Implement DeviceModel.distinctCriteriaValues() — fixes 500 on /api/v1/devices/criteria-values. Uses MongoDB distinct() to get unique manufacturers, OUIs, productClasses from devices collection. Build status: Success

app/controllers/devices_controller.ts

@@ -8,7 +8,7 @@ export default class DevicesController {
   private deviceService = new DeviceService()
 
   async criteriaValues({ response }: HttpContext) {
-    const values = await (DeviceModel as any).distinctCriteriaValues()
+    const values = await DeviceModel.distinctCriteriaValues()
     return response.json(values)
   }
 

app/models/device.ts

@@ -38,6 +38,24 @@ export default class DeviceModel extends BaseModel {
     return { data, total }
   }
 
+  static async distinctCriteriaValues(): Promise<{
+    manufacturers: string[]
+    ouis: string[]
+    productClasses: string[]
+  }> {
+    const collection = this.getCollection()
+    const [manufacturers, ouis, productClasses] = await Promise.all([
+      collection.distinct('deviceId.manufacturer'),
+      collection.distinct('deviceId.oui'),
+      collection.distinct('deviceId.productClass'),
+    ])
+    return {
+      manufacturers: manufacturers.filter((v: any) => v && typeof v === 'string').sort(),
+      ouis: ouis.filter((v: any) => v && typeof v === 'string').sort(),
+      productClasses: productClasses.filter((v: any) => v && typeof v === 'string').sort(),
+    }
+  }
+
   static async createOrUpdate(device: Partial<DeviceRecord>): Promise<DeviceRecord> {
     const collection = this.getCollection()
     let filter: Filter<any> = {}