Re: How to edit dexterity types without needing to know about their behaviors

ajung wrote
> 
> johannes raggam wrote
>> 
>> i'll fix that, probably at the wine and beer sprint. but then you'll
>> still always get UTC datetime values instead of localized ones, if you
>> get the start/end attributes directly from the context.
>> 
>>> Consistency-is-king
>>> Andreas
>> 
>> pragmatism is okay.
>> johannes

Here are the facts why plone.app.event currently freaks me out.

The source 'start' object is 
v = DateTime('2008/09/09 09:00:00 GMT+2') 
which translates to 07:00 UTC.

The migration code tries to concert the DateTime instance to a Python
datetime instance with UTC timezone and setting the 'timezone' of the event
object to 'Etc/GMT+2' using

                    v = v.asdatetime()
                    tz = str(v.tzinfo)
                    if tz.startswith('GMT'):
                        tz = 'Etc/%s' % tz
                    new_obj.timezone = tz
                    acc = IEventAccessor(new_obj)
                    v = v.replace(tzinfo=pytz.timezone('UTC')) 
                    setattr(acc, k, v)

After the migration the event show up in Plone with 

09.09.2008 um 07:00 bis 10.09.2008 um 15:00 (Etc/GMT+2 / UTC-200)
^^^^^^^^^^^^^^^^^^^^

Taking the debugger:

>>> ev = app.restrictedTraverse('eteaching/news/tagungen/ilias_2008/')
>>> ev.start
datetime.datetime(2008, 9, 9, 9, 0,
tzinfo=<plone.app.event.dx.behaviors.FakeZone object at 0xa7c1250>)
>>> ev = app.restrictedTraverse('eteaching/news/tagungen/ilias_2008/')
>>> ev.timezone
'Etc/GMT+2'
>>> ev.start
datetime.datetime(2008, 9, 9, 9, 0,
tzinfo=<plone.app.event.dx.behaviors.FakeZone object at 0xa7c1250>)
>>> ev.start.tzinfo 
<plone.app.event.dx.behaviors.FakeZone object at 0xa7c1250>
>>> ev.start.tzinfo.tzname(ev.start)
'FAKEZONE'

That the hell is a FAKEZONE?

Obviously my code is wrong because it does not change the 'hour' from 9 to 7
(because of the two hours offset).

So I changed the code to

    v = v.astimezone(pytz.utc)

In this case the output changed to 

09.09.2008 um 05:00 ...
^^^^^^^^^^^^^^^^^^^^

...which is even more weird.

-aj




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