On Thu, Dec 24, 2009 at 6:32 PM, MRAB <pyt...@mrabarnett.plus.com> wrote:
> Victor Subervi wrote: > > On Thu, Dec 24, 2009 at 3:28 PM, MRAB <pyt...@mrabarnett.plus.com<mailto: >> pyt...@mrabarnett.plus.com>> wrote: >> >> Victor Subervi wrote: >> >> Hi; >> I have the following code: >> >> try: >> trueVal = form.getlist(storeColNames[i]) >> colNames.append(storeColNames[i]) >> if len(trueVal) > 1: >> trueVal = string.join(trueVal, ',') >> >> >> Unless you're using a very old version of Python, you should be using >> the string method: >> >> trueVal = ','.join(trueVal) >> >> >> values.append(trueVal) >> elif len(trueVal) == 1: >> print storeColNames[i], trueVal, '<br />' >> trueVal = '%s' % trueVal[0] >> values.append(trueVal) >> if len(trueVal) > 0: >> sql = '%s="%s"' % (storeColNames[i], trueVal) >> sqlUpdate.append(sql) >> except: >> raise >> >> This works fine except when storeColNames[i] returns no data. >> Now, if I were dealing with getfirst instead of getlist, I could >> easily put in a nonsense default data value such as '%$#' and >> check for that. But how can I do that or something similar (and >> preferably more elegant) with getlist, which takes only the one >> name parameter? >> >> You just need to check whether len(trueVal) == 0. Simple. >> >> >> The problem is that it doesn't see the value at all >> >> trueVal = form.getlist(storeColNames[i]) >> test = ','.join(trueVal) >> if len(test) == 0: >> trueVal == '' >> It simply doesn't register storeColNames[i] if there is nothing provided >> from the referring page. Here's a test printout: >> >> [snip] > > You can see from the above part with breaks that "Availability" isn't >> logged. But it is in the insert statement...without a value, which throws an >> error. The complete code follows: >> >> [snip] > Try working through the code by hand for that value. Well I've done that. What happens is the storeColNames registers the "Availability" field naturally enough; however, as I stated before, the getlist doesn't fetch anything because there is nothing to fetch! No such value is passed! So, what I need to do is figure out a way to log the fact that no value is fetched. What I have currently, unfortunately, simply ignores the unfetchable value. As I stated before, I need to log the fact that no such value is obtained. Please...how do I do that?? TIA, beno
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