108 lines
3.3 KiB
Python
108 lines
3.3 KiB
Python
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"""
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数据库迁移脚本 - 为Sites表添加news_keywords字段
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版本：v2.3.0
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日期：2025-12-31
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"""
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import pymysql
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import os
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from dotenv import load_dotenv
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# 加载环境变量
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load_dotenv()
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def migrate():
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"""执行数据库迁移"""
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# 数据库配置
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db_config = {
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'host': os.environ.get('DB_HOST', 'localhost'),
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'port': int(os.environ.get('DB_PORT', 3306)),
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'user': os.environ.get('DB_USER', 'root'),
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'password': os.environ.get('DB_PASSWORD', ''),
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'database': os.environ.get('DB_NAME', 'ai_nav'),
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'charset': 'utf8mb4'
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}
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try:
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# 连接数据库
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connection = pymysql.connect(**db_config)
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cursor = connection.cursor()
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print("=" * 60)
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print("开始执行数据库迁移 v2.3.0")
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print("=" * 60)
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# 检查字段是否已存在
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cursor.execute("""
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SELECT COLUMN_NAME
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FROM INFORMATION_SCHEMA.COLUMNS
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WHERE TABLE_SCHEMA = %s
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AND TABLE_NAME = 'sites'
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AND COLUMN_NAME = 'news_keywords'
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""", (db_config['database'],))
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existing_columns = [row[0] for row in cursor.fetchall()]
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# 添加 news_keywords 字段
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if 'news_keywords' not in existing_columns:
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print("\n1. 添加 news_keywords 字段...")
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cursor.execute("""
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ALTER TABLE sites
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ADD COLUMN news_keywords VARCHAR(200)
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COMMENT '新闻获取关键词（用于精准匹配相关新闻）'
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AFTER features
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""")
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print(">>> news_keywords 字段添加成功")
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else:
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print("\n1. news_keywords 字段已存在，跳过")
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# 可选：为现有网站设置默认关键词（使用网站名称）
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if 'news_keywords' not in existing_columns:
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print("\n2. 为现有网站设置默认关键词（使用网站名称）...")
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cursor.execute("""
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UPDATE sites
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SET news_keywords = name
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WHERE news_keywords IS NULL OR news_keywords = ''
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""")
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affected_rows = cursor.rowcount
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print(f">>> 已更新 {affected_rows} 个网站的默认关键词")
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# 提交事务
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connection.commit()
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print("\n" + "=" * 60)
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print(">>> 数据库迁移完成！")
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print("=" * 60)
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# 显示表结构
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print("\n当前 sites 表结构：")
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cursor.execute("DESCRIBE sites")
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for row in cursor.fetchall():
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print(f" - {row[0]}: {row[1]} {row[2]}")
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# 显示示例数据
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print("\n示例数据（前5条）：")
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cursor.execute("""
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SELECT id, name, news_keywords
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FROM sites
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LIMIT 5
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""")
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for row in cursor.fetchall():
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print(f" ID: {row[0]}, 名称: {row[1]}, 关键词: {row[2] or '(空)'}")
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except Exception as e:
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print(f"\n>>> 迁移失败：{str(e)}")
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if 'connection' in locals():
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connection.rollback()
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raise
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finally:
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if 'cursor' in locals():
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cursor.close()
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if 'connection' in locals():
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connection.close()
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print("\n数据库连接已关闭")
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if __name__ == '__main__':
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migrate()
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