from rest_framework import serializers

from vbv_lernwelt.learnpath.models import Circle
from vbv_lernwelt.learnpath.serializer_helpers import get_it_serializer_class


class CircleSerializer(get_it_serializer_class(Circle, [])):
    children = serializers.SerializerMethodField()

    meta_fields = []

    def get_children(self, obj):
        return [c.specific.get_serializer_class()(c.specific).data for c in obj.get_children()]

    def get_meta_label(self, obj):
        return obj._meta.label

    class Meta:
        model = Circle
        fields = ['id', 'title', 'slug', 'children', 'type']