class `InteractionBase` method `log` fails if received tuple, why it receives a tuple?

[maysam senaps]

Hello, our production code failed suddenly with strange error expected string, list found

[Failure instance: Traceback: <type 'exceptions.TypeError'>: sequence item 0: expected string, list found
/usr/lib64/python2.7/threading.py:812:__bootstrap_inner
/usr/lib64/python2.7/threading.py:765:run
/usr/lib64/python2.7/site-packages/twisted/_threads/_threadworker.py:46:work
/usr/lib64/python2.7/site-packages/twisted/_threads/_team.py:190:doWork
--- <exception caught here> ---
/usr/lib64/python2.7/site-packages/twisted/python/threadpool.py:250:inContext
/usr/lib64/python2.7/site-packages/twisted/python/threadpool.py:266:<lambda>
/usr/lib64/python2.7/site-packages/twisted/python/context.py:122:callWithContext
/usr/lib64/python2.7/site-packages/twisted/python/context.py:85:callWithContext
/usr/lib64/python2.7/site-packages/twisted/enterprise/adbapi.py:475:_runInteraction
/usr/lib64/python2.7/site-packages/twisted/enterprise/adbapi.py:465:_runInteraction
/usr/lib/python2.7/site-packages/twistar/dbconfig/base.py:144:_doselect
/usr/lib/python2.7/site-packages/twistar/dbconfig/base.py:79:executeTxn
/usr/lib/python2.7/site-packages/twistar/dbconfig/base.py:47:log

so, I traced my data all the way in the code and didn't find out where it's turned to a tuple, and then the logger fails.

def log(self, query, args, kwargs):
        """
        Log the query and any args or kwargs using C{twisted.python.log.msg} if
        C{InteractionBase.LOG} is True.
        """
        if not InteractionBase.LOG:
            return
        log.msg("TWISTAR query: %s" % query)
        if len(args) > 0:
            try:
                log.msg("TWISTAR args: %s" % ",".join(args))
            except Exception as e:
                pass
        elif len(kwargs) > 0:
            log.msg("TWISTAR kargs: %s" % str(kwargs))

I have added this try/catch so that the code passes, but! how can I find out why is query being turned to a tuple?

this is the query that is sent to the log function:

print str(query), type(query)
(['192.168.56.31'],): <type 'tuple'>

here is how Im using the data:

d = Attackers.find(where=['ip = ?', ip],limit=1)
        d.addCallback(self._check_attacker, ip)
        d.addErrback(self.handle_err)

where ip is a string of "192.168.56.31". the funny thing is the code has been running up until now, and I can't get what has changed.

I have traced the data as follows:

dbobject.py - > select function 

loger("in find where is: " + str(where))
in find where is: ['ip = ?', '192.168.56.31']

dabse.py -> select function:

select function where is: ['ip = ?', '192.168.56.31']
                                                                           │select function whereToString is: ['ip = ?', '192.168.56.31']and: ['192.168.56
                                                                           │.31']type: <type 'list'>




and then the log is:

   log func query is: [SELECT * FROM attackers WHERE ip = %s LIMIT 1] args: (['192.168.56.31'],)

for : 
    loger("log func query is: [" + str(query) + "] args: ["+ str(args)+"] ")

Currently, my code runs with the following code:

def log(self, query, args, kwargs):
    """
    Log the query and any args or kwargs using C{twisted.python.log.msg} if
    C{InteractionBase.LOG} is True.
    """
    if not InteractionBase.LOG:
        return
    log.msg("TWISTAR query: %s" % query)
    if len(args) > 0:
       + try:
            log.msg("TWISTAR args: %s" % ",".join(args))
       + except Exception as e:
        +    pass
    elif len(kwargs) > 0:
        log.msg("TWISTAR kargs: %s" % str(kwargs))

How would I fix this problem permanently? how would I edit the base class using oop? I don't want to run my own fork of the code! (what i am currently doing )

[maysam senaps]

okay, I have traced it multiple times, the thing works fine in version 1.5, not in version 2.
I checked the select function. it's turning args to a list, log when used to log the args fails because of the argument being a list instead of string objects. note the argument itself is a tuple, but and instead of having multiple values to be joined, it has one list as it's first argument.

I don't know how it passes the tests, but it shouldn't! :) it's easy to fix for my case, but, this should be thought of and handled properly.

I just added a * to log function!:)

    def log(self, query, args, kwargs):
    """
    Log the query and any args or kwargs using C{twisted.python.log.msg} if
    C{InteractionBase.LOG} is True.
    """
    if not InteractionBase.LOG:
        return
    log.msg("TWISTAR query: %s" % query)
    if len(args) > 0:
        if isinstance(args[0], list):
            log.msg("TWISTAR args: %s" % ",".join(*args))
        else:
            log.msg("TWISTAR args: %s" % ",".join(args))
    elif len(kwargs) > 0:
        log.msg("TWISTAR kargs: %s" % str(kwargs))

[Brian Muller]

Fixed by #77