fix：修改了聚合查询

internal/dao/sensor.go

@@ -42,67 +42,56 @@ func (dao *SensorDAO) Insert(data *model.SensorData) error {
 
 // 获取聚合数据
 func (dao *SensorDAO) GetAggregatedData(start, end time.Time, interval string) ([]model.AggregatedData, error) {
-	var query string
+	// 参数化时间间隔
+	var intervalMinutes int
+	var timeFormat string
+
 	switch interval {
 	case "5min":
-		query = `
+		intervalMinutes = 5
-            SELECT 
+		timeFormat = "%Y-%m-%dT%H:%i:00"
-                DATE_FORMAT(
-                    FROM_UNIXTIME(
-                        FLOOR(UNIX_TIMESTAMP(timestamp)/(5*60))*(5*60)
-                    ),
-                    '%Y-%m-%dT%H:%i:00'
-                ) as ts,
-                ROUND(AVG(temperature)/10, 1) as avg_temp,
-                MAX(rainfall) - MIN(rainfall) as rainfall,
-                ROUND(AVG(humidity)/10, 1) as avg_humidity,
-                ROUND(AVG(wind_speed)/10, 1) as avg_wind_speed
-            FROM sensor_data 
-            WHERE timestamp BETWEEN ? AND ?
-            GROUP BY FLOOR(UNIX_TIMESTAMP(timestamp)/(5*60))
-            ORDER BY ts DESC
-        `
 	case "30min":
-		query = `
+		intervalMinutes = 30
-            SELECT 
+		timeFormat = "%Y-%m-%dT%H:%i:00"
-                DATE_FORMAT(
-                    FROM_UNIXTIME(
-                        FLOOR(UNIX_TIMESTAMP(timestamp)/(30*60))*(30*60)
-                    ),
-                    '%Y-%m-%dT%H:%i:00'
-                ) as ts,
-                ROUND(AVG(temperature)/10, 1) as avg_temp,
-                MAX(rainfall) - MIN(rainfall) as rainfall,
-                ROUND(AVG(humidity)/10, 1) as avg_humidity,
-                ROUND(AVG(wind_speed)/10, 1) as avg_wind_speed
-            FROM sensor_data 
-            WHERE timestamp BETWEEN ? AND ?
-            GROUP BY FLOOR(UNIX_TIMESTAMP(timestamp)/(30*60))
-            ORDER BY ts DESC
-        `
 	default: // 1hour
-		query = `
+		intervalMinutes = 60
-            SELECT 
+		timeFormat = "%Y-%m-%dT%H:00:00"
-                DATE_FORMAT(
-                    FROM_UNIXTIME(
-                        FLOOR(UNIX_TIMESTAMP(timestamp)/3600)*3600
-                    ),
-                    '%Y-%m-%dT%H:00:00'
-                ) as ts,
-                ROUND(AVG(temperature)/10, 1) as avg_temp,
-                MAX(rainfall) - MIN(rainfall) as rainfall,
-                ROUND(AVG(humidity)/10, 1) as avg_humidity,
-                ROUND(AVG(wind_speed)/10, 1) as avg_wind_speed
-            FROM sensor_data 
-            WHERE timestamp BETWEEN ? AND ?
-            GROUP BY FLOOR(UNIX_TIMESTAMP(timestamp)/3600)
-            ORDER BY ts DESC
-        `
 	}
 
-	rows, err := dao.db.Query(query, start, end)
+	// 计算秒数
+	intervalSeconds := intervalMinutes * 60
+
+	// 构建通用查询
+	query := `
+		SELECT 
+			DATE_FORMAT(
+				FROM_UNIXTIME(
+					FLOOR(UNIX_TIMESTAMP(timestamp)/?)*?
+				),
+				?
+			) as ts,
+			ROUND(AVG(temperature)/10, 1) as avg_temp,
+			MAX(rainfall) - MIN(rainfall) as rainfall,
+			ROUND(AVG(humidity)/10, 1) as avg_humidity,
+			ROUND(AVG(wind_speed)/10, 1) as avg_wind_speed
+		FROM sensor_data 
+		WHERE timestamp BETWEEN ? AND ?
+		GROUP BY FLOOR(UNIX_TIMESTAMP(timestamp)/?)
+		ORDER BY ts DESC
+	`
+
+	// 执行查询
+	rows, err := dao.db.Query(
+		query,
+		intervalSeconds, intervalSeconds, // 用于FROM_UNIXTIME参数
+		timeFormat, // DATE_FORMAT格式
+		start, end, // 时间范围
+		intervalSeconds, // GROUP BY参数
+	)
+
 	if err != nil {
-		logger.Logger.Printf("查询聚合数据失败: %v", err)
+		logger.Logger.Printf("查询聚合数据失败: %v (间隔=%s, 开始=%s, 结束=%s)",
+			err, interval, start.Format(time.RFC3339), end.Format(time.RFC3339))
 		return nil, err
 	}
 	defer rows.Close()
@@ -117,14 +106,23 @@ func (dao *SensorDAO) GetAggregatedData(start, end time.Time, interval string) (
 			logger.Logger.Printf("扫描数据行失败: %v", err)
 			continue
 		}
+
 		// 解析ISO格式的时间字符串
 		data.Timestamp, err = time.Parse("2006-01-02T15:04:05", tsStr)
 		if err != nil {
-			logger.Logger.Printf("解析时间失败: %v", err)
+			logger.Logger.Printf("解析时间失败: %v, 原始字符串: %s", err, tsStr)
 			continue
 		}
+
 		result = append(result, data)
 	}
 
+	// 检查是否有游标错误
+	if err = rows.Err(); err != nil {
+		logger.Logger.Printf("查询游标错误: %v", err)
+		return nil, err
+	}
+
+	logger.Logger.Printf("聚合查询成功: 返回%d条记录 (间隔=%s)", len(result), interval)
 	return result, nil
 }