Ubuntu
33 lines
1.3 KiB
Python
33 lines
1.3 KiB
Python
"""彻底删除老的 news_posts / news_categories 表。
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运行前已手动备份 cms.db -> cms.db.backup_before_news_cleanup_20260429
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"""
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from sqlalchemy import create_engine, text
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engine = create_engine('sqlite:///cms.db')
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with engine.connect() as conn:
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# 先看看在不在
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tables_before = [r[0] for r in conn.execute(text(
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"SELECT name FROM sqlite_master WHERE type='table' AND name IN ('news_posts','news_categories')"
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)).fetchall()]
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print(f"清理前存在的老表: {tables_before}")
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# 记录数据量（仅记录，不影响清理）
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for t in tables_before:
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cnt = conn.execute(text(f"SELECT COUNT(*) FROM {t}")).scalar()
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print(f" {t}: {cnt} 行")
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# DROP 顺序：先 news_posts（含 FK 指向 news_categories），再 news_categories
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if 'news_posts' in tables_before:
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conn.execute(text("DROP TABLE news_posts"))
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print("已 DROP TABLE news_posts")
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if 'news_categories' in tables_before:
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conn.execute(text("DROP TABLE news_categories"))
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print("已 DROP TABLE news_categories")
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conn.commit()
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tables_after = [r[0] for r in conn.execute(text(
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"SELECT name FROM sqlite_master WHERE type='table' AND name IN ('news_posts','news_categories')"
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)).fetchall()]
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print(f"\n清理后存在的老表: {tables_after}（应为空）")
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