home
join about login
We love sports

Robot

Sept. 21, 2018, 11:46 p.m.

Equestrian-Ward rides to rescue as U.S. win team jumping gold

McLain Ward delivered a pressure packed clean ride to clinch the show jumping team gold for the United States in a dramatic jump off with Sweden at FEI World Equestrian Games on Friday after the two nations finished the ...

319 views origin
Little Planet Soyuz - Noel Guarany | Sem Fronteira (1975) [Álbum Completo/Full Album] - casados - Exclusive: North Korea earned $200 million from banned exports, s - Tonella - revisão do limpador de parabrisa do fusca - Wozniacki passes Barty test in Madrid, Sharapova advances - amizades - Climate change: 'Hothouse Earth' risks even if CO2 emissions slas - Trump quip about North Korea's Kim sparks outcry on social media - The Extraordinary Spiral in LL Pegasi - Orion in Red and Blue - NASA Awards Contract for Aerospace Systems Modeling, Simulation - Launching to Observe Our Sun - GLORIA GROOVE - SEDANAPO - Cetus Galaxies and Supernova - Los candidatos se disputan el poderoso voto del magisterio mexica - gliptodonte encontrado en Picada Varela - Major League Baseball notebook: Mariners deal for Colome, Span fr - NASA Awards Contract for Continued Operations of its Jet Propulsi - This is how to train a cat :D How I Trained My Cat - Austria plans tougher sentences for crimes against women - Pipi das Meias Altas Portuguese vol 1 - Eu vi eu viiiii O papai noel tava na sinaleira - Fallece un exdiputado federal del PRI tiroteado este fin de seman - Slava Ukraini! on Steam - Eclipse solar hoje! - At Tranquility Base - Dieguito - A Lesma © ℗ MÚSICA AUTORAL Ensaio - Guri de Uruguaiana fala sobre hits do Carnaval e exageros no Phot - Federer pummels Bemelmans to move closer to top spot - Southern California as Seen From Apollo 7 - Celebrating 28 Years of the Hubble Space Telescope -  

tutti - social network

Tutti is the simplest social network on internet. Here you can make friends, create communities, sell things, make surveys, comment and share stuff.

probably a phalotris, she's now safe, returned back to nature
image
Django tips and tricks

As far as I know there is no way for the browser to tell the application what is the user's timezone.
That is a problem when you want to run an international site, mostly when users from different places save time related stuff.
Some people suggest to just ask the user what his timezone is.
I did not want to bother them with that, so I created this little hack.
this involves a context processor and some javascript.

So lets start with the context processor in django.
you start by writing your context_processor.py file
 from django.utils import timezone
def timezone_processor(request):
# look for a cookie that we expect to have the timezone
tz = request.COOKIES.get('local_timezone', None)
if tz:
tz_int = int(tz) # cast to int
# here we decide what will prefix timezone number
# the output of tz_str will be something like:
# Etc/GMT+1, GMT+0, Etc/GMT-2
if tz_int >= 0:
tz_str = 'Etc/GMT+'+tz
else:
tz_str = 'Etc/GMT'+tz
# this forces timezone
timezone.activate(tz_str)
# Now we tell the template that we have a timezone
return {'local_timezone': tz}

For the context processor to work you must declare it in settings.py
 TEMPLATES = [
{
.........
'OPTIONS': {
'context_processors': [
.........
'myapp.context_processors.timezone_processor',
],
},

Ok, so this code just create a timezone string and activates it.
A template context processor returns a dictionary that will be sent to the context of the template when rendering. Here we are returning local_timezone.
But where this cookie come from? Lets go to the template and make this javascript trick.

 <!-- if django already knows timezone we will not run it again -->
{% if not local_timezone %}
<!-- getTimezoneOffset does the trick! -->
<!-- it return minutes so we divide to get hours -->
timezone = new Date().getTimezoneOffset() / 60;
document.cookie = 'local_timezone=" + timezone;
<!-- set a cookie with this value and we are done -->
{% endif %}
*for simplicity I didn't include cookie expires nor half hour timezones like North Korea.

So it's first time the user enters the site. Django doesn't know yet it's timezone.
As local_timezone comes empty, we run this javascript lines, get the timezone offset and save it in a cookie.

Next page the user enters, the context processor will read that cookie and will activate the appropriate timezone.
If you need to activate it the very first time, just make it refresh after setting the cookie.

Well that's it, hope this helps you.
more