44 lines
1.5 KiB
Python
44 lines
1.5 KiB
Python
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import datetime
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from django.conf import settings
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from django.utils import formats, timezone
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from django.utils.dateparse import parse_datetime
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def ensure_utc(value):
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"""
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Similar to how django-modelcluster stores the revision's data and similar to how
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django stores dates in the database, this converts the date to UTC if required.
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"""
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# https://github.com/wagtail/django-modelcluster/blob/8666f16eaf23ca98afc160b0a4729864411c0563/modelcluster/models.py#L21-L28
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if settings.USE_TZ:
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if timezone.is_naive(value):
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default_timezone = timezone.get_default_timezone()
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value = timezone.make_aware(value, default_timezone).astimezone(
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datetime.timezone.utc
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)
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else:
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# convert to UTC
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value = timezone.localtime(value, datetime.timezone.utc)
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return value
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def parse_datetime_localized(date_string):
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"""
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Uses Django's parse_datetime(), but ensures to return an aware datetime.
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"""
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dt = parse_datetime(date_string)
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if settings.USE_TZ and timezone.is_naive(dt):
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dt = timezone.make_aware(dt, timezone=timezone.get_default_timezone())
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return dt
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def render_timestamp(timestamp):
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"""
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Helper function to format a possibly-timezone-aware datetime into the format
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used by Django (e.g. in templates).
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"""
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if timezone.is_aware(timestamp):
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timestamp = timezone.localtime(timestamp)
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return formats.date_format(timestamp, "DATETIME_FORMAT")
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