Nesting serializers in nested serializers

My current serializers.py file is looking very complicated and I am not sure if it is the best way to do it.

Current my models.py looks something like

#models.py
class Subject(models.Model):
subjectname = models.CharField()

class Topic(models.Model):
topicname = models.CharField()
subject = models.ForeignKey(Subject, ondelete=models.CASCADE, relatedname='topics')

class Chapter(models.Model):
chaptername = modeks.CharField()
topic = models.ForeignKey(Topic, ondelete=models.CASCADE, relatedname='chapters'

My [views.py](https://views.py) looks something like

class ChapterListView(ListAPIView):
queryset = Subject.objects.all()
serializerclass = ChapterSerializer
filterbackends = [DjangoFilterBackend] #filters only the Subject
filtersetfields = 'subject_name'

My serializers.py looks something like

class ChapterSerializer(serializers.ModelSerializer):

class NestedTopicSerializer(serializers.ModelSerializer):

class NestedChapterSerializer(serializers.ModelSerializer):


/r/django
https://redd.it/ni8d9u