def create_visit(self,
product,
start=datetime.utcnow(),
end=datetime.utcnow() + timedelta(hours=1),
workflow_status=Visit.WORKFLOW_STATUS_BEING_PLANNED):
visit = Visit(workflow_status=workflow_status)
visit.save()
eventtime = EventTime(product=product,
visit=visit,
start=pytz.utc.localize(start),
end=pytz.utc.localize(end))
eventtime.save()
return visit
