后端统一时区为 UTC

app/infra/db/timescaledb/internal_queries.py

@@ -10,6 +10,7 @@ from app.core.config import get_timescaledb_pgconn_string
 from app.infra.db.timescaledb.repositories.scheme import SchemeRepository
 from app.infra.db.timescaledb.repositories.realtime import RealtimeRepository
 from app.infra.db.timescaledb.repositories.scada import ScadaRepository
+from app.services.time_api import parse_utc_time
 
 
 class InternalStorage:
@@ -89,10 +90,9 @@ class InternalQueries:
     ) -> dict:
         """查询指定时间点的 SCADA 数据"""
 
-        # 解析时间，假设是北京时间
-        beijing_time = datetime.fromisoformat(query_time)
-        start_time = beijing_time - timedelta(seconds=1)
-        end_time = beijing_time + timedelta(seconds=1)
+        target_time = parse_utc_time(query_time, field_name="query_time")
+        start_time = target_time - timedelta(seconds=1)
+        end_time = target_time + timedelta(seconds=1)
 
         for attempt in range(max_retries):
             try:
@@ -132,14 +132,8 @@ class InternalQueries:
         max_retries: int = 3,
     ) -> dict[str, list[dict]]:
         """查询指定时间窗的 SCADA 数据，返回 {device_id: [{time, value}, ...]}。"""
-        start_dt = (
-            datetime.fromisoformat(start_time)
-            if isinstance(start_time, str)
-            else start_time
-        )
-        end_dt = (
-            datetime.fromisoformat(end_time) if isinstance(end_time, str) else end_time
-        )
+        start_dt = parse_utc_time(start_time, field_name="start_time")
+        end_dt = parse_utc_time(end_time, field_name="end_time")
 
         for attempt in range(max_retries):
             try:
@@ -238,14 +232,8 @@ class InternalQueries:
         if not element_ids:
             return {}
 
-        start_dt = (
-            datetime.fromisoformat(start_time)
-            if isinstance(start_time, str)
-            else start_time
-        )
-        end_dt = (
-            datetime.fromisoformat(end_time) if isinstance(end_time, str) else end_time
-        )
+        start_dt = parse_utc_time(start_time, field_name="start_time")
+        end_dt = parse_utc_time(end_time, field_name="end_time")
         table_name, valid_fields = InternalQueries._resolve_simulation_table(element_type)
         if field not in valid_fields:
             raise ValueError(f"Invalid field for {element_type}: {field}")