+    op.alter_column("cars", "brand", type_=sa.String(100), existing_nullable=False)
+    op.alter_column("cars", "model", type_=sa.String(500), existing_nullable=False)
+
+
+def downgrade() -> None:
+    op.alter_column("cars", "parser_id", type_=sa.String(50), existing_nullable=False)
+    op.alter_column("cars", "brand", type_=sa.String(50), existing_nullable=False)
+    op.alter_column("cars", "model", type_=sa.String(50), existing_nullable=False)

alembic/versions/005_unique_images_constraint.py

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+"""add unique constraint on images(car_id, fullres_image)
+
+Revision ID: 005
+Revises: 004_widen_string_columns
+Create Date: 2026-04-16
+"""
+from alembic import op
+
+revision = "005_unique_images_constraint"
+down_revision = "004_widen_string_columns"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # Удаляем дубли через CTE + ROW_NUMBER (быстрее чем NOT IN subquery)
+    op.execute("""
+        WITH dupes AS (
+            SELECT id,
+                   ROW_NUMBER() OVER (PARTITION BY car_id, fullres_image ORDER BY id) AS rn
+            FROM images
+        )
+        DELETE FROM images WHERE id IN (SELECT id FROM dupes WHERE rn > 1)
+    """)
+    op.create_unique_constraint(
+        "uq_images_car_id_fullres",
+        "images",
+        ["car_id", "fullres_image"],
+    )
+
+
+def downgrade() -> None:
+    op.drop_constraint("uq_images_car_id_fullres", "images", type_="unique")

alembic/versions/006_image_car_id_bigint.py

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+"""widen images.car_id from integer to bigint
+
+Revision ID: 006
+Revises: 005_unique_images_constraint
+Create Date: 2026-04-16
+"""
+import sqlalchemy as sa
+from alembic import op
+
+revision = "006_image_car_id_bigint"
+down_revision = "005_unique_images_constraint"
+
+
+def upgrade() -> None:
+    op.alter_column(
+        "images",
+        "car_id",
+        existing_type=sa.Integer(),
+        type_=sa.BigInteger(),
+        existing_nullable=False,
+    )
+
+
+def downgrade() -> None:
+    op.alter_column(
+        "images",
+        "car_id",
+        existing_type=sa.BigInteger(),
+        type_=sa.Integer(),
+        existing_nullable=False,
+    )