Django REST framework tuple being interpreted as a string?

Question

I've created the following serializer:

class KeywordSerializer(serializers.HyperlinkedModelSerializer):      

    class Meta:                                                                    
        model = Keyword                                                            
        fields = ('my_field')

However, when I try to use it in a viewset, I get the following error:

The fields option must be a list or tuple or "__all__". Got str.

But the issue is, fields is a tuple. I've even tried setting it to all or a list, but I get the same error. The same error occurs regardless of the name of the field.

Would anyone know why this happens?

Answer 1

Yes, in Python ('my_field') is a string. To make a single-element tuple you need a comma: ('my_field',).

Note this is nothing to do with DRF.