support datafields in projection

catalog/projection.go

@@ -92,13 +92,14 @@ type Projection struct {
 	// TaxClass uses a string identifier (see platform/tax class constants).
 	// Empty string means "unclassified"; the consumer's tax.Provider is what
 	// resolves the identifier to a numeric rate.
-	TaxClass         string `json:"tax_class"`
-	InventoryTracked bool   `json:"inventory_tracked"`
-	DropShip         bool   `json:"drop_ship"`
-	Category         string `json:"category,omitempty"`
-	Brand            string `json:"brand,omitempty"`
-	Image            string `json:"image,omitempty"`
-	UpdatedAt        int64  `json:"updated_at"`
+	Attributes       json.RawMessage `json:"attributes,omitempty"`
+	TaxClass         string          `json:"tax_class"`
+	InventoryTracked bool            `json:"inventory_tracked"`
+	DropShip         bool            `json:"drop_ship"`
+	Category         string          `json:"category,omitempty"`
+	Brand            string          `json:"brand,omitempty"`
+	Image            string          `json:"image,omitempty"`
+	UpdatedAt        int64           `json:"updated_at"`
 }
 
 // PayloadKey is the envelope key producers use when publishing a slice of