How to show name instead of id with foreighkey with django restframework

I have a django application. And a foreign relationship. But the api calls shows the id instead of the name. But I want to show the name instead of the id.

So this is the property:

category = models.ForeignKey(Category, related_name='animals', on_delete=models.CASCADE, verbose_name="test")    

and serializer:

class SubAnimalSerializer(serializers.ModelSerializer):
    class Meta:
        model = Animal
        fields = ['id', 'name', 'description',"category","pet_list", 'images' ]
        read_only_fields = ['id']

so this is part of the api call:

"animals": [
        {
            "id": 3,
            "name": "Vicuña",
            "description": "kjhkkhkhkjhjkhj Hello",
            "category": 6,
            "pet_list": "D",
            "images": "http://192.168.1.135:8000/media/media/photos/animals/mammal.jpg"
        },
        {
            "id": 5,
            "name": "Goudhamster",
            "description": "khkjh",
            "category": 6,
            "pet_list": "C",
            "images": "http://192.168.1.135:8000/media/media/photos/animals/imgbin_dog-grooming-puppy-cat-pet-png_I7rLPen.png"
        }
    ],

And I googled something ofcourse. So I found this:

How to show name instad of id in django ForeignKey?

But it doesn’t exactly fit what I am looking for.

Question: how to show name instead of id in api call

>Solution :

You can work with a SlugRelatedField ^[drf-doc]:

class SubAnimalSerializer(serializers.ModelSerializer):
    category = serializers.SlugRelatedField(
        slug_field='name', queryset=Category.objects.all()
    )

    class Meta:
        model = Animal
        fields = ['id', 'name', 'description', 'category', 'pet_list', 'images']
        read_only_fields = ['id']

In order to write, the name field in Category should be unique, and preferrably have a db_index=True.