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50 lines
1.4 KiB
Python
50 lines
1.4 KiB
Python
"""2.2.17
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为整理历史保存音乐实体类型和专辑总曲目数
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Revision ID: d4f6a8c2e1b7
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Revises: c9d4e7f1a2b3
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Create Date: 2026-08-10
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"""
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from alembic import op
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import sqlalchemy as sa
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revision = "d4f6a8c2e1b7"
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down_revision = "c9d4e7f1a2b3"
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branch_labels = None
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depends_on = None
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def _has_column(table_name: str, column_name: str) -> bool:
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"""检查数据表是否已存在指定字段。"""
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inspector = sa.inspect(op.get_bind())
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if table_name not in inspector.get_table_names():
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return False
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return any(
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column["name"] == column_name
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for column in inspector.get_columns(table_name)
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)
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def upgrade() -> None:
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"""为整理历史补充音乐重试所需的实体字段。"""
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if not _has_column("transferhistory", "music_type"):
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op.add_column(
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"transferhistory",
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sa.Column("music_type", sa.String(), nullable=True),
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)
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if not _has_column("transferhistory", "total_tracks"):
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op.add_column(
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"transferhistory",
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sa.Column("total_tracks", sa.Integer(), nullable=True),
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)
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def downgrade() -> None:
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"""移除整理历史中的音乐实体字段。"""
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if _has_column("transferhistory", "total_tracks"):
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op.drop_column("transferhistory", "total_tracks")
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if _has_column("transferhistory", "music_type"):
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op.drop_column("transferhistory", "music_type")
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