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

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Johannes Raggam wrote:
> On Fri, 2014-03-14 at 11:45 +0100, Wichert Akkerman wrote:
>> On 14 Mar 2014, at 11:02, Johannes Raggam <[email protected]>
>> wrote:
>> 
>>> On Fri, 2014-03-14 at 10:18 +0100, Wichert Akkerman wrote:
>>>> On 14 Mar 2014, at 09:40, ajung <[email protected]> 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
>>>>> I don't care about localized datetime values. Dates should 
>>>>> always be stored and manipulated using UTC in the same way as
>>>>> any we should deal (in theory) with unicode strings
>>>>> internally. Localized datetime values and utf-8 encoded 
>>>>> strings are value for presentation purposes, not for
>>>>> processing purposes.
>>>> +infinity
>>> read my mail and the code and you will see that datetimes are
>>> stored in UTC.
>>> 
>> 
>> Looking at the code you store with a fake timezone, which sounds
>> just as bad if not worse. I strongly suggest to use date time
>> instances without any tzone in UTC, and only add a timezone and
>> convert as necessary on display/edit.
> 
> the fakezone is removed in the data_postprocessing step and the
> value converted to UTC.
> 
> it was necessary to let z3c.form compare a floating-timezone value
> from the widget to a possibly timezone aware value (UTC), already
> stored on the content object.
> 
> looks like your're not carefully reading mails. or i'm not clear
> enough.

Possibly - because requirements for setting start and end dates are
crazy.  Not only that you need the IEventBasic adapter, you also
need to call an event subscriber...but I will now stfu...I hope you all
got my point that one can one design and implement a Dexterity backend
API this way.

- -aj
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