fix(ad): 服务端强制不足一秒曝光收益为零 (#150)

## 改动
- eCPM 上报新增可选 exposure_ms，兼容旧客户端
- exposure_ms < 1000 时保留展示记录并强制有效 eCPM 为 0
- 失败领券任务允许保留短曝光零收益 trace，后台显示 0 而不是未填充
- 其他失败后的迟到曝光仍按原规则解绑 trace

## 验证
- 相关 pytest：10 passed
- Ruff：通过
- compileall：通过

依赖：先合并 Server #149。

---------

Co-authored-by: unknown <798648091@qq.com>
Reviewed-on: #150
Co-authored-by: linkeyu <linkeyu@wonderable.ai>
Co-committed-by: linkeyu <linkeyu@wonderable.ai>

app/api/v1/ad.py

@@ -281,7 +281,10 @@ def ecpm_report(payload: EcpmReportIn, user: CurrentUser, db: DbSession) -> Ecpm
     丢一两条不影响业务(穿山甲后台报表是结算权威)。eCPM 与发奖(S2S)是两条独立流,不逐条关联。
     """
     attributed_trace_id = crud_ecpm.attributable_trace_id(
-        db, feed_scene=payload.feed_scene, trace_id=payload.trace_id
+        db,
+        feed_scene=payload.feed_scene,
+        trace_id=payload.trace_id,
+        exposure_ms=payload.exposure_ms,
     )
     if payload.trace_id and attributed_trace_id is None:
         logger.info(
@@ -296,11 +299,12 @@ def ecpm_report(payload: EcpmReportIn, user: CurrentUser, db: DbSession) -> Ecpm
         feed_scene=payload.feed_scene,
         trace_id=attributed_trace_id,
         app_env=payload.app_env, our_code_id=payload.our_code_id,
+        exposure_ms=payload.exposure_ms,
     )
     logger.info(
-        "ad ecpm report user_id=%d type=%s scene=%s session=%s ecpm=%s adn=%s slot=%s app=%s code=%s",
+        "ad ecpm report user_id=%d type=%s scene=%s session=%s ecpm=%s exposure_ms=%s adn=%s slot=%s app=%s code=%s",
         user.id, payload.ad_type, payload.feed_scene, payload.ad_session_id, payload.ecpm,
-        payload.adn, payload.slot_id, payload.app_env, payload.our_code_id,
+        payload.exposure_ms, payload.adn, payload.slot_id, payload.app_env, payload.our_code_id,
     )
     return EcpmReportOut(ok=True)
 

app/repositories/ad_ecpm.py

@@ -15,9 +15,22 @@ from app.core.rewards import cn_today
 from app.models.ad_ecpm import AdEcpmRecord
 from app.models.coupon_state import CouponSession
 
+MIN_REVENUE_EXPOSURE_MS = 1000
+
+
+def effective_ecpm_raw(ecpm_raw: str, exposure_ms: int | None) -> str:
+    """曝光不足一秒时保留展示记录，但把该条有效 eCPM 归零。"""
+    if exposure_ms is not None and exposure_ms < MIN_REVENUE_EXPOSURE_MS:
+        return "0"
+    return ecpm_raw
+
 
 def attributable_trace_id(
-    db: Session, *, feed_scene: str | None, trace_id: str | None
+    db: Session,
+    *,
+    feed_scene: str | None,
+    trace_id: str | None,
+    exposure_ms: int | None = None,
 ) -> str | None:
     """返回广告展示允许归属的业务 trace。
 
