Preserve model forecasts and add gap backfill script

scripts/backfill_daily_record_model_gaps.py

@@ -0,0 +1,142 @@
+from __future__ import annotations
+
+import argparse
+import json
+import sys
+from collections import Counter
+from pathlib import Path
+from typing import Any, Dict
+
+PROJECT_ROOT = Path(__file__).resolve().parents[1]
+if str(PROJECT_ROOT) not in sys.path:
+    sys.path.insert(0, str(PROJECT_ROOT))
+
+from src.analysis.deb_algorithm import load_history, save_history
+from src.analysis.probability_snapshot_archive import load_snapshot_rows_for_day
+from src.database.runtime_state import STATE_STORAGE_FILE, get_state_storage_mode
+
+
+def _load_daily_records(path: Path) -> Dict[str, Dict[str, Dict[str, Any]]]:
+    data = load_history(str(path))
+    return data if isinstance(data, dict) else {}
+
+
+def _pick_model_value_from_snapshots(
+    city: str,
+    target_date: str,
+    model_name: str,
+) -> float | None:
+    rows = load_snapshot_rows_for_day(city, target_date)
+    values = []
+    for row in rows:
+        mm = row.get("multi_model") or {}
+        if not isinstance(mm, dict):
+            continue
+        value = mm.get(model_name)
+        if value is None:
+            continue
+        try:
+            values.append(float(value))
+        except Exception:
+            continue
+    if not values:
+        return None
+    counts = Counter(values)
+    return counts.most_common(1)[0][0]
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(
+        description="Backfill missing model forecasts in daily_records from archived probability snapshots."
+    )
+    parser.add_argument(
+        "--history-file",
+        default=str(Path("data") / "daily_records.json"),
+        help="Path to daily_records.json",
+    )
+    parser.add_argument("--city", help="Optional city filter, e.g. ankara")
+    parser.add_argument("--date", help="Optional YYYY-MM-DD filter")
+    parser.add_argument(
+        "--model",
+        default="MGM",
+        help="Model name to backfill from snapshot multi_model payloads",
+    )
+    parser.add_argument(
+        "--write",
+        action="store_true",
+        help="Write recovered values back to history file / runtime state",
+    )
+    args = parser.parse_args()
+
+    history_path = Path(args.history_file)
+    data = _load_daily_records(history_path)
+    model_name = str(args.model or "").strip()
+    city_filter = str(args.city or "").strip().lower() or None
+    date_filter = str(args.date or "").strip() or None
+
+    recovered = []
+    missing = []
+    changed = False
+
+    for city, city_rows in sorted(data.items()):
+        if city_filter and city != city_filter:
+            continue
+        if not isinstance(city_rows, dict):
+            continue
+        for target_date, record in sorted(city_rows.items()):
+            if date_filter and target_date != date_filter:
+                continue
+            if not isinstance(record, dict):
+                continue
+            forecasts = record.get("forecasts") or {}
+            if not isinstance(forecasts, dict):
+                forecasts = {}
+            if forecasts.get(model_name) is not None:
+                continue
+
+            recovered_value = _pick_model_value_from_snapshots(city, target_date, model_name)
+            if recovered_value is None:
+                missing.append((city, target_date))
+                continue
+
+            recovered.append((city, target_date, recovered_value))
+            if args.write:
+                next_forecasts = dict(forecasts)
+                next_forecasts[model_name] = recovered_value
+                record["forecasts"] = next_forecasts
+                changed = True
+
+    print(
+        json.dumps(
+            {
+                "model": model_name,
+                "recovered_count": len(recovered),
+                "missing_count": len(missing),
+                "recovered": [
+                    {"city": city, "date": date_str, "value": value}
+                    for city, date_str, value in recovered
+                ],
+                "missing": [
+                    {"city": city, "date": date_str}
+                    for city, date_str in missing
+                ],
+                "write_requested": bool(args.write),
+                "storage_mode": get_state_storage_mode(),
+            },
+            ensure_ascii=False,
+            indent=2,
+        )
+    )
+
+    if changed:
+        previous_mode = get_state_storage_mode()
+        # Reuse existing save path semantics. In sqlite-only mode, save_history would skip file write.
+        save_history(str(history_path), data)
+        if previous_mode == STATE_STORAGE_FILE and not history_path.exists():
+            raise FileNotFoundError(history_path)
+
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

src/analysis/deb_algorithm.py

@@ -296,8 +296,10 @@ def update_daily_record(
     if date_str not in data[city_name]:
         data[city_name][date_str] = {}
 
-    # 统一过滤已弃用模型，避免历史/展示残留
+    # 统一过滤已弃用模型，避免历史/展示残留。
-    forecasts = {
+    # 对同一天的多次刷新，保留历史上已经拿到的模型值，避免某次上游短暂缺失
+    # 把已有 forecast 整体覆盖成更稀疏的新字典，导致历史图断线。
+    next_forecasts = {
         k: v for k, v in (forecasts or {}).items() if not _is_excluded_model_name(k)
     }
 
@@ -346,10 +348,17 @@ def update_daily_record(
     old_mu = existing.get("mu")
     old_probs = existing.get("prob_snapshot")
     old_shadow_probs = existing.get("shadow_prob_snapshot")
+    old_forecasts = existing.get("forecasts") if isinstance(existing.get("forecasts"), dict) else {}
+    merged_forecasts = dict(old_forecasts)
+    for model_name, model_value in next_forecasts.items():
+        if model_value is not None:
+            merged_forecasts[model_name] = model_value
+        elif model_name not in merged_forecasts:
+            merged_forecasts[model_name] = model_value
     next_mu = round(mu, 2) if mu is not None else None
     if (
         old_actual == actual_high
-        and existing.get("forecasts") == forecasts
+        and old_forecasts == merged_forecasts
         and (deb_prediction is None or old_deb == deb_prediction)
         and (mu is None or old_mu == next_mu)
         and (compact_probs is None or old_probs == compact_probs)
@@ -375,7 +384,7 @@ def update_daily_record(
         except Exception:
             pass
 
-    existing["forecasts"] = forecasts
+    existing["forecasts"] = merged_forecasts
     existing["actual_high"] = actual_high
     if deb_prediction is not None:
         existing["deb_prediction"] = deb_prediction