#51 feat: serializadores de categorias y categorias anidadas en productos

Issue #51: discriminacion y administracion de categorias de productos.

- ProductCategorySerializer (name/external_id read_only)
- ProductCategoryBriefSerializer para el JSON de productos
- ProductSerializer.categories ahora devuelve objetos anidados

tienda_ilusion/don_confiao/serializers/__init__.py

@@ -1,5 +1,10 @@
 from .catalogue_images import CatalogueImageSerializer
-from .products import ProductSerializer, ListProductSerializer
+from .products import (
+    ProductSerializer,
+    ListProductSerializer,
+    ProductCategorySerializer,
+    ProductCategoryBriefSerializer,
+)
 from .customers import CustomerSerializer, ListCustomerSerializer
 from .sales import (
     SaleSerializer,
@@ -26,6 +31,8 @@ __all__ = [
     # Products
     "ProductSerializer",
     "ListProductSerializer",
+    "ProductCategorySerializer",
+    "ProductCategoryBriefSerializer",
     # Customers
     "CustomerSerializer",
     "ListCustomerSerializer",

tienda_ilusion/don_confiao/serializers/products.py

@@ -4,11 +4,32 @@ from ..models.products import Product, ProductCategory
 from ..models.provenance import Supplier
 
 
+class ProductCategorySerializer(serializers.ModelSerializer):
+    class Meta:
+        model = ProductCategory
+        fields = [
+            "id",
+            "name",
+            "external_id",
+            "description",
+            "alternative_name",
+            "active",
+        ]
+        read_only_fields = ["name", "external_id"]
+
+
+class ProductCategoryBriefSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = ProductCategory
+        fields = ["id", "name", "alternative_name", "active"]
+
+
 class ProductSerializer(serializers.ModelSerializer):
     catalogue_images = serializers.SerializerMethodField()
     suppliers = serializers.PrimaryKeyRelatedField(
         many=True, queryset=Supplier.objects.all(), required=False
     )
+    categories = ProductCategoryBriefSerializer(many=True, read_only=True)
 
     class Meta:
         model = Product