@@ -31,7 +44,12 @@ def attributable_trace_id(
     session_status = db.execute(
         select(CouponSession.status).where(CouponSession.trace_id == trace_id)
     ).scalar_one_or_none()
-    return None if session_status in {"failed", "abandoned"} else trace_id
+    if session_status not in {"failed", "abandoned"}:
+        return trace_id
+    # 已真实上墙但不足一秒的曝光要在终态明细中明确显示 0，而不是被误判成“未填充”。
+    if exposure_ms is not None and exposure_ms < MIN_REVENUE_EXPOSURE_MS:
+        return trace_id
+    return None
 
 
 def create_ecpm_record(
@@ -47,6 +65,7 @@ def create_ecpm_record(
     trace_id: str | None = None,
     app_env: str | None = None,
     our_code_id: str | None = None,
+    exposure_ms: int | None = None,
 ) -> AdEcpmRecord:
     """落一条 eCPM 上报记录。report_date 用北京时间当天,供按天聚合。
 
@@ -67,7 +86,7 @@ def create_ecpm_record(
         trace_id=trace_id,
         app_env=app_env,
         our_code_id=our_code_id,
-        ecpm_raw=ecpm_raw,
+        ecpm_raw=effective_ecpm_raw(ecpm_raw, exposure_ms),
         report_date=cn_today().isoformat(),
     )
     db.add(rec)

app/schemas/ad.py

@@ -69,6 +69,12 @@ class EcpmReportIn(BaseModel):
         description="本次比价/领券 trace_id(信息流场景带上):把这条展示收益归属到对应比价/领券,"
         "供领券数据/比价记录看板聚合本场广告收益;激励视频/福利为空",
     )
+    exposure_ms: int | None = Field(
+        None,
+        ge=0,
+        le=86_400_000,
+        description="本条广告真实在屏曝光毫秒数；小于 1000ms 时收益强制按 0 计算。旧客户端不传则保持原口径",
+    )
     app_env: str | None = Field(
         None, max_length=16, description="我们的穿山甲应用环境:prod(傻瓜比价正式) / test(测试应用)"
     )

tests/test_ad_ecpm_trace_revenue.py

@@ -58,6 +58,32 @@ def test_revenue_yuan_by_trace_empty() -> None:
         db.close()
 
 
+def test_short_exposure_keeps_record_with_zero_revenue() -> None:
+    """不足一秒仍落展示记录，以便后台显示 0 而不是未填充。"""
+    db = SessionLocal()
+    try:
+        rec = crud_ecpm.create_ecpm_record(
+            db, 1, ad_type="draw", ecpm_raw="350",
+            ad_session_id="sess-short-exposure", feed_scene="coupon",
+            trace_id="trace-short-exposure", exposure_ms=999,
+        )
+        assert rec.ecpm_raw == "0"
+        assert crud_ecpm.revenue_yuan_by_trace(db, ["trace-short-exposure"]) == {
+            "trace-short-exposure": 0.0
+        }
+    finally:
+        db.execute(delete(AdEcpmRecord).where(
+            AdEcpmRecord.ad_session_id == "sess-short-exposure"
+        ))
+        db.commit()
+        db.close()
+
+
+def test_one_second_exposure_keeps_original_ecpm() -> None:
+    assert crud_ecpm.effective_ecpm_raw("350", 1000) == "350"
+    assert crud_ecpm.effective_ecpm_raw("350", None) == "350"
+
+
 def test_terminal_coupon_trace_is_not_attributable_to_late_impression() -> None:
     """领券失败或被放弃后才到达的广告展示保留收益记录，但不再关联死亡 trace。"""
     db = SessionLocal()
@@ -80,6 +106,12 @@ def test_terminal_coupon_trace_is_not_attributable_to_late_impression() -> None:
         assert crud_ecpm.attributable_trace_id(
             db, feed_scene="coupon", trace_id="abandoned-before-ad"
         ) is None
+        assert crud_ecpm.attributable_trace_id(
+            db, feed_scene="coupon", trace_id="failed-before-ad", exposure_ms=999
+        ) == "failed-before-ad"
+        assert crud_ecpm.attributable_trace_id(
+            db, feed_scene="coupon", trace_id="abandoned-before-ad", exposure_ms=999
+        ) == "abandoned-before-ad"
         assert crud_ecpm.attributable_trace_id(
             db, feed_scene="comparison", trace_id="failed-before-ad"
         ) == "failed-before-ad"