covert julian date to calander date

[sum abiut]

Hi,

how to you convert from Julian date to a Calender date. I am pulling data from an MSSQL and i what to convert the Julian date to calender date before displaying data on my template.

cheer

[C. Kirby]

I've never used it, but this package appears to be made for converting between Julian and Gregorian dates
https://pypi.python.org/pypi/jdcal

Good Luck

[Erik Cederstrand]

> Den 20. sep. 2016 kl. 01.40 skrev sum abiut <sua...@gmail.com>:
>
> Hi,
> how to you convert from Julian date to a Calender date. I am pulling data from an MSSQL and i what to convert the Julian date to calender date before displaying data on my template.

If I understand your question correctly, that should be easy. Just convert the Julian date to a Python date in your view:

my_date = (datetime.datetime(my_year, 1, 1) + datetime.timedelta(days=julian_day)).date()


Erik

[sum abiut]

Thanks Erik,

i think that should do the trick.is there a way to covert the date column straight from the sql query or from the template?

cheers

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[Erik Cederstrand]

> Den 21. sep. 2016 kl. 02.41 skrev sum abiut <sua...@gmail.com>:
>
> Thanks Erik,
>
> i think that should do the trick.is there a way to covert the date column straight from the sql query or from the template?

If you want to do this from the template, create a custom template tag: https://docs.djangoproject.com/en/1.10/howto/custom-template-tags/

I don't have experience with MSSQL, but if you want to convert the date server-side, this should work: http://blogs.msmvps.com/robfarley/2009/03/25/converting-to-and-from-julian-format-in-t-sql/ You could add the custom SQL as a RawSQL: https://docs.djangoproject.com/el/1.10/ref/models/expressions/#django.db.models.expressions.RawSQL

Depending on how your data is represented, you could also solve this with a custom model field: https://docs.djangoproject.com/en/1.10/howto/custom-model-fields/ The conversion code should go in the from_db_value() method.

Erik