那几个SQL都没报错，但是就是不给提交~
# coding:utf8
import sys
import MySQLdb
class TransferMoney(object):
def __init__(self,conn):
self.conn =conn
def check_acct_available(self, source_acctid):
cursor =self.conn.cursor()
try:
sql="select * from account where accid=%s" %source_acctid
cursor.execute(sql)
print"check_acct_available:"+sql
rs =cursor.fetchall()
if len(rs) !=1:
raise Exception("账号%s不存在"%source_acctid)
finally:
cursor.close()
def has_enough_money(self, source_acctid, money):
cursor =self.conn.cursor()
try:
sql="select * from account where accid=%s and money>%s" %(source_acctid,money)
cursor.execute(sql)
print"has_enough_money:"+sql
rs =cursor.fetchall()
if len(rs) !=1:
raise Exception("%s钱不够"%source_acctid)
finally:
cursor.close()
def reduce_money(self, source_acctid, money):
cursor =self.conn.cursor()
try:
sql="update account set money=money-%s where accid=%s " %(money,source_acctid)
cursor.execute(sql)
print"reduce_money:"+sql
if cursor.rowcount !=1:
raise Exception("%s操作失败"%source_acctid)
finally:
cursor.close()
def add_money(self, target_acctid, money):
cursor =self.conn.cursor()
try:
sql="update account set money=money+%s where accid=%s" %(money,source_acctid)
cursor.execute(sql)
print"add_money"+sql
if cursor.rowcount !=1:
raise Exception("%s操作失败"%source_acctid)
finally:
cursor.close()
def insert1(self, source_acctid, target_acctid):
cursor=self.conn.cursor()
try:
sql="insert into account values (3,100)"
cursor.execute(sql)
print sql
if cursor.rowcount !=1:
raise Exception("添加失败")
finally:
cursor.close()
def transfer(self,source_acctid,target_acctid,money):
try:
self.insert1(source_acctid,target_acctid)
self.check_acct_available(source_acctid)
self.check_acct_available(target_acctid)
self.has_enough_money(source_acctid,money)
self.reduce_money(source_acctid,money)
self.add_money(target_acctid,money)
self.conn.commit()
except Exception as e:
self.conn.rollback()
raise e
if __name__=="__main__":
source_acctid=sys.argv[1]
target_acctid=sys.argv[2]
money =sys.argv[3]
conn=MySQLdb.Connect(host='127.0.0.1',user='root',passwd='111111',port=3306,db='test')
tr_money =TransferMoney(conn)
try:
tr_money.transfer(source_acctid,target_acctid,money)
print '111'
except Exception as e:
print e
finally:
conn.close()
