Django rest framework - filtering for serializer field

I have question about Django REST-full framework.

When products have rendered into remote client, each of product takes a filed with filtered data.

For example, model may be like this.

 class Product(models.Model):
      name = models.CharField()
 
 class Like(models.Model):
      product = models.ForeignKey(Product, related_name="likes")

On the client, each likes of product counted with true value, not false.

So I tried with below code in the serializer.

class ProductSerializer(serializers.ModelSerializer):
    
    likes = serializers.PrimaryKeyRelatedField(many=True, queryset=Like.objects.filter(whether_like=True))

	class Meta:
		model = Product
    	fields = ('id', 'name', 'likes')

But, that is not working as I wanted.

What should I do?

The following is extra view code.

@api_view(['GET'])
def product_list(request, user_id, format=None):

	if request.method == 'GET':
		products = Product.objects.all()
		serializer = ProductSerializer(products, many=True)
  
		return Response(serializer.data)
 

How about something like this:

class ProductSerializer(serializers.ModelSerializer):
    likes = serializers.SerializerMethodField()

    def get_likes(self, product):
        qs = Like.objects.filter(whether_like=True, product=product)
        serializer = LikeSerializer(instance=qs, many=True)
        return serializer.data

    class Meta:
        model = Product
        fields = ('id', 'name', 'likes')

**LikeSerializer omitted for brevity. Hope this helps.

Instead of SerializerMethodField, which causes one additional database query per object, you can now (starting with Django 1.7) use Prefetch objects in the queryset of your DRF ViewSet:

from rest_framework import viewsets
from django.db.models import Prefetch

class ProductViewSet(viewsets.ModelViewSet):
    queryset = Product.objects.prefetch_related(Prefetch(
        'likes',
        queryset=Like.objects.filter(like=True)))

The prefetch needs just one query, ensuring vastly superior performance compared to SerializerMethodField.