[Baypiggies] Google App Engine | Data Store | Interval Data type

[Guido van Rossum]

I'd store this as an int (or float) expressed in seconds. It's trivial
to convert that to a datetime.timedelta instance.

On Wed, Apr 9, 2008 at 11:56 AM, Glen Jarvis <glen at glenjarvis.com> wrote:
>
> In trying to port my application to Google's App Engine, I got stuck trying
> to port my data to the Data store. I need an 'interval' data type. Example
> data points include  "3 hours, 2 minutes and 13 seconds"  and "0 hours, 45
> minutes and 15 seconds." (not stored as string, of course, but as a time
> interval).
>
> The only types I can find in the AppEngine is below. I'm certain there is a
> method of storing such a thing. My source data has start_time and interval,
> so I can't subtract end_time and start_time and store the result as a time
> of that length (which sounds very hackish).
>
>
> Has anyone run into this yet?
>
>
> DateTimeProperty
> DateProperty
> TimeProperty
> datetime.datetimeChronological
>
> class DateTimeProperty(verbose_name=None, auto_now=False,
> auto_now_add=False, ...)
> A date and time property.
> If auto_now is True, the property value is set to the current time whenever
> the model instance is stored in the datastore, overwriting the property's
> previous value. This is useful for tracking a "last modified" date and time
> for a model instance.
> If auto_now_add is True, the property value is set to the current time the
> first time the model instance is stored in the datastore, unless the
> property has already been assigned a value. This is useful for storing a
> "created" date and time for a model instance.
> Date-time values are stored as and returned using the UTC time zone. See
> datetime.datetime for a discussion of how to manage time zones.
> Value type: datetime.datetime
>
>
> Cheers,
>
>
> Glen
>
> --
> 415-680-3964
> glen at glenjarvis.com
> http://www.glenjarvis.com
>
> "You must be the change you wish to see in the world." -M. Gandhi
>
> On Apr 9, 2008, at 9:51 AM, Glen Jarvis wrote:
>
> Cancel what I said. It was assuming that every session was a repeat all day
> long. Also, I  just reviewed the calendar (below). I should have checked on
> the 'type' of breakout sessions in the schedule. It was silly of me for not
> looking and only assuming it was listed.
>
> Thanks for pointing this out too. Because, the price is actually quite steep
> for me (I wish I were still a student this year). I'd hate to pay that and
> realize that I didn't get the few sessions I wanted (like the datastore
> one).
>
>
>
> Wednesday, May 28th 2008
>
> 8:30 AM
> 9:30 AM
> 11:15 AM - 5:15 PM
> 11:15 AM - 4:00 PM
> 12:00 PM - 2:00 PM
> 6:30 PM - 10:30 PM
>
> Registration
> Keynote
> Breakout sessions
> Code Labs
> Lunch served
> After Hours at Google I/O
> Thursday, May 29th 2008
>
> 8:00 AM
> 9:00 AM - 10:00 AM
> 10:15 AM - 4:15 PM
> 10:15 AM - 4:15 PM
> 11:15 AM - 4:00 PM
> 12:00 PM - 2:00 PM
>
> Breakfast
> General sessions
> Breakout sessions
> Unconference sessions
> Code Labs
> Lunch served
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> On Apr 9, 2008, at 9:30 AM, Glen Jarvis wrote:
> I didn't see which sessions were offered at which times. But, I did
> see a schedule for the day. I would assume that all sessions under the
> 'type' are offered when that 'type' is in the schedule. Does that make
> any sense?
>
>
> Glen
> --
> 415-680-3964
> glen at glenjarvis.com
> http://www.glenjarvis.com
>
> "You must be the change you wish to see in the world." -M. Gandhi
>
>
> On Apr 9, 2008, at 9:13 AM, Eric Walstad wrote:
>
> On Tue, Apr 8, 2008 at 9:55 PM, Glen Jarvis <glen at glenjarvis.com>
> wrote:
>
> I saw an announcement for Google I/O
>
> (http://code.google.com/events/io/).
>
> Is anyone else from BayPIGgies considering attending?
>
> I'm going, schedule permitting.
> Did you find a schedule that shows the session times?  It matters to
> me to be able to verify which sessions happen at the same time.  I
> didn't even see a mapping between their session types and each
> session.  I'd be bummed if I forked out the money and found that all
> my target sessions were happening at the same time.
>
> Anyone from Google listening?
>
> Eric
>
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-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)