65 lines
2.0 KiB
Python
65 lines
2.0 KiB
Python
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"""refresh_tokens：轮换 lineage（replaced_by_token_id + rotated_at）
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Revision ID: 0020_refresh_rt_lineage
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Revises: 0019_align_legacy_schema
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"""
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from typing import Sequence, Union
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import sqlalchemy as sa
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from alembic import op
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revision: str = "0020_refresh_rt_lineage"
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down_revision: Union[str, None] = "0019_align_legacy_schema"
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branch_labels: Union[str, Sequence[str], None] = None
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depends_on: Union[str, Sequence[str], None] = None
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def _column_names(table_name: str) -> set[str]:
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bind = op.get_bind()
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inspector = sa.inspect(bind)
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return {column["name"] for column in inspector.get_columns(table_name)}
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def upgrade() -> None:
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columns = _column_names("refresh_tokens")
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if "replaced_by_token_id" not in columns:
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op.add_column(
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"refresh_tokens",
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sa.Column("replaced_by_token_id", sa.String(), nullable=True),
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)
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op.create_index(
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"ix_refresh_tokens_replaced_by_token_id",
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"refresh_tokens",
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["replaced_by_token_id"],
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unique=False,
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)
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op.create_foreign_key(
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"fk_refresh_tokens_replaced_by_token_id",
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"refresh_tokens",
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"refresh_tokens",
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["replaced_by_token_id"],
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["id"],
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ondelete="SET NULL",
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)
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if "rotated_at" not in columns:
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op.add_column(
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"refresh_tokens",
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sa.Column("rotated_at", sa.DateTime(timezone=True), nullable=True),
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)
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def downgrade() -> None:
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columns = _column_names("refresh_tokens")
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if "replaced_by_token_id" in columns:
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op.drop_constraint(
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"fk_refresh_tokens_replaced_by_token_id",
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"refresh_tokens",
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type_="foreignkey",
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)
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op.drop_index("ix_refresh_tokens_replaced_by_token_id", table_name="refresh_tokens")
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op.drop_column("refresh_tokens", "replaced_by_token_id")
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if "rotated_at" in columns:
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op.drop_column("refresh_tokens", "rotated_at")
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