group queryset by date

Using Django
1

I have models:

class Meter(models.Model):
    """счетчик"""
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    name = models.CharField(max_length=400)
    person = models.ForeignKey(
        get_user_model(), on_delete=models.CASCADE, related_name="meters"
    )
    current_meter_reading = models.IntegerField()


class History(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    date = models.DateField()
    meter = models.ForeignKey(to=Meter, on_delete=models.CASCADE, related_name='history')
    meter_reading = models.IntegerField()
    consumption = models.DecimalField(max_digits=6, decimal_places=2)
    type = models.IntegerField(validators=[MinValueValidator(0), MaxValueValidator(1)])

And serializers for them:

class MeterSerializer(serializers.ModelSerializer):
    history = serializers.SlugRelatedField(
        many=True,
        read_only=True,
        slug_field='id'
    )

    class Meta:
        model = Meter
        fields = ('id', 'name', 'person', 'current_meter_reading', 'history')
        read_only_fields = ('id', 'person')


class HistorySerializer(serializers.ModelSerializer):

    class Meta:
        model = History
        fields = ['date', 'meter', 'meter_reading', 'consumption', 'type']

Now I am trying to write API-endpoit to get list of History model grouped by date,
I would like to retrieve data in format like this:

    "data": [
        {
            "period": "2021",
            "consumption": 30,
            "value": 110,
            "type": null,
            "children": [
                {
                    "period": "november",
                    "consumption": 5,
                    "value": 110,
                    "type": null,
                    "children": [
                        {
                            "period": "10.11.2021",
                            "consumption": 5,
                            "value": 110,
                            "type": 0,
                            "children": []
                        }
                    ]
                },
                {
                    "period": "Сентябрь",
                    "consumption": 25,
                    "value": 105,
                    "type": null,
                    "children": [
                        {
                            "period": "20.09.2021",
                            "consumption": 15,
                            "value": 105,
                            "type": 0,
                            "children": []
                        },
                        {
                            "period": "10.09.2021",
                            "consumption": 10,
                            "value": 90,
                            "type": 0,
                            "children": []
                        }
                    ]
                }
            ]
        },
        {
            "period": "2020",
            "consumption": 20,
            "value": 80,
            "type": null,
            "children": [
                {
                    "period": "december",
                    "consumption": 10,
                    "value": 80,
                    "type": null,
                    "children": [
                        {
                            "period": "10.12.2020",
                            "consumption": 10,
                            "value": 80,
                            "type": 0,
                            "children": []
                        }
                    ]
                },
                {
                    "period": "november",
                    "consumption": 10,
                    "value": 70,
                    "type": null,
                    "children": [
                        {
                            "period": "10.11.2020",
                            "consumption": 10,
                            "value": 70,
                            "type": 0,
                            "children": []
                        }
                    ]
                }
            ]
        }
    ]

Also I filtered all History objects that each user can view only History rows related only to him.
And tried to group like this:

histories = History.filter(meter__person=self.request.user)
q = (
            histories.annotate(year=TruncYear('date'), month=TruncMonth("date"), day=TruncDay('day')).values("month")
        )
return q

But when I try to get this endpoint KeyError appears with this error message:
Got KeyError when attempting to get a value for field dateon serializerHistorySerializer.\nThe serializer field might be named incorrectly and not match any attribute or key on the dict instance.\nOriginal exception text was: 'date'."

Please can anyone help how to implement grouping to get data as stated above.