"""manufacturers_url_nullable

Revision ID: 0fec09fb6ae6
Revises: 9a1c2f6e0b3d
Create Date: 2026-09-04 23:05:18.990806
"""

from collections.abc import Sequence

import sqlalchemy as sa

from alembic import op

# revision identifiers, used by Alembic.
revision: str = "0fec09fb6ae6"
down_revision: str | None = "9a1c2f6e0b3d"
branch_labels: str | Sequence[str] | None = None
depends_on: str | Sequence[str] | None = None


def upgrade() -> None:
    with op.batch_alter_table("manufacturers", schema=None) as batch_op:
        batch_op.alter_column(
            "url",
            existing_type=sa.String(),
            nullable=True,
        )


def downgrade() -> None:
    op.execute("UPDATE manufacturers SET url = '' WHERE url IS NULL")
    with op.batch_alter_table("manufacturers", schema=None) as batch_op:
        batch_op.alter_column(
            "url",
            existing_type=sa.String(),
            nullable=False,
        )