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tools.py
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tools.py
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# coding=utf-8
import aiomysql
from pymysql.err import IntegrityError
def create_args_string(num):
l_list = []
for n in range(num):
l_list.append('?')
return ', '.join(l_list)
async def select(db_pool, sql, args, size=None):
async with db_pool.acquire() as conn:
async with conn.cursor(aiomysql.DictCursor) as cur:
# try:
await cur.execute(sql.replace('?', '%s'), args or ())
# print(cur.description)
if size:
rs = await cur.fetchmany(size)
else:
rs = await cur.fetchall()
# (r,) = await cur.fetchone()
await cur.close()
# print('rows returned: %s' % len(rs))
return rs
# finally:
# if cur:
# await cur.close()
# # 释放掉conn,将连接放回到连接池中
# await db_pool.release(conn)
#
async def execute(db_pool, sql, args, autocommit=True):
async with db_pool.acquire() as conn:
if not autocommit:
await conn.begin()
async with conn.cursor(aiomysql.DictCursor) as cur:
try:
await cur.execute(sql.replace('?', '%s'), args)
last_id = cur.lastrowid
affected = cur.rowcount
await cur.close()
if not autocommit:
await conn.commit()
except IntegrityError:
return f'IntegrityError', 0
except BaseException as e:
if not autocommit:
await conn.rollback()
raise Exception(f"err_type:\n{e.__class__.__name__}\nlast_executed_sql:\n{cur._last_executed}\n error:\n{e}")
return last_id, affected
async def _exec_select_sql(db_pool, sql, args, size=None):
async with db_pool.acquire() as conn:
async with conn.cursor(aiomysql.DictCursor) as cur:
# try:
await cur.execute(sql.replace('?', '%s'), args or ())
# print(cur.description)
if size:
rs = await cur.fetchmany(size)
else:
rs = await cur.fetchall()
# (r,) = await cur.fetchone()
await cur.close()
# print('rows returned: %s' % len(rs))
return rs
# finally:
# if cur:
# await cur.close()
# # 释放掉conn,将连接放回到连接池中
# await db_pool.release(conn)
#
async def _execute(db_pool, sql, args, autocommit=True):
async with db_pool.acquire() as conn:
if not autocommit:
await conn.begin()
async with conn.cursor(aiomysql.DictCursor) as cur:
try:
await cur.execute(sql.replace('?', '%s'), args)
last_id = cur.lastrowid
affected = cur.rowcount
await cur.close()
if not autocommit:
await conn.commit()
except BaseException as e:
_last_executed = cur._last_executed
if not autocommit:
await conn.rollback()
raise Exception(f"{e.__class__.__name__}\nlast_executed_sql:\n{_last_executed}\n error_content:\n{e}")
return last_id, affected
def _create_args_string(num):
L = []
for n in range(num):
L.append('?')
return ', '.join(L)