"""make payer_id nullable in payment_requests_customers

Revision ID: chk005_make_payer_id_nullable
Revises: ef0c1f09215d
Create Date: 2026-04-06

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = 'chk005_make_payer_id_nullable'
down_revision: Union[str, Sequence[str], None] = 'ef0c1f09215d'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.alter_column('payment_requests_customers', 'payer_id',
                    existing_type=sa.INTEGER(),
                    nullable=True)


def downgrade() -> None:
    op.alter_column('payment_requests_customers', 'payer_id',
                    existing_type=sa.INTEGER(),
                    nullable=False)