Self-referencing foreign keys / Serializing nested objects

[gom]

I have a "Category" model which has a foreign key pointing to itself. The idea is that categories can have sub-categories. As far as the normal django ORM is concerned this works great, but I think I'm having trouble serializing categories. My aim is to have a serialization like:

    {
        "name": "Category 1", 
        "subcategories": [
                           {
                              "name": "Category 1A (a sub-category)", 
                              "subcategories": [...]
                                                       },            
                         ]
    }

And of course it would be nice to have a limit on how deep the structure goes, but I haven't been able to get that far because I'm running up against an issue where the nesting doesn't seem to serialize right:

# ListAPIView output for serializer below:

    {
        "created": "2013-02-18T01:09:48Z", 
        "name": "category number 1", 
        "subcategories": [
            "Category object"
        ]
    }, 

Anyone have any ideas on the right way to do this? Custom relational field?

Cheers

    # --- Model ----

    class Category(Model):

      created  = models.DateTimeField()

      name     = models.CharField(max_length=255)

      parent   = models.ForeignKey("self", blank=True, null=True, related_name="subcategories")

      # (a self-referenced foreign key)

    # ---- Serializer ----

    class CategorySerializer(serializers.ModelSerializer):

        subcategories = serializers.RelatedField(many=True, read_only=True)

        class Meta:

            model = Suite

            fields = ('created', 'name', 'subcategories')

[gom]

Ok looks like the same question has been asked and answered :) Solved this with Tom's answer on SO  http://stackoverflow.com/questions/13376894/django-rest-framework-nested-self-referential-objects

CategorySerializer.base_fields['subcategories'] = CategorySerializer()

Exactly what I needed