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fix: calculate jt808 daily mileage from metric endpoints

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lingniu
2026-07-01 09:52:24 +08:00
parent bb051391c2
commit 0236884f81
7 changed files with 53 additions and 15 deletions
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docs/target-architecture.md
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@@ -125,13 +125,14 @@ Responsibilities:
- Calculate 808 daily mileage from the reported GPS total mileage only:
```text
daily_mileage_km = last_total_mileage_km - first_total_mileage_km
daily_mileage_km = max_total_mileage_km - min_total_mileage_km
calculation_method = JT808_TOTAL_MILEAGE_DIFF
```
- Store the metric in `vehicle_stat_metric` with
`metric_key = daily_mileage_km`; the first and latest GPS total mileage used
for the subtraction stay on the same metric row as calculation source columns.
`metric_key = daily_mileage_km`; the local-day minimum and maximum GPS total
mileage used for the subtraction stay on the same metric row as calculation
source columns.
There is no JT808-specific daily mileage table and no in-memory production
state-store mode. Restart recovery reads the same metric row, so it does not