100 lines
2.9 KiB
Python
100 lines
2.9 KiB
Python
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"""
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数据库迁移脚本 - 为News表添加source_name和source_icon字段
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版本：v2.2.0
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日期：2025-01-30
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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 v2.2.0")
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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 = 'news'
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AND COLUMN_NAME IN ('source_name', 'source_icon')
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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 source_name 字段
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if 'source_name' not in existing_columns:
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print("\n1. 添加 source_name 字段...")
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cursor.execute("""
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ALTER TABLE news
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ADD COLUMN source_name VARCHAR(100)
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COMMENT '新闻来源网站名称'
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AFTER url
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""")
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print(">>> source_name 字段添加成功")
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else:
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print("\n1. source_name 字段已存在，跳过")
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# 添加 source_icon 字段
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if 'source_icon' not in existing_columns:
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print("\n2. 添加 source_icon 字段...")
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cursor.execute("""
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ALTER TABLE news
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ADD COLUMN source_icon VARCHAR(500)
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COMMENT '新闻来源网站图标URL'
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AFTER source_name
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""")
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print(">>> source_icon 字段添加成功")
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else:
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print("\n2. source_icon 字段已存在，跳过")
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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 news 表结构：")
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cursor.execute("DESCRIBE news")
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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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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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