def _save_translation(entity, locale, translation, author=""):
"""Admin interface: save new or update existing translation in DB."""
translations = Translation.objects.filter(entity=entity, locale=locale).order_by("date")
if len(translations) == 0: # New translation
t = Translation(entity=entity, locale=locale, string=translation, author=author, date=datetime.datetime.now())
else: # Update translation
t = translations.reverse()[0]
t.string = translation
t.author = author
t.date = datetime.datetime.now()
t.save()
