We Keep Coding

How to set Postgres Datetime field into Odoo Datetime field

I am trying to display set time of Postgres database time to datetime field into Odoo.
I am creating field is that to set the time.
last_modify_article = fields.Datetime("Last Modify Date")
But my DateTime :~ 2017-08-28T08:43:56+0200 is perfectly stored in Postgres database but in Odoo saw in different.
So, my question is that how can I manage the database date-time in the field.
Here is the Postgres Time
And
Here is Odoo field to set datetime in UTC

Actually the database stores the Datetime field according to the system timezone. In Odoo, views which will be automatically converted according to the user's timezone if it is set.
On your images, I can see the time difference id +5:30 ie, Asia/Kolakata timezone. So your custom operations on Datetime field need the proper conversion of Timezone according to the user.
Odoo views and ORM methods are treated the tz with moment.js and the pytz conversions. This is actually a good feature to manage different timezones in Odoo.
You can use astimezone on Datetime objects:
def astimezone(self, tz): # known case of datetime.datetime.astimezone
""" tz -> convert to local time in new timezone tz """
return datetime(1, 1, 1)
or
fields.Datetime.context_timestamp(self, datetime.strptime(value, DEFAULT_SERVER_DATETIME_FORMAT))

Odoo is designed to have the date and time stored as UTC in the database and convert it to the user's timezone on the front-end.
What time zone is set for your user? You can click your name in the top right, then Preferences. Time zone should be shown on the popup form.

You can use pytz library to convert datetime based on user's timezone. See the code sample.
import pytz
import datetime
def current_user_datetime(self):
currenttimezone = pytz.timezone(self.env.context.get('tz'))
user_datetime = datetime.datetime.now(currenttimezone)
self.timefield = user_datetime

How do I format a datetime to localtime in Django?

I want to format a datetime to the user's localtime. I do not want to do it in a template though, I want to do it in the .py file and pass it to the template for display as is. What facility do the template code use to do this? Can I get at this from my .py file?

You need to start using Django's Time Zones:
set USE_TZ to True
install pytz module (recommended)
set the default TIME_ZONE
Then, in order to make time-zone-aware datetimes, you need to somehow determine the user's timezone. The most reliable way would be to let the user choose the timezone and remember the choice for every user. Then, in the view activate the specific user's timezone:
import pytz
from django.utils import timezone
tzname = request.session.get('django_timezone') # or wherever you store the user's timezone
if tzname:
timezone.activate(pytz.timezone(tzname))
else:
timezone.deactivate()
print timezone.now()
Also see:
Selecting the current time zone (has the view-to-template example)
When should I activate/deactivate the current timezone in Django (1.4)?
How do I get the visitor's current timezone then convert timezone.now() to string of the local time in Django 1.4?
Hope that helps.

Converting timezone in in Python (Django) adding a mysterious 30 minutes

I have a datetime object that is set to 2014-02-24 19:00:00+00:00 and I believe this is set as UTC by default (through the Django admin panel).
This time is actually Africa/Johannesburg, so I convert it like this:
local_timezone= pytz.timezone("Africa/Johannesburg")
local_time_start = self.start_time_unix.replace(tzinfo=local_timezone)
This will now output 2014-02-24 19:00:00+01:30
Now I want to store this as the converted UTC timezone, so I do it like this:
utc_time = local_time_start.astimezone(utc)
For some reason, this outputs 2014-02-24 17:30:00+00:00. The time is should output is 17:00:00 so where is the extra 30 mins coming from?
Basically I am trying to take the given input from the django admin panel as the local timezone of the models time_zone field, but store it as UTC.
Is there a better way I can approach this? The Django docs explain how to convert the users local timezone but I need to convert it based on the timezone in the models attributes.

Don't use datetime.replace() with pytz timezones. The pytz timezones contain historical timezone data (to allow for dates in the past to use the right offsets from UTC), but datetime.replace() cannot use the correct information in that case.
Use the timezone.localize() method instead:
local_timezone = pytz.timezone("Africa/Johannesburg")
local_time_start = local_timezone.localize(self.start_time_unix)
See the pytz documentation.
Use this only on non-timezone-aware objects. For timezone aware datetime values, use datetime.astimezone() to translate value from one timezone to another:
local_timezone = pytz.timezone("Africa/Johannesburg")
local_time_start = self.start_time_unix.astimezone(local_timezone)
If you have a datetime value that has the wrong timezone attached (it should represent the given time in a different timezone, not a different time in that timezone), remove the old timezone first using .replace(tzinfo=None), then usetimezone.localize()`:
local_timezone = pytz.timezone("Africa/Johannesburg")
local_time_start = local_timezone.localize(self.start_time_unix.replace(tzinfo=None))

How to get user's local timezone other than server timezone(UTC) in python?

