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Object of type 'UUID' is not JSON serializable

See original GitHub issue

I have stack daphe+asgi+djangochannelsrestframework for working with websockets. djangochannelsrestframework uses django channels under the hood, as I understand. So, I have 3 simple models:

import uuid
from django.db import models

class App(models.Model):
    key = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    short_name = models.CharField(max_length=100)

class Token(models.Model):
    token = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    app = models.ForeignKey(App, on_delete=models.CASCADE)

class Phone(models.Model):
    token = models.OneToOneField(Token, primary_key=True, on_delete=models.CASCADE)
    phone = models.CharField(max_length=12)

My simple serializers:

from .models import App, Token, Phone
from rest_framework import serializers

class AppSerializer(serializers.ModelSerializer):
    class Meta:
        model = App
        fields = ['key', 'short_name']

class TokenSerializer(serializers.ModelSerializer):
    class Meta:
        model = Token
        fields = ['token', 'app']

class PhoneSerializer(serializers.ModelSerializer):
    class Meta:
        model = Phone
        fields = ['phone', 'token']

So, when I try to retrieve a phone via ws I get an error:

Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/channels/routing.py", line 71, in __call__
    return await application(scope, receive, send)
  File "/usr/local/lib/python3.6/site-packages/channels/routing.py", line 160, in __call__
    send,
  File "/usr/local/lib/python3.6/site-packages/channels/consumer.py", line 94, in app
    return await consumer(scope, receive, send)
  File "/usr/local/lib/python3.6/site-packages/channelsmultiplexer/demultiplexer.py", line 61, in __call__
    await future
  File "/usr/local/lib/python3.6/site-packages/channels/consumer.py", line 94, in app
    return await consumer(scope, receive, send)
  File "/usr/local/lib/python3.6/site-packages/channels/consumer.py", line 62, in __call__
    await await_many_dispatch([receive], self.dispatch)
  File "/usr/local/lib/python3.6/site-packages/channels/utils.py", line 51, in await_many_dispatch
    await dispatch(result)
  File "/usr/local/lib/python3.6/site-packages/channels/consumer.py", line 73, in dispatch
    await handler(message)
  File "/usr/local/lib/python3.6/site-packages/channels/generic/websocket.py", line 196, in websocket_receive
    await self.receive(text_data=message["text"])
  File "/usr/local/lib/python3.6/site-packages/channels/generic/websocket.py", line 259, in receive
    await self.receive_json(await self.decode_json(text_data), **kwargs)
  File "/usr/local/lib/python3.6/site-packages/djangochannelsrestframework/consumers.py", line 160, in receive_json
    await self.handle_action(action, request_id=request_id, **content)
  File "/usr/local/lib/python3.6/site-packages/djangochannelsrestframework/consumers.py", line 151, in handle_action
    await self.handle_exception(exc, action=action, request_id=request_id)
  File "/usr/local/lib/python3.6/site-packages/djangochannelsrestframework/consumers.py", line 117, in handle_exception
    raise exc
  File "/usr/local/lib/python3.6/site-packages/djangochannelsrestframework/consumers.py", line 148, in handle_action
    await reply(data=data, status=status)
  File "/usr/local/lib/python3.6/site-packages/djangochannelsrestframework/consumers.py", line 177, in reply
    await self.send_json(payload)
  File "/usr/local/lib/python3.6/site-packages/channels/generic/websocket.py", line 273, in send_json
    await super().send(text_data=await self.encode_json(content), close=close)
  File "/usr/local/lib/python3.6/site-packages/channels/generic/websocket.py", line 281, in encode_json
    return json.dumps(content)
  File "/usr/local/lib/python3.6/json/__init__.py", line 231, in dumps
    return _default_encoder.encode(obj)
  File "/usr/local/lib/python3.6/json/encoder.py", line 199, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/usr/local/lib/python3.6/json/encoder.py", line 257, in iterencode
    return _iterencode(o, 0)
  File "/usr/local/lib/python3.6/json/encoder.py", line 180, in default
    o.__class__.__name__)
TypeError: Object of type 'UUID' is not JSON serializable

Please, help me to find out the reason it!