django rest framework serialize the related fields - django

Question

models.py
class Category(models.Model):
name = models.CharField(max_length=128)
class Product(models.Model):
category = models.ManyToManyField(Category, related_name="category")
name = models.CharField(max_length=128)
class ProductVariation(models.Model):
product = models.ForeignKey(Product, related_name="product")
name = models.CharField(max_length=128)
serializers.py
class ProductVariantSerializer(serializers.HyperlinkedModelSerializer)
class Meta:
model = ProductVariation
fields = (
"name",
)
class CategoryDetailSerializer(serializers.Modelserializer):
product_variant = PromotionVariantSerializer(many=True)
class Meta:
model = Category
fields =(
"name",
"product_variant" #how can i do this
)
here i want to list all the product variant that belongs to the category.
can i do this way or i want to write methods to get the product variant details

Answer 1

You may need to write serializers for Product and ProductVariation models. You can't display the ProductVariation objects right in the Category model serializer, as there is no direct relation between Category and ProductVariation models. But you could try may be using separate nested serializers for Product and ProductVariation models.
class ProductVariantSerializer(serializers.ModelSerializer):
class Meta:
model = ProductVariation
fields = ("name", )
class ProductSerializer(serializers.ModelSerializer):
variants = ProductVariantSerializer(source='product', many=True, read_only=True)
class Meta:
model = Product
fields = ('name', 'variants')
class CategorySerializer(serializers.ModelSerializer):
products = ProductSerializer(source='category', many=True, read_only=True)
class Meta:
model = Category
fields = ('name', 'products')
You could use the CategorySerializer for nested relationships.