2026-09-15 13:38:01 +08:00
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from datetime import datetime, time, timedelta
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from django.utils import timezone
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from tracker.models import DailyStat, Event, VisitSession, Visitor
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def refresh_daily(site, date) -> DailyStat:
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"""重算某站点某自然日的聚合（幂等，update_or_create）。
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日界取 TIME_ZONE（Asia/Shanghai）自然日：make_aware(datetime.combine(date, time.min))。
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口径：pv/uv 均从事件表统计（排除 is_bot），uv=distinct visitor，与 pv 同源；
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2026-09-15 13:55:13 +08:00
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sessions 按会话 started_at 落入当日且访客非爬虫；new_visitors 按 Visitor.first_seen_at 落入当日（同样排除爬虫访客，四指标口径统一）。
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2026-09-15 13:38:01 +08:00
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"""
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day_start = timezone.make_aware(datetime.combine(date, time.min))
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day_end = day_start + timedelta(days=1)
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pv = Event.objects.filter(site=site, is_bot=False,
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occurred_at__gte=day_start, occurred_at__lt=day_end).count()
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uv = Event.objects.filter(site=site, is_bot=False, occurred_at__gte=day_start,
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occurred_at__lt=day_end).values("visitor").distinct().count()
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sessions = VisitSession.objects.filter(site=site, visitor__is_bot=False,
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started_at__gte=day_start,
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started_at__lt=day_end).count()
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2026-09-15 13:55:13 +08:00
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new_v = Visitor.objects.filter(site=site, is_bot=False, first_seen_at__gte=day_start,
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2026-09-15 13:38:01 +08:00
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first_seen_at__lt=day_end).count()
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obj, _ = DailyStat.objects.update_or_create(site=site, date=date,
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defaults={"pv": pv, "uv": uv, "sessions": sessions, "new_visitors": new_v})
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return obj
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