feat: attrs on product

barcodes/attributes/composition_attribute_getter.py

@@ -0,0 +1,11 @@
+from barcodes.attributes.base import BaseAttributeGetter
+from models import Product
+
+
+class CompositionAttributeGetter(BaseAttributeGetter):
+
+    def get_value(self, product: Product):
+        result = product.composition
+        if not result:
+            result = ''
+        return result