I did scour the archives before asking - all roads lead to the same
unanswered question... How is an EOF attribute like " serverTimeZone = GMT;"
set?
on 5/15/06 15:01, Ken Anderson at [EMAIL PROTECTED] wrote:
> It really doesn't have to be traumatic :)
>
> You can search through the mailing list - there have been numerous
> discussions in the past. What's important is that the timezone
> you're using consistent.
>
> Most importantly, EOF has an attribute that I always set on attributes:
>
> serverTimeZone = GMT;
>
> I'm not sure what this defaults to anymore, but I find it useful to
> make sure EOF is always looking at dates as being in GMT. Also, if
> there's something that I always want to be a date, I use this code:
>
> GregorianCalendar cal = new GregorianCalendar();
> cal.setTime(sourceDateTime);
> int year = cal.get(GregorianCalendar.YEAR);
> int dayOfMonth = cal.get(GregorianCalendar.DAY_OF_MONTH);
> int month = cal.get(GregorianCalendar.MONTH);
> NSTimestamp outputDate = new NSTimestamp(year, month+1,
> dayOfMonth, 0, 0, 0, TimeZone.getTimeZone("GMT"));
>
>
> I make sure that be default, the entire WO app is thinking in GMT:
>
> TimeZone.setDefault(TimeZone.getTimeZone("GMT"));
> NSTimeZone.setDefault(TimeZone.getTimeZone("GMT"));
>
> Lastly, if I'm doing something where users need to see dates and
> times, I always like them to see the date and time in their own time
> zone. To do that, I have some javascript that determines the time
> zone of the user's computer:
>
> var msie = navigator.userAgent.indexOf("MSIE");
> var now = new Date();
> var clientTimeZoneOffset = now.getTimezoneOffset(); // = what browser
> thinks is TZ; but
> // MS IE version 3 gives wrong sign of TZ
> // MSIE 4.0b2 shifts TZ by -1 hour
> // Any other problems?
>
> if (clientTimeZoneOffset) {
> if (msie > -1) {
> if (navigator.userAgent.substring(msie+5,msie+6) <= 3) {
> clientTimeZoneOffset *= -1;
> } else {
> if (navigator.userAgent.indexOf("4.0b2") > -1) {
> clientTimeZoneOffset += 60;
> }
> }
> }
> document.write('<input type="hidden" name="x-clientTimeZoneOffset"
> value="' + clientTimeZoneOffset * 60 * -1 + '" />');
> }
>
> and places a new element in the header. I put this javascript on an
> early page, like the login page. I then grab the header and set a
> formatter in the user's session for their own time zone.
>
> I realize there are some serious machinations here, but all in all,
> it works and people can use the site from anywhere on the planet and
> see the right time.
>
> Ken
>
>
>
> On May 15, 2006, at 5:39 PM, WebObjects wrote:
>
>> YUCK! Are you saying that if a user is entering a date that I have to
>> relate what time zone my server is in, vs. GMT, and ensure that it
>> always
>> corresponds? This does sound nasty.
>>
>> Just to be certain I understand... If I submit a date, and 'today'
>> isn't
>> the same day as it is in 'GMT', then my submission will be adjusted
>> accordingly, UNLESS I send GMT along with it?
>>
>> Why do I feel like I just confused myself? And why do I editorialize?
>>
>> -Bill
>>
>>
>> on 5/15/06 14:32, Art Isbell at [EMAIL PROTECTED] wrote:
>>
>>> On May 15, 2006, at 11:25 AM, WebObjects wrote:
>>>
>>>> I output the date it's sending to the EC to save, and get
>>>> "1919-02-24
>>>> 08:00:00 Etc/GMT" - showing 'GMT' as the timezone. I'm in Los
>>>> Angeles - a
>>>> far way from the GMT.
>>>
>>> 1919-02-24 08:00:00 Etc/GMT may have been 1919-02-23 in PST assuming
>>> that PST existed in 1919. Dates and time zones are such nasty
>>> concepts, especially in the distant past. Because the JDBC version
>>> used by EOF doesn't support a "datetime with timezone" data type, all
>>> datetime values are stored in GMT. So you'll need to decide how you
>>> want to display dates and do the time zone adjustments yourself.
>>>
>>> Aloha,
>>> Art
>>>
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>>
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