A weird problem (adodb + mysql)

[Daniel Crespo]

Hi to all,

I'm using adodb for accessing mysql and postgres. My problem relies on
the mysql access.

Sometimes, when I try to execute a query (using ExecTrans method
below), I get this error:

'NoneType' object has no attribute 'cursor'

Maybe this error ocurrs not in my code, but in the mysql module. Does
anyone had had this problem?

Thanks.

The following is my DB connection class.

class DB:
def __init__(self, host=None, user=None, password=None,
database=None):
self.host =
[host,variables.IP_DB][isinstance(host,(types.NoneType))]
self.user =
[user,variables.USER][isinstance(user,(types.NoneType))]
self.password =
[password,variables.PASSWORD][isinstance(password,(types.NoneType))]
self.database =
[database,variables.DATABASE][isinstance(database,(types.NoneType))]

self.bActive = True
self.bConnected = False

def OpenDB(self):

success = False
if self.bActive:
try:
self.conn = adodb.NewADOConnection('mysql')
if not self.conn:
Log.log("Can't connecto to DB-Mysql")
success = False
else :
#Create the connection
ret = self.conn.Connect(self.host, self.user,
self.password, self.database)
if ret:
Log.log("DB-Mysql connection stablished")
success = True
except:
success = False
pass
else:
print "DB connection disabled"
self.bConnected = success
return success

def Exec(self,query,simple=False):
resultado = list()

#Open a DB connection
if self.OpenDB():
Log.log("Executing Query: " + str(query))
cursor = self.conn.Execute(query)
if cursor:
while not cursor.EOF:
if not simple:
resultado.append(cursor.GetRowAssoc())
cursor.MoveNext()
else :
resultado.append(cursor.FetchRow())
#Close Cursor
cursor.Close()
else:
resultado = None
self.CloseDB()
else:
resultado = None
return resultado

def ExecTrans(self, lQueries):

success = False
if self.OpenDB():
print "Executing Querys: " + str(lQueries)

#Begin Transaction
self.conn.BeginTrans()

#Execute each query in lQueries
for query in lQueries:
self.conn.Execute(query)
if self.conn._errno != 0 :
success = False
break;
else:
success = True

#End of transaction
if success:
self.conn.CommitTrans()
else:
self.conn.RollbackTrans()

#Closing DB
self.CloseDB()
return success

def TestConnection(self):
if self.OpenDB():
self.CloseDB()
return True
return False

def CloseDB(self):
if self.conn.IsConnected() :
self.conn.Close()
return