108 lines
4.0 KiB
Python
108 lines
4.0 KiB
Python
# 声明：本代码仅供学习和研究目的使用。使用者应遵守以下原则：
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# 1. 不得用于任何商业用途。
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# 2. 使用时应遵守目标平台的使用条款和robots.txt规则。
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# 3. 不得进行大规模爬取或对平台造成运营干扰。
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# 4. 应合理控制请求频率，避免给目标平台带来不必要的负担。
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# 5. 不得用于任何非法或不当的用途。
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#
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# 详细许可条款请参阅项目根目录下的LICENSE文件。
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# 使用本代码即表示您同意遵守上述原则和LICENSE中的所有条款。
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# -*- coding: utf-8 -*-
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# @Author : relakkes@gmail.com
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# @Time : 2024/4/6 14:21
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# @Desc : 异步Aiomysql的增删改查封装
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from typing import Any, Dict, List, Union
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import aiomysql
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class AsyncMysqlDB:
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def __init__(self, pool: aiomysql.Pool) -> None:
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self.__pool = pool
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async def query(self, sql: str, *args: Union[str, int]) -> List[Dict[str, Any]]:
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"""
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从给定的 SQL 中查询记录，返回的是一个列表
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:param sql: 查询的sql
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:param args: sql中传递动态参数列表
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:return:
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"""
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async with self.__pool.acquire() as conn:
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async with conn.cursor(aiomysql.DictCursor) as cur:
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await cur.execute(sql, args)
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data = await cur.fetchall()
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return data or []
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async def get_first(self, sql: str, *args: Union[str, int]) -> Union[Dict[str, Any], None]:
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"""
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从给定的 SQL 中查询记录，返回的是符合条件的第一个结果
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:param sql: 查询的sql
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:param args:sql中传递动态参数列表
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:return:
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"""
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async with self.__pool.acquire() as conn:
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async with conn.cursor(aiomysql.DictCursor) as cur:
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await cur.execute(sql, args)
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data = await cur.fetchone()
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return data
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async def item_to_table(self, table_name: str, item: Dict[str, Any]) -> int:
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"""
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表中插入数据
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:param table_name: 表名
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:param item: 一条记录的字典信息
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:return:
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"""
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fields = list(item.keys())
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values = list(item.values())
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fields = [f'`{field}`' for field in fields]
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fieldstr = ','.join(fields)
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valstr = ','.join(['%s'] * len(item))
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sql = "INSERT INTO %s (%s) VALUES(%s)" % (table_name, fieldstr, valstr)
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async with self.__pool.acquire() as conn:
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async with conn.cursor(aiomysql.DictCursor) as cur:
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await cur.execute(sql, values)
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lastrowid = cur.lastrowid
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return lastrowid
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async def update_table(self, table_name: str, updates: Dict[str, Any], field_where: str,
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value_where: Union[str, int, float]) -> int:
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"""
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更新指定表的记录
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:param table_name: 表名
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:param updates: 需要更新的字段和值的 key - value 映射
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:param field_where: update 语句 where 条件中的字段名
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:param value_where: update 语句 where 条件中的字段值
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:return:
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"""
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upsets = []
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values = []
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for k, v in updates.items():
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s = '`%s`=%%s' % k
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upsets.append(s)
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values.append(v)
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upsets = ','.join(upsets)
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sql = 'UPDATE %s SET %s WHERE %s="%s"' % (
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table_name,
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upsets,
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field_where, value_where,
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)
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async with self.__pool.acquire() as conn:
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async with conn.cursor() as cur:
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rows = await cur.execute(sql, values)
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return rows
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async def execute(self, sql: str, *args: Union[str, int]) -> int:
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"""
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需要更新、写入等操作的 excute 执行语句
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:param sql:
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:param args:
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:return:
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"""
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async with self.__pool.acquire() as conn:
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async with conn.cursor() as cur:
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rows = await cur.execute(sql, args)
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return rows
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