Comment proxy classes

lib/open_food_network/product_proxy.rb

@@ -1,4 +1,7 @@
 module OpenFoodNetwork
+  # Variants can have several fields overridden on a per-enterprise basis by the
+  # VariantOverride model. These overrides can be applied to variants by wrapping their
+  # products in this proxy, which wraps the product's variants in VariantProxy.
   class ProductProxy
     instance_methods.each { |m| undef_method m unless m =~ /(^__|^send$|^object_id$)/ }
 

lib/open_food_network/variant_proxy.rb

@@ -1,4 +1,8 @@
 module OpenFoodNetwork
+  # Variants can have several fields overridden on a per-enterprise basis by the
+  # VariantOverride model. These overrides can be applied to variants by wrapping in an
+  # instance of the VariantProxy class. This class proxies most methods back to the wrapped
+  # variant, but checks for overrides when fetching some properties.
   class VariantProxy
     instance_methods.each { |m| undef_method m unless m =~ /(^__|^send$|^object_id$)/ }