Null issues in getDeviceService().getUserDevices(PageLink(1))

[Dmuldoraf]

Hi,
I faced the following error, while try calling _tbClient.getDeviceService().getUserDevices(PageLink(1)):
E/flutter ( 5652): [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: type 'Null' is not a subtype of type 'Map<String, dynamic>' E/flutter ( 5652): #0 new Device.fromJson package:thingsboard_pe_client/…/model/device_models.dart:766 E/flutter ( 5652): #1 parseDevicePageData.<anonymous closure> package:thingsboard_pe_client/…/service/device_service.dart:8 E/flutter ( 5652): #2 dataFromJson.<anonymous closure> package:thingsboard_pe_client/…/page/page_data.dart:35 E/flutter ( 5652): #3 MappedListIterable.elementAt (dart:_internal/iterable.dart:413:31) E/flutter ( 5652): #4 ListIterator.moveNext (dart:_internal/iterable.dart:342:26) E/flutter ( 5652): #5 new _GrowableList._ofEfficientLengthIterable (dart:core-patch/growable_array.dart:206:27) E/flutter ( 5652): #6 new _GrowableList.of (dart:core-patch/growable_array.dart:153:28) E/flutter ( 5652): #7 new List.of (dart:core-patch/array_patch.dart:51:28)

While debugging, I recieved this:
in device_model.dart

With the following runtime variables:

Most of the devices parameter are empty, because I created it just with the necessary params with the API.
How can I use the method _tbClient.getDeviceService().getUserDevices(PageLink(1)) with this kind of devices?

Best regards :)

[vvlladd28]

Hi @Dmuldoraf,
This is an exciting issue. Can you tell in more detail which version of the TB platform is installed in the server where you connect the app? Because deviceProfileId is the required field.

[drausal]

Ran into this issue as a "CUSTOMER_USER" not "TENANT_ADMIN" the fix was to check if its null

This was required for both deviceProfileId and deviceData

Device.fromJson(Map<String, dynamic> json)
       : tenantId = TenantId.fromJson(json['tenantId']),
         customerId = json['customerId'] != null
             ? CustomerId.fromJson(json['customerId'])
             : null,
         name = json['name'],
         type = json['type'],
         label = json['label'],
         deviceProfileId = json['deviceProfileId'] != null ? DeviceProfileId.fromJson(json['deviceProfileId']) : null,
         firmwareId = json['firmwareId'] != null
             ? OtaPackageId.fromJson(json['firmwareId'])
             : null,
         softwareId = json['softwareId'] != null
             ? OtaPackageId.fromJson(json['softwareId'])
             : null,
         deviceData = json['deviceData'] != null ? DeviceData.fromJson(json['deviceData']) : DeviceData(),
         externalId = json['externalId'] != null
             ? DeviceId.fromJson(json['externalId'])
             : null,
         super.fromJson(json);

Server: Ubuntu
TB Version: PE 3.4 
Flutter: 3.0.5
Dart: 2.17.6