How to Create Nested JSON in Django REST APIs

from django.db.models import QuerySetfrom rest_framework import serializersfrom skilltree.models import SkillTrees, SkillTreeHexagons, SkillTreePaths, SkillTreeHexagonNotesfrom drf_queryfields import QueryFieldsMixinclass SkillTreesSerializer(QueryFieldsMixin, serializers.ModelSerializer):    class Meta:        model = SkillTrees        fields = ('__all__')    paths = serializers.SerializerMethodField()    hexagons = serializers.SerializerMethodField()    hex_string_list = serializers.SerializerMethodField()    def get_hexagons(self, obj: SkillTrees) -> QuerySet:        '''        Get all hex ids that have the skill_tree_id        The object is the SkillTrees instance        For example, print(obj.skill_tree_id) will print each skill tree instance's skill_tree_id        '''        hexagons: QuerySet = SkillTreeHexagons.objects.filter(            skill_tree_id=obj.skill_tree_id).values()        return hexagons    def get_paths(self, obj: SkillTrees) -> QuerySet:        '''Get all hex ids that have the skill_tree_id'''        paths: QuerySet = SkillTreePaths.objects.filter(            skill_tree_id=obj.skill_tree_id).values()        return paths    def get_hex_string_list(self, obj: SkillTrees) -> QuerySet:        '''Collect all hex string ids'''        hex_string_ids_obj: QuerySet = SkillTreeHexagons.objects.filter(            skill_tree_id=obj.skill_tree_id).values_list('hex_string')        return hex_string_ids_obj

{  "skill_tree_id": 3,  "paths": [    {      "path_id": 1,      "skill_tree_id": 3,      "starting_hex_q": 0,      "starting_hex_r": 0,      "starting_hex_s": 0,      "ending_hex_q": 2,      "ending_hex_r": 0,      "ending_hex_s": -2,      "starting_hex_string": "0,0,0",      "ending_hex_string": "2,0,-2"    },    {      "path_id": 2,      "skill_tree_id": 3,      "starting_hex_q": 0,      "starting_hex_r": 0,      "starting_hex_s": 0,      "ending_hex_q": 0,      "ending_hex_r": 2,      "ending_hex_s": -2,      "starting_hex_string": "0,0,0",      "ending_hex_string": "0,2,-2"    }  ],  "hexagons": [    {      "hex_id": 1,      "note_id": null,      "hex_q": 1,      "hex_r": 1,      "hex_s": 1,      "skill_tree_id": 3,      "allow_verbal_feedback": false,      "allow_quantitative_feedback": true,      "image_address": "https://www.knowol.com/wp-content/uploads/2017/02/abraham-lincoln-1863.jpg",      "title": "ok",      "hex_string": "1,1,1"    },    {      "hex_id": 2,      "note_id": 1,      "hex_q": 2,      "hex_r": 2,      "hex_s": 2,      "skill_tree_id": 3,      "allow_verbal_feedback": true,      "allow_quantitative_feedback": false,      "image_address": "https://thecolloquial.com/wp-content/uploads/2020/07/Thomas_Paine_rev1-e1593883311631-319x180.jpg",      "title": "asdf",      "hex_string": "2,2,2"    }  ],  "hex_string_list": [["1,1,1"], ["2,2,2"]],  "name": "test tree",  "theme": "yagami"}