"""voice_clip matched_friend_id

Revision ID: b3c4d5e6f7a8
Revises: a1b2c3d4e5f6
Create Date: 2026-08-10 00:00:00.000000

"""
from collections.abc import Sequence

import sqlalchemy as sa
from alembic import op


# revision identifiers, used by Alembic.
revision: str = 'b3c4d5e6f7a8'
down_revision: str | Sequence[str] | None = 'a1b2c3d4e5f6'
branch_labels: str | Sequence[str] | None = None
depends_on: str | Sequence[str] | None = None


def upgrade() -> None:
    """Upgrade schema."""
    # LOCAL-only 手动匹配 column: references customer.friend_id. NULL = unmatched.
    # batch_alter_table keeps this portable across SQLite (dev/test, table-recreate)
    # and MySQL (prod, direct ALTER). See env.py render_as_batch wiring.
    with op.batch_alter_table('voice_clip', schema=None) as batch_op:
        batch_op.add_column(
            sa.Column('matched_friend_id', sa.String(length=128), nullable=True)
        )


def downgrade() -> None:
    """Downgrade schema."""
    with op.batch_alter_table('voice_clip', schema=None) as batch_op:
        batch_op.drop_column('matched_friend_id')