Track sold cars

alembic/versions/005_add_car_seen_sold_timestamps.py

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+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = "005_add_car_seen_sold_timestamps"
+down_revision: Union[str, None] = "004_add_ingestion_tables"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "MOBILEDE_cars",
+        sa.Column("first_seen_at", sa.DateTime(timezone=True), nullable=True),
+    )
+    op.add_column(
+        "MOBILEDE_cars",
+        sa.Column("sold_at", sa.DateTime(timezone=True), nullable=True),
+    )
+    op.execute('UPDATE "MOBILEDE_cars" SET first_seen_at = last_seen_at WHERE first_seen_at IS NULL')
+    op.alter_column("MOBILEDE_cars", "first_seen_at", nullable=False)
+    op.create_index("ix_MOBILEDE_cars_first_seen_at", "MOBILEDE_cars", ["first_seen_at"])
+    op.create_index("ix_MOBILEDE_cars_sold_at", "MOBILEDE_cars", ["sold_at"])
+
+
+def downgrade() -> None:
+    op.drop_index("ix_MOBILEDE_cars_sold_at", table_name="MOBILEDE_cars")
+    op.drop_index("ix_MOBILEDE_cars_first_seen_at", table_name="MOBILEDE_cars")
+    op.drop_column("MOBILEDE_cars", "sold_at")
+    op.drop_column("MOBILEDE_cars", "first_seen_at")