问题描述:在使用aiomysql库选择数据时,发现数据未被更新。
解决方法:
# 示例代码
async def update_data(conn, data):
try:
async with conn.cursor() as cursor:
# 更新数据的SQL语句
sql = "UPDATE table SET column = %s WHERE condition = %s"
await cursor.execute(sql, (data, condition))
await conn.commit() # 提交事务
except Exception as e:
await conn.rollback() # 出现错误时回滚事务
raise e
# 示例代码
async def select_data(conn, condition):
try:
async with conn.cursor() as cursor:
# 查询数据的SQL语句
sql = "SELECT column FROM table WHERE condition = %s"
await cursor.execute(sql, (condition,))
result = await cursor.fetchall()
return result
except Exception as e:
raise e
aiomysql.create_pool
或aiomysql.create_connection
创建连接池或连接对象。确保连接的方式正确。# 示例代码 - 使用连接池
import aiomysql
async def connect_database():
pool = await aiomysql.create_pool(
host='localhost',
port=3306,
user='root',
password='password',
db='database',
autocommit=True # 设置自动提交事务
)
return pool
async def main():
pool = await connect_database()
async with pool.acquire() as conn:
# 执行数据更新和查询操作
await update_data(conn, data)
result = await select_data(conn, condition)
print(result)
# 运行主函数
asyncio.run(main())
通过检查数据更新和查询的代码逻辑,并确保使用了正确的连接方式,可以解决aiomysql选择数据未更新的问题。