ListSerializer instances get error "TypeError: 'ListSerializer' object is not iterable".

[isaque-dantas]

The error message is: TypeError: 'ListSerializer' object is not iterable. It happens when getting the attribute data from ConquestSerializer instances.

Here is the main serializer:

`class EventSerializer(serializers.ModelSerializer):
class Meta:
model = Event
fields = ['user_who_created', 'name', 'year', 'edition_number', 'conquests']

conquests = ConquestSerializer(many=True)`

The serializer where I get the error:

class ConquestSerializer(serializers.ModelSerializer):
    class Meta:
        model = Conquest
        fields = ['name', 'color', 'required_stamps', 'min_stamp_types_amount', 'stamps']
        # list_serializer_class = CustomListSerializer

    stamps = StampSerializer(many=True)

Pay attention to the commented line in ConquestSerializer; when I uncomment it, the application works fine.

The CustomListSerializer class:

class CustomListSerializer(serializers.ListSerializer):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

    def __iter__(self):
        self.is_valid()
        self.generator = iter(self.validated_data)
        return self.generator

    def __next__(self):
        return next(self.generator)

I just implemented Python's iterator protocol for when this class is passed through a for loop, and I think that it should be in the class rest_framework.serializers.ListSerializer.