Refactor vehicle loading in FalukantService: Update logic to load vehicle types and transports using separate queries, improving performance and preventing EagerLoadingError. Simplify data retrieval by mapping vehicle types and organizing transports by vehicle ID, enhancing code clarity and efficiency.

backend/services/falukantService.js

@@ -777,21 +777,32 @@ class FalukantService extends BaseService {
 
         const vehicles = await Vehicle.findAll({
             where,
-            include: [
+            attributes: ['id', 'vehicleTypeId', 'regionId', 'condition', 'availableFrom'],
-                {
-                    model: VehicleType,
-                    as: 'type',
-                    attributes: ['id', 'tr', 'capacity', 'transportMode', 'speed', 'buildTimeMinutes', 'cost'],
-                },
-                {
-                    model: Transport,
-                    as: 'transports',
-                    attributes: ['id', 'sourceRegionId', 'targetRegionId'],
-                    required: false,
-                },
-            ],
             order: [['availableFrom', 'ASC'], ['id', 'ASC']],
         });
+        const vehicleIds = vehicles.map(v => v.id);
+        const typeIds = [...new Set(vehicles.map(v => v.vehicleTypeId))];
+        const [types, transports] = await Promise.all([
+            typeIds.length ? VehicleType.findAll({
+                where: { id: typeIds },
+                attributes: ['id', 'tr', 'capacity', 'transportMode', 'speed', 'buildTimeMinutes', 'cost'],
+            }) : [],
+            vehicleIds.length ? Transport.findAll({
+                where: { vehicleId: vehicleIds },
+                attributes: ['id', 'vehicleId', 'sourceRegionId', 'targetRegionId'],
+            }) : [],
+        ]);
+        const typeMap = Object.fromEntries(types.map(t => [t.id, t]));
+        const transportsByVehicle = transports.reduce((acc, t) => {
+            const vid = t.vehicleId;
+            if (!acc[vid]) acc[vid] = [];
+            acc[vid].push(t);
+            return acc;
+        }, {});
+        for (const v of vehicles) {
+            v.setDataValue('type', typeMap[v.vehicleTypeId] || null);
+            v.setDataValue('transports', transportsByVehicle[v.id] || []);
+        }
 
         const now = new Date();
         const branchRegionId = regionId ? parseInt(regionId, 10) : undefined;