[ZPatterns] _v_dm_ KeyError calling get_transaction().abort()

Mon, 8 Oct 2001 12:11:33 +1000

Hi Steve,

Thanks! Wild guess it may be, but it seems to be accurate. I changed 
the code to:

             method = getattr(self, 'edit.html')
             get_transaction().abort()
             html = method(self, REQUEST, errors=errors)
             raise FormError, html

Now the getattr() works, but the html = method() call doesn't, for 
the same reason, except that I now get a TAL error:

     Error Type: Undefined
     Error Value: "_v_dm_" not found in "here/master.html/macros/master"

So I'm still stuck. I need to roll back the transaction before I 
render the html method (or in this case, PT), because otherwise the 
method shows false attributes...

Any ideas how to get around this?

Steve Spicklemire wrote:

>Hi Itai,
>
>	Just a wild guess. Maybe aborting the transaction clears out 
>changes to both persistent and non-persistent attributes? (i.e., 
>_v_dm, the DataSkin's Data Manager). Have you tried reversing the 
>order of the getattr call and the abort?
>
>-steve
>
>On Sunday, October 7, 2001, at 08:31 PM, Itai Tavor wrote:
>
>>Hi,
>>
>>I have a method of a DataSkin object that looks something like this:
>>
>>     def editMe(self, REQUEST, RESPONSE):
>>         """ Edit object for customer """
>>         ...
>>         ...
>>         if errors.has_any():
>>             get_transaction().abort()
>>             html = getattr(self, 'edit.html')(self, REQUEST, errors=errors)
>>             raise FormError, html
>>
>>
>>The html = getattr() line causes the following exception. If I 
>>remove the abort() line, this does not happen. Using Zope 2.3.2, 
>>ZPatterns 0.4.3p2. I never had to abort transactions before, so I 
>>might be doing something bad... but I can't see what it might be. 
>>Any ideas?
>>
>>
>>Error Type: KeyError
>>Error Value: _v_dm_
>>
>>Traceback (innermost last):
>>   File /usr/local/zope/2.3.2/lib/python/ZPublisher/Publish.py, line 
>>223, in publish_module
>>   File /usr/local/zope/2.3.2/lib/python/ZPublisher/Publish.py, line 
>>187, in publish
>>   File /usr/local/zope/2.3.2/lib/python/Zope/__init__.py, line 221, 
>>in zpublisher_exception_hook
>>     (Object: 711)
>>   File /usr/local/zope/2.3.2/lib/python/ZPublisher/Publish.py, line 
>>171, in publish
>>   File /usr/local/zope/2.3.2/lib/python/ZPublisher/mapply.py, line 
>>160, in mapply
>>     (Object: editMe)
>>   File /usr/local/zope/2.3.2/lib/python/ZPublisher/Publish.py, line 
>>112, in call_object
>>     (Object: editMe)
>>   File /Users/itai/Z/Main/Products/PrintShop/Item.py, line 113, in editMe
>>     (Object: 711)
>>   File /Users/itai/Z/Main/Products/ZPatterns/DataSkins.py, line 
>>217, in __get_attr__
>>     (Object: 711)
>>KeyError: (see above)
>>
>>
>>-- --
>>Itai Tavor                      -- "Je sautille, donc je suis."    --
>>[email protected]            --               - Kermit the Frog --
>>--                                                                 --
>>-- "If you haven't got your health, you haven't got anything"      --
>>
>>
>>_______________________________________________
>>ZPatterns mailing list
>>[email protected]
>>http://www.eby-sarna.com/mailman/listinfo/zpatterns

-- 
--
Itai Tavor                      -- "Je sautille, donc je suis."    --
[email protected]            --               - Kermit the Frog --
--                                                                 --
-- "If you haven't got your health, you haven't got anything"      --