In OpenERP, when I try to print the current date and time, it always print the 'UTC' time. But I want to get time in the user timezone . Each user have different timezone.For example 'CST6CDT', 'US/Pacific' or 'Asia/Calcutta'. So I need to get time in user timezone so that I can show the correct datetime in the report. I have tried to change the timezone using localize() and replace() function in datatime module. But I didn't get the correct output.

Got it.
from datetime import datetime
from pytz import timezone
fmt = "%Y-%m-%d %H:%M:%S"
# Current time in UTC
now_utc = datetime.now(timezone('UTC'))
print now_utc.strftime(fmt)
# Convert to US/Pacific time zone
now_pacific = now_utc.astimezone(timezone('US/Pacific'))
print now_pacific.strftime(fmt)
# Convert to Europe/Berlin time zone
now_berlin = now_pacific.astimezone(timezone('Europe/Berlin'))
print now_berlin.strftime(fmt)
Courtesy: http://www.saltycrane.com/blog/2009/05/converting-time-zones-datetime-objects-python/

As of OpenERP 6.1 the timezone of all Python operations happening on the server-side (and in modules) is forced to be UTC. This was a design decision explained in various places [1]. The rendering of datetime values in the user's timezone is meant to be done on the client-side exclusively.
There are very few cases where it makes sense to use the user's timezone instead of UTC on the server-side, but indeed printing datetime values inside reports is one of them, because the client-side will have no chance to convert the contents of the resulting report.
That's why the report engine provides a utility method for doing so: the formatLang() method that is provided in the context of reports (RML-based ones at least) will format the date according to the timezone of the user if you call it with a datetime value and with date_time=True (it uses the tz context variable passed in RPC calls and based on the user's timezone preferences)
You can find example of how this is used in the official addons, for example in the delivery module (l.171).
Have a look at the implementation of formatLang() if you want to know how it actually does the conversion.
[1]: See the OpenERP 6.1 release notes, this other question, as well as comment #4 on bug 918257 or bug 925361.

from: http://help.openerp.com/question/30906/how-to-get-users-timezone-for-python/
DATETIME_FORMAT = "%Y-%m-%d %H:%M:%S"
import pytz
from openerp import SUPERUSER_ID
# get user's timezone
user_pool = self.pool.get('res.users')
user = user_pool.browse(cr, SUPERUSER_ID, uid)
tz = pytz.timezone(user.context_tz) or pytz.utc
# get localized dates
localized_datetime = pytz.utc.localize(datetime.datetime.strptime(utc_datetime,DATETIME_FORMAT)).astimezone(tz)

DateInUTC = <~ Time variable to convert
To convert to user's timezone:
LocalizedDate = fields.datetime.context_timestamp(cr, uid, DateInUTC, context=context)
To remove the offset:
LocalizedDate = LocalizedDate.replace(tzinfo=None)

Python Django: Time Zone Conversion

I'm parsing an XML file that has the dates in GMT time. It's my first time working with timezones so I'm having some difficulty displaying the right time. In the XML file the date is like this.
2015-06-29 23:05
I set up my model with a basic datetime field like this:
date = models.DateTimeField()
...my settings.py has:
USE_TZ = True
TIME_ZONE = 'America/Toronto'
However when I display the time via views it shows 3:05. Not exactly sure what I'm suppost to do next.

Well, there is no way to determine the time zone of the date time you provided. If you know that it is always GMT, then convert from GMT to your local time zone which is "America/Toronto" in your case.
If possible, I'd recommend changing the date format in your XML. Use UTC, as it provides time zone info.
Check this link out: Python - Convert UTC datetime string to local datetime
Readings I recommend for dealing with time.
UTC: http://www.w3.org/TR/NOTE-datetime
Django Time Zone Docs: https://docs.djangoproject.com/en/1.8/topics/i18n/timezones/