Closes #1283: Added a time zone field to the site model

netbox/utilities/api.py

@@ -1,6 +1,7 @@
 from __future__ import unicode_literals
 
 from collections import OrderedDict
+import pytz
 
 from django.conf import settings
 from django.contrib.contenttypes.models import ContentType
@@ -97,6 +98,23 @@ class ContentTypeFieldSerializer(Field):
             raise ValidationError("Invalid content type")
 
 
+class TimeZoneField(Field):
+    """
+    Represent a pytz time zone.
+    """
+
+    def to_representation(self, obj):
+        return obj.zone if obj else None
+
+    def to_internal_value(self, data):
+        if not data:
+            return ""
+        try:
+            return pytz.timezone(str(data))
+        except pytz.exceptions.UnknownTimeZoneError:
+            raise ValidationError('Invalid time zone "{}"'.format(data))
+
+
 #
 # Viewsets
 #

netbox/utilities/templatetags/helpers.py

@@ -1,5 +1,8 @@
 from __future__ import unicode_literals
 
+import datetime
+import pytz
+
 from django import template
 from django.utils.safestring import mark_safe
 from markdown import markdown
@@ -117,6 +120,14 @@ def example_choices(field, arg=3):
     return ', '.join(examples) or 'None'
 
 
+@register.filter()
+def tzoffset(value):
+    """
+    Returns the hour offset of a given time zone using the current time.
+    """
+    return datetime.datetime.now(value).strftime('%z')
+
+
 #
 # Tags
 #