Dymamic choice by selected field of model

[usbport11]

Goof day. Please help.

Making plugin for netbox.
Netbox version 3.4.3.

Trying to create form with select field that contain devices serial numbers.
And then use this field to filter next field with devices.

Try one:

serial = DynamicModelChoiceField(
  queryset=Device.objects.only.serial('serial'),
  required=False
)
device = DynamicModelChoiceField(
  queryset=Device.objects.all()
  query_params={
    'serial': '$serial'
  }
)

Serial field contain names of dervices instead of serial numbers only.

Try two:

serial = forms.CharField(
  widget=APISelect(api_url='/api/dcim/devices/'),
  required=False
)
device = DynamicModelChoiceField(
  queryset=Device.objects.all()
  query_params={
    'serial': '$serial'
  }
)

Same as first.

Try three:

serial = ChoiceField(
  choices=[(dev.serial, dev.serial) for dev in Device.objects.only.serial('serial')],
  required=False
)
device = DynamicModelChoiceField(
  queryset=Device.objects.all(),
  query_params={
    'serial': '$serial'
  }
)

Third method looks like good, but ChoiceField not allow dynamic update serial list by enter first letters of serial.