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feat: 日聚合服务与命令 + 索引迁移打包（Task3 审查结论）

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- refresh_daily：按上海自然日聚合 pv/uv/sessions/new_visitors，update_or_create 幂等
- refresh_stats 管理命令：回刷近 N 天（生产由 1Panel 每日 00:10 调度，见 Task 22）
- 索引打包（0002）：Event/VisitSession 增加 (site, 时间) 日聚合索引；
  删 5 个冗余单列 FK 索引（Event.site/session、VisitSession.site/visitor、DailyStat.site），
  保留 Event.visitor/Visitor.site；sqlite PRAGMA 实证级联索引完整、EXPLAIN 走新索引
- test_models：IntegrityError 断言收紧 + Site 级联删除测试

Co-Authored-By: Claude Code <noreply@anthropic.com>
This commit is contained in:
浅念
2026-09-15 13:38:01 +08:00
parent f69822859e
commit cc1ea6805b
8 changed files with 153 additions and 7 deletions
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server/tracker/models.py
+14 -6
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@@ -53,8 +53,9 @@ class Visitor(models.Model):
class VisitSession(models.Model):
site = models.ForeignKey(Site, on_delete=models.CASCADE, related_name="sessions")
visitor = models.ForeignKey(Visitor, on_delete=models.CASCADE, related_name="sessions")
# db_index=False：单列 FK 索引冗余——site 由 (site, started_at)、visitor 由 (visitor, -started_at) 复合索引前缀覆盖
site = models.ForeignKey(Site, on_delete=models.CASCADE, related_name="sessions", db_index=False)
visitor = models.ForeignKey(Visitor, on_delete=models.CASCADE, related_name="sessions", db_index=False)
session_id = models.CharField(max_length=64)
started_at = models.DateTimeField()
ended_at = models.DateTimeField()
@@ -68,13 +69,19 @@ class VisitSession(models.Model):
class Meta:
db_table = "visit_session"
constraints = [models.UniqueConstraint(fields=["site", "session_id"], name="uq_site_session")]
indexes = [models.Index(fields=["visitor", "-started_at"])]
indexes = [
models.Index(fields=["visitor", "-started_at"]),
models.Index(fields=["site", "started_at"]), # 按日聚合/时间线查询
]
class Event(models.Model):
site = models.ForeignKey(Site, on_delete=models.CASCADE, related_name="events")
# site/session 的单列 FK 索引冗余：site 由 (site, visitor/-occurred_at)、(site, event_name, -occurred_at)、
# (site, occurred_at) 前缀覆盖，session 由 (session, occurred_at) 前缀覆盖，故 db_index=False。
# visitor 保留默认索引：无其他以 visitor 打头的索引，级联删除（visitor 反向删 events）需要它。
site = models.ForeignKey(Site, on_delete=models.CASCADE, related_name="events", db_index=False)
visitor = models.ForeignKey(Visitor, on_delete=models.CASCADE, related_name="events")
session = models.ForeignKey(VisitSession, on_delete=models.CASCADE, related_name="events", null=True)
session = models.ForeignKey(VisitSession, on_delete=models.CASCADE, related_name="events", null=True, db_index=False)
event_id = models.CharField(max_length=64)
event_name = models.CharField(max_length=50)
occurred_at = models.DateTimeField()
@@ -96,11 +103,12 @@ class Event(models.Model):
models.Index(fields=["site", "visitor", "-occurred_at"]),
models.Index(fields=["session", "occurred_at"]),
models.Index(fields=["site", "event_name", "-occurred_at"]),
models.Index(fields=["site", "occurred_at"]), # refresh_daily 按日聚合扫描
]
class DailyStat(models.Model):
site = models.ForeignKey(Site, on_delete=models.CASCADE, related_name="daily_stats")
site = models.ForeignKey(Site, on_delete=models.CASCADE, related_name="daily_stats", db_index=False) # uq_site_date 前缀覆盖
date = models.DateField()
pv = models.PositiveIntegerField(default=0)
uv = models.PositiveIntegerField(default=0)