Thanks for the heads-up!! Switching over to datetime as we speak (and working pretty good!!!)
Best, Julian On Sunday, October 25, 2015 at 6:29:24 PM UTC-5, Anthony wrote: > > FYI, we're going to remove the timezone option from IS_DATE (which doesn't > work anyway), so you're better off using a datetime field and setting the > time to midnight. > > Anthony > > On Sunday, October 25, 2015 at 12:02:48 PM UTC-4, Julian Sanchez wrote: >> >> Thanks Anthony, great insight. >> >> Most data is user-generated so the intent is to imply midnight at the >> user's timezone, translate to UTC for storage, then apply the user's >> timezone when displaying/editing. Can certainly switch to datetime field >> and zero out the time. >> >> Cheers, >> Julian >> >> On Sunday, October 25, 2015 at 8:38:12 AM UTC-5, Anthony wrote: >>> >>> It appears to be a bug in the IS_DATE validator -- the code expects the >>> date object to have a tzinfo attribute, but only datetime and time objects >>> have that attribute. >>> >>> More generally, it is not clear how one should apply transformations to >>> dates based on timezones. If you know the date in UTC time, how can you >>> tell what the date should be in another timezone without knowing the >>> *time* in UTC as well? For example, if you have the date 2015-10-25 in >>> UTC, what is the date in the "America/Chicago" timezone? It would be >>> 2015-10-25 if the UTC time is after 5:00am, but 2015-10-24 if the UTC time >>> is before 5:00am. If you want to make such a transformation, you would have >>> to pick a particular time of day (either in the local timezone or UTC), >>> such as midnight -- but then you should probably be storing datetimes, not >>> simply dates. >>> >>> Anthony >>> >>> On Sunday, October 25, 2015 at 8:54:40 AM UTC-4, Julian Sanchez wrote: >>>> >>>> I'm developing an application that will have users from different time >>>> zones. The intent is to store everything in UTC and translate to user's >>>> timezone at display/edit time. I started working on my own solution when >>>> I >>>> came across this post >>>> <https://groups.google.com/forum/#!searchin/web2py/IS_DATE$20timezone/web2py/jIEUIb8wxtg/rWe5g-IhCwAJ>which >>>> >>>> seems to indicate that if you specify a timezone parameter to the >>>> IS_DATE() >>>> validator web2py will do all the timezone translation for you. >>>> >>>> However every time I specify the timezone parameter to IS_DATE() I will >>>> get no dates validated no matter what >>>> >>>> Without specifying a timezone it obviously works: >>>> def test_date(): >>>> db.define_table('test_table',Field('usr_comment'),Field( >>>> 'comment_date',requires=IS_DATE('%Y-%m-%d'))) >>>> form =SQLFORM.grid(db.test_table, create=True,editable=True, >>>> user_signature=False) >>>> return dict(form=form) >>>> >>>> >>>> However this: >>>> def test_date(): >>>> db.define_table('test_table', Field('usr_comment'), Field( >>>> 'comment_date', requires=IS_DATE('%Y-%m-%d', timezone='America/Chicago' >>>> ))) >>>> form = SQLFORM.grid(db.test_table, create=True, editable=True, >>>> user_signature=False) >>>> return dict(form=form) >>>> >>>> or even this: >>>> def test_date(): >>>> from pytz import timezone >>>> mytz = timezone('America/Chicago') >>>> db.define_table('test_table', Field('usr_comment'),Field( >>>> 'comment_date',requires=IS_DATE('%Y-%m-%d', timezone=mytz))) >>>> form=SQLFORM.grid(db.test_table, create=True, editable=True, >>>> user_signature=False) >>>> return dict(form=form) >>>> >>>> Always tells me "Enter date as 1963-08-28" when submitting the form and >>>> never allows me to add/edit values (of course I'm entering dates as >>>> 2015-10-25). >>>> >>>> Am I missing something or is there a bug with IS_DATE and timezone >>>> handling? >>>> >>>> Thanks, >>>> Julian >>>> >>> -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
