django-timezone-field

A Django app providing database, form and serializer fields for pytz timezone objects.

Examples

Database Field

import pytz
from django.db import models
from timezone_field import TimeZoneField

class MyModel(models.Model):
    tz1 = TimeZoneField(default='Europe/London')            # defaults supported
    tz2 = TimeZoneField()                                   # in ModelForm displays like "America/Los Angeles"
    tz3 = TimeZoneField(choices_display='WITH_GMT_OFFSET')  # in ModelForm displays like "GMT-08:00 America/Los Angeles"

my_model = MyModel(
    tz1='America/Los_Angeles',    # assignment of a string
    tz2=pytz.timezone('Turkey'),  # assignment of a pytz.DstTzInfo
    tz3=pytz.UTC,                 # assignment of pytz.UTC singleton
)
my_model.full_clean() # validates against pytz.common_timezones by default
my_model.save()       # values stored in DB as strings
my_model.tz1          # values retrieved as pytz objects: <DstTzInfo 'America/Los_Angeles' PST-1 day, 16:00:00 STD>

Form Field

from django import forms
from timezone_field import TimeZoneFormField

class MyForm(forms.Form):
    tz = TimeZoneFormField()                                    # displays like "America/Los Angeles"
    tz2 = TimeZoneFormField(choices_display='WITH_GMT_OFFSET')  # displays like "GMT-08:00 America/Los Angeles"

my_form = MyForm({'tz': 'America/Los_Angeles'})
my_form.full_clean()        # validates against pytz.common_timezones by default
my_form.cleaned_data['tz']  # values retrieved as pytz objects: <DstTzInfo 'America/Los_Angeles' PST-1 day, 16:00:00 STD>

REST Framework Serializer Field

import pytz
from rest_framework import serializers
from timezone_field.rest_framework import TimeZoneSerializerField

class MySerializer(serializers.Serializer):
    tz1 = TimeZoneSerializerField()
    tz2 = TimeZoneSerializerField()

my_serializer = MySerializer(data={
    'tz1': 'America/Argentina/Buenos_Aires',
    'tz2': pytz.timezone('America/Argentina/Buenos_Aires'),
})
my_serializer.is_valid()            # true
my_serializer.validated_data['tz1'] # <DstTzInfo 'America/Argentina/Buenos_Aires' LMT-1 day, 20:06:00 STD>
my_serializer.validated_data['tz2'] # <DstTzInfo 'America/Argentina/Buenos_Aires' LMT-1 day, 20:06:00 STD>

Installation

1. Install from pypi

   pip install django-timezone-field
   

2. Add timezone_field to your django project's settings.INSTALLED_APPS

   INSTALLED_APPS = [..., 'timezone_field', ...]
   

Running the tests

From the repository root, with poetry

poetry install
poetry run pytest

Changelog

4.2.1 (2021-07-07)

• Reinstate TimeZoneField.default_choices (#76)

4.2 (2021-07-07)

• Officially support for django 3.2, python 3.9
• Fix bug with field deconstruction (#74)
• Housekeeping: use poetry, github actions, pytest

4.1.2 (2021-03-17)

• Avoid NonExistentTimeError during DST transition (#70)

4.1.1 (2020-11-28)

• Don't import rest_framework from package root (#67)

4.1 (2020-11-28)

• Add Django REST Framework serializer field
• Add new choices_display kwarg with supported values WITH_GMT_OFFSET and STANDARD
• Deprecate display_GMT_offset kwarg

4.0 (2019-12-03)

• Add support for django 3.0, python 3.8
• Drop support for django 1.11, 2.0, 2.1, python 2.7, 3.4

3.1 (2019-10-02)

• Officially support django 2.2 (already worked)
• Add option to display TZ offsets in form field (#46)

3.0 (2018-09-15)

• Support django 1.11, 2.0, 2.1
• Add support for python 3.7
• Change default human-readable timezone names to exclude underscores (#32 & #37)

2.1 (2018-03-01)

• Add support for django 1.10, 1.11
• Add support for python 3.6
• Add wheel support
• Support bytes in DB fields (#38 & #39)

2.0 (2016-01-31)

• Drop support for django 1.7, add support for django 1.9
• Drop support for python 3.2, 3.3, add support for python 3.5
• Remove tests from source distribution

1.3 (2015-10-12)

• Drop support for django 1.6, add support for django 1.8
• Various bug fixes

1.2 (2015-02-05)

• For form field, changed default list of accepted timezones from pytz.all_timezones to pytz.common_timezones, to match DB field behavior.

1.1 (2014-10-05)

• Django 1.7 compatibility
• Added support for formatting choices kwarg as [[<str>, <str>], ...], in addition to previous format of [[<pytz.timezone>, <str>], ...].
• Changed default list of accepted timezones from pytz.all_timezones to pytz.common_timezones. If you have timezones in your DB that are in pytz.all_timezones but not in pytz.common_timezones, this is a backward-incompatible change. Old behavior can be restored by specifying choices=[(tz, tz) for tz in pytz.all_timezones] in your model definition.

1.0 (2013-08-04)

• Initial release as timezone_field.

Credits

Originally adapted from Brian Rosner's django-timezones.

Made possible thanks to the work of the contributors.